Details of the Researcher

PHOTO

Masaki Kubo
Section
Graduate School of Engineering
Job title
Professor
Degree

  • 博士（工学）（東北大学）

  • 修士（工学）（東北大学）

Research History 5

  • 2022/04 - Present
    School of Engineering, Tohoku University　Professor

  • 2010/08 - 2022/03
    School of Engineering, Tohoku University　Associate Professor

  • 2007/07 - 2008/03
    The University of Sheffield　Visiting Researcher

  • 1998/04 - 2000/03
    Institute of Chemical Reaction Science, Tohoku University, Researcher

  • 2000/04 -
    School of Engineering, Tohoku University

Education 3

  • Tohoku University　Graduate School, Division of Engineering　Department of Chemical Engineering

    1995/04 - 1998/03

  • Tohoku University　Graduate School of Engineering　Department of Chemical Engineering

    1993/04 - 1995/03

  • Tohoku University　School of Engineering

    1989/04 - 1993/03

Committee Memberships 13

  • 宮城化学工学懇話会　庶務幹事

    2019/03 - Present

  • 化学工学会東北支部　庶務幹事

    2019/03 - Present

  • 化学工学会反応工学部会ソノプロセス分科会　代表

    2018/04 - Present

  • 化学工学会反応工学部会　会計

    2018/04 - Present

  • 日本ソノケミストリー学会　役員

    2016/04 - Present

  • 化学工学会東北支部　会計幹事

    2011/03 - 2019/02

  • 宮城化学工学懇話会　会計

    2011/03 - 2019/02

  • 化学工学会反応工学部会ソノプロセス分科会　副代表

    2014/04 - 2018/03

  • 化学工学会反応工学部会ソノプロセス分科会　庶務幹事

    2010/04 - 2014/03

  • 化学工学会　化学工学会誌編集委員

    2011/04 - 2013/03

  • 化学工学会東北支部　運営委員

    2002/03 - 2011/02

  • 宮城化学工学懇話会　幹事

    2002/03 - 2011/02

  • 化学工学会反応工学部会ソノプロセス分科会　企画委員

    2006/04 - 2010/03

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Professional Memberships 10

  • The Society of Powder Technology, Japan

    2017/04 - Present

  • 日本熱物性学会

    2020 - Present

  • 日本結晶成長学会

    2015/08 - Present

  • The Heat Transfer Society of Japan

    2013 - Present

  • Japan Society of Sonochemistry

    2010 - Present

  • 日本化学会

    2008 - Present

  • AIChE

    2005 - Present

  • The Japan Society for Precision Engineering

    2000 - Present

  • The Ceramic Society of Japan

    1998 - Present

  • The Society of Chemical Engineers, Japan

    1993/06 - Present

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Research Interests 3

  • Particle technology

  • Sonochemistry

  • Reaction kinetics

Research Areas 2

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Transfer phenomena and unit operations / Powder Technology

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Chemical reaction and process system engineering / Chemical Reaction Engineering

Awards 12

  1. 2019年度 日本伝熱学会学術賞

    2020/06　日本伝熱学会　溶融Cu基合金の伝熱・流動特性の解明及び相分離構造との相関に関する研究

  2. Outstanding Paper Award of 2019, Japan Society of Sonochemistry

    2019/11　Japan Society of Sonochemistry　Control of Molecular Weight Distribution in Synthesis of Poly(2-Hydroxyethyl Methacrylate) Using Ultrasonic Irradiation

  3. Journal of Chemical Engineering of Japan, Outstanding Paper Award 2018

    2019/03　The Society of Chemical Engineers, Japan　Effect of Surface Modifier of Nanoparticles on Dewetting Behaviors of Polymer Nanocomposite Thin Films

  4. 2018年度日本マイクログラビティ応用学会論文賞

    2018/10　日本マイクログラビティ応用学会　SiGe Crystal Growth by the Travelling Liquidus-Zone Method abroad the International Space Station

  5. 2016年度 化学工学会熱工学部会賞

    2016/09　化学工学会熱工学部会　静磁場重畳電磁浮遊法を利用した溶融CuCo合金の熱伝導率測定

  6. 2014年度 化学工学会熱工学部会賞

    2014/09　化学工学会熱工学部会　静磁場重畳電磁浮遊法を利用した溶融CuCo合金の垂直分光放射率測定

  7. Edwin N. Frankel Award for Best Paper of 2012, Lipid Oxidation and Quality Division of the American Oil Chemist's Society

    2013/05　The American Oil Chemist’s Society　Journal of the American Oil Chemists' Society, (2012) 89:815?824. A Kinetic Model Describing Anti-oxidation and Pro-oxidation of β-Carotene in the Presence of α-Tocopherol and Ascorbic Acid

  8. Outstanding Paper Award of 2011, Journal of Chemical Engineering of Japan

    2012/03/16　Society of Chemical Engineering of Japan　JCEJ, 44(5), 321-327(2011) "Relationship between Applied Static Magnetic Field Strength and Thermal Conductivity Values of Molten Materials easured Using the EML Technique"

  9. 2011年度 化学工学会熱工学部会賞

    2011/09　化学工学会熱工学部会　静磁場重畳電磁浮遊法を用いた溶融Cuの熱伝導率測定

  10. 財団法人青葉工学振興会第１１回「研究奨励賞」

    2005/12/14　財団法人青葉工学振興会

  11. 第１５回トーキン科学技術振興財団研究奨励賞

    2005/03/07　トーキン科学技術振興財団

  12. 精密工学会春季大会学術講演会ベストプレゼンテーション賞

    2000/03/24　精密工学会

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Papers 85

  1. Evaluation of interfacial affinity between surface-modified metal oxide and solvent mixture using molecular dynamics simulations

    Yuto Sato, Yoichiro Kurosawa, Takamasa Saito, Eita Shoji, Gota Kikugawa, Donatas Surblys, Atsuki Komiya, Takaaki Tomai, Masaki Kubo

    The Journal of Chemical Physics　2025/08/21

    DOI： 10.1063/5.0288662 　

  2. Superspreading Wetting of Nanofluid Droplet Laden with Highly Dispersed Nanoparticles

    Eita Shoji, Akira Hoshino, Tetsushi Biwa, Masaki Kubo, Takao Tsukada, Takaaki Tomai, Tadafumi Adschiri

    Langmuir　2024/12/17

    DOI： 10.1021/acs.langmuir.4c03347 　

  3. Combined substituent number utilized machine learning for the development of antimicrobial agent Peer-reviewed

    Keitaro Yamauchi, Hirotaka Nakatsuji, Takaaki Kamishima, Yoshitaka Koseki, Masaki Kubo, Hitoshi Kasai

    Scientific Reports　14　(1)　2024/12

    DOI： 10.1038/s41598-024-53888-2 　

    eISSN： 2045-2322

  4. Molecular dynamics simulations for interfacial structure and affinity between carboxylic acid-modified Al2O3 and polymer melts Peer-reviewed

    Takamasa Saito, Masaki Kubo, Takao Tsukada, Eita Shoji, Gota Kikugawa, Donatas Surblys, Momoji Kubo

    The Journal of Chemical Physics　159　(16)　2023/10/27

    Publisher: AIP Publishing

    DOI： 10.1063/5.0169721 　

    ISSN： 0021-9606

    eISSN： 1089-7690

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    Controlling the dispersion state of nanoparticles in a polymer matrix is necessary to produce polymer nanocomposites. The surface modification of nanoparticles is used to enable their dispersion in polymers. Moreover, molecular dynamics (MD) simulations are useful for revealing the interfacial properties between nanoparticles and polymers to aid in the design of materials. In this study, the effect of surface coverage, modifier length, and polymer species on the interfacial structure and affinity between surface-modified Al2O3 and polymer melts were investigated using all-atom MD simulations. Hexanoic, decanoic, and tetradecanoic acids were used as surface modifiers, and polypropylene (PP), polystyrene (PS), and poly (methyl methacrylate) (PMMA) were used as polymers. The work of adhesion Wadh and the work of immersion Wimm were selected as quantitative measures of affinity. Wadh was calculated using the phantom-wall approach, and Wimm was calculated by simply subtracting the surface tension of polymers γL from Wadh. The results showed that Wadh and Wimm were improved by surface modification with low coverage, owing to a good penetration of the polymer. The effect of modifier length on Wadh and Wimm was small. Whereas Wadh increased in the following order: PP < PS < PMMA, Wimm increased as follows: PMMA < PS < PP. Finally, the trend of Wadh and Wimm was organized using the Flory–Huggins interaction parameter χ between the modifier and the polymer. This study demonstrates that the interfacial affinity can be improved by tuning the surface coverage and modifier species depending on the polymer matrix.

  5. Cooling rate of reactant solution in a flow-type supercritical hydrothermal reactor estimated using neutron radiography Peer-reviewed

    Ryosuke Sasaki, Kosei Sato, Bo Xie, Seiichi Takami, Masaki Kubo, Takao Tsukada, Katsumi Sugimoto, Naoya Odaira, Daisuke Ito, Yasushi Saito

    Journal of Physics: Conference Series　2605　(1)　012029-012029　2023/09/01

    Publisher: IOP Publishing

    DOI： 10.1088/1742-6596/2605/1/012029 　

    ISSN： 1742-6588

    eISSN： 1742-6596

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    Abstract Rapid cooling of reactants quenches the intermediate state of chemical reactions and enables the synthesis of novel materials that cannot be realized by thermodynamic equilibrium processes. In this study, we estimated the cooling rate of reactant solutions during the supercritical hydrothermal synthesis of metal oxide nanoparticles. Neutron radiography measurements were performed to visualize the profile of the average water density at a junction where a stream of heated water was mixed with another stream of cooling water. The cooling rate of the heated water that mimicked the reactant solution was estimated using the relationship between the density and temperature of water under constant pressure conditions. This result should provide vital information about the flow-type synthesis of novel metal oxide nanoparticles.

  6. Comparison of Phase Separation Structures between Undercooled Cu–Fe and Cu–Co Alloys Solidified Under a Static Magnetic Field Peer-reviewed

    Taiki Okuyama, Rikuto Suzuki, Masaki Kubo, Takao Tsukada, Eita Shoji, Hiroyuki Fukuyama

    Journal of Chemical Engineering of Japan　56　(1)　2211117　2023/05/17

    Publisher: Informa UK Limited

    DOI： 10.1080/00219592.2023.2211117 　

    ISSN： 0021-9592

    eISSN： 1881-1299

  7. Theoretical Analysis of Simulated Moving Bed Reactor for Rapid Reversible Acetalization of Glycerol with Acetone to Synthesize Solketal Peer-reviewed

    Takuya Fukumura, Yuya Ono, Ryo Nagasawa, Tsutomu Chida, Kazuhisa Sato, Masaki Kubo

    Journal of Chemical Engineering of Japan　56　(1)　2204895　2023/05/17

    Publisher: Informa UK Limited

    DOI： 10.1080/00219592.2023.2204895 　

    ISSN： 0021-9592

    eISSN： 1881-1299

  8. Effects of the mixer shape in a flow-type supercritical hydrothermal reactor as evaluated by neutron radiography and CeO2 nanoparticle synthesis Peer-reviewed

    Kosei Sato, Ryosuke Sasaki, Bo Xie, Seiichi Takami, Masaki Kubo, Takao Tsukada, Katsumi Sugimoto, Naoya Odaira, Daisuke Ito, Yasushi Saito

    Reaction Chemistry & Engineering　8　1449　2023

    DOI： 10.1039/D3RE00018D 　

  9. Effect of surface modifier and solvent on the affinity between the surface-modified solid and organic solvent: A molecular dynamics study Peer-reviewed

    Takamasa Saito, Ryo Takebayashi, Masaki Kubo, Takao Tsukada, Eita Shoji, Gota Kikugawa, Donatas Surblys

    AIP Advances　12　(10)　123607　2022/10/01

    DOI： 10.1063/5.0119681 　

    eISSN： 2158-3226

  10. Control of the temperature responsiveness of poly(N-isopropylacrylamide-co-2-hydroxyethyl methacrylate) copolymer using ultrasonic irradiation Peer-reviewed

    Masaki Kubo, Masato Higuchi, Tomoyuki Koshimura, Eita Shoji, Takao Tsukada

    Ultrasonics Sonochemistry　79　105752　2021/11

    DOI： 10.1016/j.ultsonch.2021.105752 　

    ISSN： 1350-4177

    eISSN： 1873-2828

  11. Measurement of dynamic wetting using phase-shifting imaging ellipsometer: comparison of pure solvent and nanoparticle suspension on film thickness profile, apparent contact angle, and precursor film length Peer-reviewed

    Eita Shoji, Takahiro Kaneko, Tatsuya Yonemura, Masaki Kubo, Takao Tsukada, Atsuki Komiya

    Experiments in Fluids　62　(10)　2021/10

    DOI： 10.1007/s00348-021-03296-3 　

    ISSN： 0723-4864

    eISSN： 1432-1114

  12. Erratum: "Evaluation of the work of adhesion at the interface between a surface-modified metal oxide and an organic solvent using molecular dynamics simulations" [J. Chem. Phys. 154, 114703 (2021)]. International-journal Peer-reviewed

    Takamasa Saito, Eita Shoji, Masaki Kubo, Takao Tsukada, Gota Kikugawa, Donatas Surblys

    The Journal of chemical physics　155　(6)　069901-069901　2021/08/14

    DOI： 10.1063/5.0062003 　

  13. Numerical investigation of growth interface shape and compositional distributions in SiGe crystals grown by the TLZ method in the International Space Station Peer-reviewed

    Satoshi Baba, Yoshiaki Nakamura, Masahiro Mikami, Eita Shoji, Masaki Kubo, Takao Tsukada, Kyoichi Kinoshita, Yasutomo Arai, Yuko Inatomi

    Journal of Crystal Growth　566-567　2021/07/15

    DOI： 10.1016/j.jcrysgro.2021.126157 　

    ISSN： 0022-0248

  14. Numerical Simulation of Laminar-Turbulent Transition in Magnetohydrodynamic Convection in an Electromagnetically Levitated Molten Droplet of Cu-Co Alloys Under a Static Magnetic Field Peer-reviewed

    Eita Shoji, Koki Tanada, Ryuji Takahashi, Shosei Isogai, Rikuto Suzuki, Masaki Kubo, Takao Tsukada, Atsuki Komiya, Hiroyuki Fukuyama

    Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science　52　(2)　896-902　2021/04

    DOI： 10.1007/s11663-021-02063-3 　

    ISSN： 1073-5615

  15. Evaluation of the work of adhesion at the interface between a surface-modified metal oxide and an organic solvent using molecular dynamics simulations Peer-reviewed

    Takamasa Saito, Eita Shoji, Masaki Kubo, Takao Tsukada, Gota Kikugawa, Donatas Surblys

    Journal of Chemical Physics　154　(11)　2021/03/21

    DOI： 10.1063/5.0040900 　

    ISSN： 0021-9606

    eISSN： 1089-7690

  16. Compositional Dependence of Thermal Conductivity of Molten Cu-Fe Alloy at Low Fe Contents Peer-reviewed

    Eita Shoji, Naoto Ito, Masaki Kubo, Takao Tsukada, Hiroyuki Fukuyama

    Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science　51　(6)　2504-2509　2020/12

    DOI： 10.1007/s11663-020-01965-y 　

    ISSN： 1073-5615

  17. In-situ visualization of heavy oil behavior in supercritical water using neutron radiography Peer-reviewed

    Eita Shoji, Takahiro Kikuchi, Koshiro Yamagiwa, Masaki Kubo, Takao Tsukada, Seiichi Takami, Katsumi Sugimoto, Daisuke Ito, Yasushi Saito

    Chemical Engineering Science　225　115816-115816　2020/11

    Publisher: Elsevier BV

    DOI： 10.1016/j.ces.2020.115816 　

    ISSN： 0009-2509

  18. Spatial structures formation of surface-modified nanoparticles in polymer nanocomposite thin films Peer-reviewed

    Naoto Kobayashi, Shogo Yagawa, Yusaku Nakamura, Masaki Kubo, Eita Shoji, Takao Tsukada, Tadafumi Adschiri

    Chemical Engineering and Processing - Process Intensification　155　2020/09

    DOI： 10.1016/j.cep.2020.108054 　

    ISSN： 0255-2701

  19. Prediction of surface tension of heavy oil based on principle of corresponding states combined with detailed composition and molecular structure analysis Peer-reviewed

    Yuichi Mukawa, Koshiro Yamagiwa, Eita Shoji, Masaki Kubo, Takao Tsukada, Shogo Teratani, Keita Katano

    Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy　99　(7)　75-81　2020/07/20

    DOI： 10.3775/jie.99.75 　

    ISSN： 0916-8753

  20. Corrigendum to ‘Neutron computed tomography of phase separation structures in solidified Cu-Co alloys and investigation of relationship between the structures and melt convection during solidification’ (Scripta Materialia (2020) 175 (29–32), (S1359646219305263), (10.1016/j.scriptamat.2019.08.041))

    Eita Shoji, Shosei Isogai, Rikuto Suzuki, Masaki Kubo, Takao Tsukada, Tetsuya Kai, Takenao Shinohara, Yoshihiro Matsumoto, Hiroyuki Fukuyama

    Scripta Materialia　178　244　2020/03/15

    Publisher: Acta Materialia Inc

    DOI： 10.1016/j.scriptamat.2019.11.038 　

    ISSN： 1359-6462

  21. In-vacuum electropolymerization of vapor-deposited source molecules into polymer films in ionic liquid Peer-reviewed

    Keisuke Okawara, Tomonobu Nishimura, Shingo Maruyama, Masaki Kubo, Yuji Matsumoto

    Reaction Chemistry & Engineering　5　(1)　33-38　2020

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/c9re00343f 　

    eISSN： 2058-9883

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    <p>A new in-vacuum electropolymerization process combined with vapor-phase deposition using an ionic liquid (IL) has been proposed.</p>

  22. Neutron computed tomography of phase separation structures in solidified Cu[sbnd]Co alloys and investigation of relationship between the structures and melt convection during solidification Peer-reviewed

    Shoji, E., Isogai, S., Suzuki, R., Kubo, M., Tsukada, T., Kai, T., Shinohara, T., Matsumoto, Y., Fukuyama, H.

    Scripta Materialia　175　(15)　29-32　2020/01

    DOI： 10.1016/j.scriptamat.2019.08.041 　

    ISSN： 1359-6462

  23. Numerical Simulation of Structure Formation of Surface-Modified Nanoparticles during Solvent Evaporation Peer-reviewed

    S. Usune, T. Takahashi, M. Kubo, E. Shoji, T. Tsukada, O. Koike, R. Tatsumi, M. Fujita, T. Adschiri

    Journal of Chemical Engineering of Japan　52　(8)　680-693　2019/08

    DOI： 10.1252/jcej.19we012 　

    ISSN： 0021-9592

  24. Numerical Evaluation for Measurement Conditions of Interfacial Tension between Molten Slag and Molten Iron by Oscillating Drop Technique in ISS Peer-reviewed

    Eita SHOJI, Ryuji TAKAHASHI, Naoto ITO, Masaki KUBO, Takao TSUKADA, Masahito WATANABE

    International Journal of Microgravity Science and Application　36　(2)　360200　2019/04

  25. Flow visualization of heavy oil in a packed bed using real-time neutron radiography Peer-reviewed

    Eita Shoji, Koshiro Yamagiwa, Masaki Kubo, Takao Tsukada, Seiichi Takami, Katsumi Sugimoto, Daisuke Ito, Yasushi Saito, Shogo Teratani

    Chemical Engineering Science　196　425-432　2019/03/16

    DOI： 10.1016/j.ces.2018.11.021 　

    ISSN： 0009-2509

  26. Effects of vertical, horizontal and rotational magnetic fields on convection in an electromagnetically levitated droplet Peer-reviewed

    Lin Feng, Wan-Yuan Shi, Eita Shoji, Masaki Kubo, Takao Tsukada

    International Journal of Heat and Mass Transfer　787-796　2019/03

    DOI： 10.1016/j.ijheatmasstransfer.2018.10.101 　

  27. Three-step phase-shifting imaging ellipsometry to measure nanofilm thickness profiles Peer-reviewed

    Eita Shoji, Atsuki Komiya, Junnosuke Okajima, Masaki Kubo, Takao Tsukada

    Optics and Lasers in Engineering　112　145-150　2019/01

    DOI： 10.1016/j.optlaseng.2018.09.005 　

  28. Numerical simulations of dispersion and aggregation behavior of surface-modified nanoparticles under shear flow Peer-reviewed

    Usune S, Kubo M, Tsukada T, Koike O, Tatsumi R, Fujita M, Takami S, Adschiri T

    Powder Technology　343　113-121　2019

    DOI： 10.1016/j.powtec.2018.10.057 　

    ISSN： 0032-5910

    eISSN： 1873-328X

  29. Compositional Dependence of Normal Spectral Emissivity of Molten Cu-Fe Alloy Peer-reviewed

    Shoji, E., Takahashi, R., Isogai, S., Ito, N., Kubo, M., Tsukada, T., Fukuyama, H.

    Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science　2019

    DOI： 10.1007/s11663-019-01638-5 　

  30. Study of SiGe Crystal Growth Interface Processed in Microgravity Peer-reviewed

    Yasutomo Arai, Kyoichi Kinoshita, Takao Tsukada, Masaki Kubo, Keita Abe, Sara Sumioka, Satoshi Baba, Yuko Inatomi

    Crystal Growth and Design　18　(6)　3697-3703　2018/06/06

    Publisher: American Chemical Society

    DOI： 10.1021/acs.cgd.8b00544 　

    ISSN： 1528-7505 1528-7483

    eISSN： 1528-7505

  31. Control of molecular weight distribution in synthesis of poly(2-hydroxyethyl methacrylate) using ultrasonic irradiation Peer-reviewed

    Masaki Kubo, Takayuki Kondo, Hideki Matsui, Naomi Shibasaki-Kitakawa, Toshikuni Yonemoto

    ULTRASONICS SONOCHEMISTRY　40　736-741　2018/01

    DOI： 10.1016/j.ultsonch.2017.08.011 　

    ISSN： 1350-4177

    eISSN： 1873-2828

  32. Synthesis of poly(N-isopropylacrylamide-co-2-hydroxyethyl methacrylate) with low polydispersity using ultrasonic irradiation Peer-reviewed

    Kubo, M., Sone, T., Ohata, M., Tsukada, T.

    Ultrasonics Sonochemistry　49　310-315　2018

    DOI： 10.1016/j.ultsonch.2018.08.022 　

  33. Numerical simulation of dispersion and aggregation behavior of surface-modified nanoparticles in organic solvents Peer-reviewed

    Usune S, Ando M, Kubo M, Tsukada T, Sugioka K.-I, Koike O, Tatsumi R, Fujita M, Takami S, Adschiri T

    Journal of Chemical Engineering of Japan　51　(6)　492-500　2018

    DOI： 10.1252/jcej.17we197 　

    ISSN： 0021-9592

  34. Effect of surface modifier of nanoparticles on dewetting behaviors of polymer nanocomposite thin films Peer-reviewed

    Takumi Kato, Yang Liu, Yuuta Murai, Masaki Kubo, Eita Shoji, Takao Tsukada, Seiichi Takami, Tadafumi Adschiri

    Journal of Chemical Engineering of Japan　51　(3)　282-288　2018

    Publisher: Society of Chemical Engineers, Japan

    DOI： 10.1252/jcej.17we241 　

    ISSN： 0021-9592

  35. Crack formation in polymer nanocomposite thin films containing surface-modified nanoparticles during solution casting Peer-reviewed

    Naoto Kobayashi, Shinji Sakai, Yudai Sasaki, Masaki Kubo, Takao Tsukada, Ken-Ichi Sugioka, Seiichi Takami, Tadafumi Adschiri

    Journal of Chemical Engineering of Japan　51　(5)　460-468　2018

    Publisher: Society of Chemical Engineers, Japan

    DOI： 10.1252/jcej.17we323 　

    ISSN： 0021-9592

  36. Continuous synthesis of ethyl esters from triglycerides using simulated moving bed chromatographic reactor packed with solid acid catalysts Peer-reviewed

    Takuya Fukumura, Ryoma Chiba, Yuya Ono, Masaki Kubo

    Kagaku Kogaku Ronbunshu　44　(3)　177-184　2018

    Publisher: Society of Chemical Engineers, Japan

    DOI： 10.1252/kakoronbunshu.44.177 　

    ISSN： 1349-9203 0386-216X

  37. Thermal Conductivity Measurement of Molten Cu-Co Alloy Using an Electromagnetic Levitator Superimposed with a Static Magnetic Field Peer-reviewed

    Yuki Nakamura, Ryuji Takahashi, Eita Shoji, Masaki Kubo, Takao Tsukada, Masahito Uchikoshi, Hiroyuki Fukuyama

    METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE　48　(6)　3213-3218　2017/12

    DOI： 10.1007/s11663-017-1103-9 　

    ISSN： 1073-5615

    eISSN： 1543-1916

  38. Normal Spectral Emissivity Measurement of Molten Cu-Co Alloy Using an Electromagnetic Levitator Superimposed with a Static Magnetic Field Peer-reviewed

    Shoya Ueno, Yuki Nakamura, Ken-Ichi Sugioka, Masaki Kubo, Takao Tsukada, Masahito Uchikoshi, Hiroyuki Fukuyama

    INTERNATIONAL JOURNAL OF THERMOPHYSICS　38　(2)　16　2017/02

    DOI： 10.1007/s10765-016-2136-z 　

    ISSN： 0195-928X

    eISSN： 1572-9567

  39. Pretreatment combining ultrasound and sodium percarbonate under mild conditions for efficient degradation of corn stover Peer-reviewed

    Kazunori Nakashima, Yuuki Ebi, Masaki Kubo, Naomi Shibasaki-Kitakawa, Toshikuni Yonemoto

    ULTRASONICS SONOCHEMISTRY　29　455-460　2016/03

    DOI： 10.1016/j.ultsonch.2015.10.017 　

    ISSN： 1350-4177

    eISSN： 1873-2828

  40. Relationship between size distribution of synthesized nanoparticles and flow and thermal fields in a flow-type reactor for supercritical hydrothermal synthesis Peer-reviewed

    Ken-ichi Sugioka, Kyohei Ozawa, Masaki Kubo, Takao Tsukada, Seiichi Takami, Tadafumi Adschiri, Katsumi Sugimoto, Nobuyuki Takenaka, Yasushi Saito

    JOURNAL OF SUPERCRITICAL FLUIDS　109　43-50　2016/03

    DOI： 10.1016/j.supflu.2015.11.008 　

    ISSN： 0896-8446

    eISSN： 1872-8162

  41. SiGe Crystal Growth by the Traveling Liquidus-Zone Method aboard the International Space Station Peer-reviewed

    Kyoichi KINOSHITA, Yasutomo ARAI, Yuko INATOMI, Takao TSUKADA, Hiroaki MIYATA, Ryota TANAKA, Keita ABE, Sara SUMIOKA, Masaki KUBO, Satoshi BABA

    International Journal of Microgravity Science and Application　33　(2)　330213　2016

    DOI： 10.15011/ijmsa.33.330213 　

    ISSN： 0915-3616

    eISSN： 2188-9783

  42. Measurement and prediction of surface tension of vacuum distillates and residues from heavy oil Peer-reviewed

    Yuichi Mukawa, Sho Tsujimura, Koshiro Yamagiwa, Masaki Kubo, Takao Tsukada, Shogo Teratani

    Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy　95　(12)　1142-1148　2016

    Publisher: Japan Institute of Energy

    DOI： 10.3775/jie.95.1142 　

    ISSN： 0916-8753

  43. Experimental and theoretical studies on compressive deformation characteristics of particle aggregates in water Peer-reviewed

    Masaki Kubo, Ryutaro Ishibashi, Ken-ichi Sugioka, Takao Tsukada, Osamu Koike, Masahiro Fujita

    POWDER TECHNOLOGY　287　431-438　2016/01

    DOI： 10.1016/j.powtec.2015.10.010 　

    ISSN： 0032-5910

    eISSN： 1873-328X

  44. Effect of Static Magnetic Field on Recalescence and Surface Velocity Field in Electromagnetically Levitated Molten CuCo Droplet in Undercooled State Peer-reviewed

    Tsubasa Kitahara, Koki Tanada, Shoya Ueno, Ken-Ichi Sugioka, Masaki Kubo, Takao Tsukada, Masahito Uchikoshi, Hiroyuki Fukuyama

    METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE　46　(6)　2706-2712　2015/12

    DOI： 10.1007/s11663-015-0441-8 　

    ISSN： 1073-5615

    eISSN： 1543-1916

  45. Annealing-promoted unidirectional migration of organic-modified nanoparticles embedded two-dimensionally in polymer thin films Peer-reviewed

    Yang Liu, Takumi Kato, Masaki Kubo, Ken-Ichi Sugioka, Takao Tsukada, Seiichi Takami, Tadafumi Adschiri

    JOURNAL OF APPLIED POLYMER SCIENCE　132　(45)　42760　2015/12

    DOI： 10.1002/app.42760 　

    ISSN： 0021-8995

    eISSN： 1097-4628

  46. Development of a Global Model of Heat Transfer in the Czochralski Furnace Taking into Account Specular Reflection at the Crystal Surface Peer-reviewed

    Keita Abe, Yuta Nagato, Ken-ichi Sugioka, Masaki Kubo, Takao Tsukada, Shigenao Maruyama

    NUMERICAL HEAT TRANSFER PART A-APPLICATIONS　67　(12)　1311-1323　2015/06

    DOI： 10.1080/10407782.2014.965090 　

    ISSN： 1040-7782

    eISSN： 1521-0634

  47. 国際宇宙ステーションでの液滴振動法による溶融スラグ／溶融鉄界面張力の測定に関する数値解析的検討 Peer-reviewed

    S. UENO, M. KUBO, T. TSUKADA, K. SUGIOKA, M. WATANABE

    Numerical Investigation for Measuring Molten Slag/Molten iron Interfacial Tension by an Oscillating Drop Technique in the International Space Station　32　320408　2015

  48. Numerical simulations of SiGe crystal growth by the traveling liquidus-zone method in a microgravity environment Peer-reviewed

    K. Abe, S. Sumioka, K. -I. Sugioka, M. Kubo, T. Tsukada, K. Kinoshita, Y. Arai, Y. Inatomi

    JOURNAL OF CRYSTAL GROWTH　402　71-77　2014/09

    DOI： 10.1016/j.jcrysgro.2014.05.007 　

    ISSN： 0022-0248

    eISSN： 1873-5002

  49. Study on the Effect of Melt Convection on Phase Separation Structures in Undercooled CuCo Alloys Using an Electromagnetic Levitator Superimposed with a Static Magnetic Field Peer-reviewed

    Ken-ichi Sugioka, Takamitsu Inoue, Tsubasa Kitahara, Ryo Kurosawa, Masaki Kubo, Takao Tsukada, Masahito Uchikoshi, Hiroyuki Fukuyama

    METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE　45　(4)　1439-1445　2014/08

    DOI： 10.1007/s11663-014-0052-9 　

    ISSN： 1073-5615

    eISSN： 1543-1916

  50. Thermal Dewetting Behavior of Polystyrene Composite Thin Films with Organic-Modified Inorganic Nanoparticles Peer-reviewed

    Masaki Kubo, Yosuke Takahashi, Takeshi Fujii, Yang Liu, Ken-ichi Sugioka, Takao Tsukada, Kimitaka Minami, Tadafumi Adschiri

    LANGMUIR　30　(29)　8956-8964　2014/07

    DOI： 10.1021/la502009x 　

    ISSN： 0743-7463

  51. P8 Ultrasonic Synthesis of Temperature-Responsive Copolymer and its Characterization(Poster Session)

    Sone Takuya, Kubo Masaki, Sugioka Ken-ichi, Tsukada Takao

    Proceedings of the Annual Meeting of the Japan Society of Sonochemistry　23　45-46　2014

    Publisher: The Japan Society of Sonochemistry

    DOI： 10.20577/pamjss.23.0_45 　

    More details Close

    Poly (N-Isopropylacrylamide-co-2-hydroxyethyl methacrylate) (P(NIPAM-co-HEMA)) was synthesized using ultrasonic irradiation in a mixed solvent of water and ethanol without chemical initiator. Effect of monomer molar ratio on time courses of conversion to polymer, number average molecular weight, and polydispersity of synthesized polymers were investigated in order to determine the optimum conditions to synthesize the temperature-responsive polymer with low molecular weight distribution (i.e., low polydispersity). The higher the ratio of NIPAM to HEMA, the higher the polymerization rate because ethanol acts as a scavenger in radical polymerization. The higher ratio of NIPAM also resulted in faster polymer degradation. Copolymers with low polydispersity were obtained at any monomer molar ratio. The transmittance of aqueous solutions of copolymers synthesized with various monomer molar ratios decreased abruptly at a critical temperature which depends on the monomer molar ratio. The lower the ratio of NIPAM, the lower the critical value (LCST) because NIPAM is less hydrophobic than HEMA.

  52. Production of human secreted alkaline phosphatase in suspension and immobilization cultures of tobacco NT1 cell Peer-reviewed

    Kazunori Nakashima, Naomi Shibasaki-Kitakawa, Takuya Miyamoto, Masaki Kubo, Toshikuni Yonemoto, Michael L. Shuler

    BIOCHEMICAL ENGINEERING JOURNAL　77　177-182　2013/08

    DOI： 10.1016/j.bej.2013.06.004 　

    ISSN： 1369-703X

  53. P26 Ultrasonic Synthesis of Poly (N-Isopropylacrylamide-co-2-Hydroxyethyl Methacrylate)(Poster Session)

    Ohata Masahiro, Kubo Masaki, Sugioka Ken-ichi, Tsukada Takao

    Proceedings of the Annual Meeting of the Japan Society of Sonochemistry　22　73-74　2013

    Publisher: The Japan Society of Sonochemistry

    DOI： 10.20577/pamjss.22.0_73 　

    More details Close

    Poly (N-Isopropylacrylamide-co-2-hydroxyethyl methacrylate) (P(NIPAAm-co-HEMA)) was synthesized using ultrasonic irradiation without chemical initiator in the mixed solvent of water and ethanol. Effects of solvent composition, monomer molar ratio, and reaction temperature on time course of conversion to polymer, number average molecular weight, and polydispersity were investigated in order to synthesize the polymer with low molecular weight distribution (i.e., low polydispersity). Lower ethanol composition of solvent resulted in higher conversion to polymer, faster decrease of molecular weight, and lower polydispersity. Ethanol acts as a scavenger for radical polymerization, so that higher ethanol composition decreases the polymerization rate. Faster polymerization rate gives faster generation of polymer, and faster degradation of generated polymer, which resulted in faster decrease of molecular weight and lower polydispersity. Higher NIPAAm ratio resulted in higher polymerization rate, faster polymer degradation rate, and lower polydispersity. In the case of the homopolymer of PNIPAAm and PHEMA, PNIPAAm radical has lower reaction activity with ethanol than PHEMA radical, so that PNIPAAm polymerizes faster than PHEMA. Reaction temperature slightly affected the reaction rate. Temperature dependence of polymerization is positive but that of radical formation is negative, and the effect of those two factors might be almost same.

  54. RADIATION HEAT TRANSFER ANALYSIS IN A SEMITRANSPARENT SINGLE CRYSTAL WITH SPECULAR SURFACES: APPLICATION OF REM2 Peer-reviewed

    Keita Abe, Ken-ichi Sugioka, Masaki Kubo, Takao Tsukada, Shigenao Maruyama

    NUMERICAL HEAT TRANSFER PART A-APPLICATIONS　63　(1)　1-13　2013

    DOI： 10.1080/10407782.2012.725008 　

    ISSN： 1040-7782

  55. Normal spectral emissivity measurement of molten copper using an electromagnetic levitator superimposed with a static magnetic field Peer-reviewed

    Ryo Kurosawa, Takamitsu Inoue, Yuya Baba, Ken-ichi Sugioka, Masaki Kubo, Takao Tsukada, Hiroyuki Fukuyama

    MEASUREMENT SCIENCE AND TECHNOLOGY　24　(1)　015603　2013/01

    DOI： 10.1088/0957-0233/24/1/015603 　

    ISSN： 0957-0233

    eISSN： 1361-6501

  56. Aggregation of growing crystals in suspension Peer-reviewed

    M. J. Hounslow, E. J.W. Wynn, Masaki Kubo, K. Pitt

    Chemical Engineering Science　101　731-743　2013

    Publisher: Elsevier Ltd

    DOI： 10.1016/j.ces.2013.06.058 　

    ISSN： 0009-2509

  57. Kinetic model for formation of DMPO-OH in water under ultrasonic irradiation using EPR spin trapping method Peer-reviewed

    Masaki Kubo, Kazuhiro Sekiguchi, Naomi Shibasaki-Kitakawa, Toshikuni Yonemoto

    RESEARCH ON CHEMICAL INTERMEDIATES　38　(9)　2191-2204　2012/11

    DOI： 10.1007/s11164-012-0536-7 　

    ISSN： 0922-6168

  58. A Kinetic Model Describing Antioxidation and Prooxidation of beta-Carotene in the Presence of alpha-Tocopherol and Ascorbic Acid Peer-reviewed

    Naomi Shibasaki-Kitakawa, Masahiko Murakami, Masaki Kubo, Toshikuni Yonemoto

    JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY　89　(5)　815-824　2012/05

    DOI： 10.1007/s11746-011-1980-z 　

    ISSN： 0003-021X

  59. Thermal conductivity measurement of molten copper using an electromagnetic levitator superimposed with a static magnetic field Peer-reviewed

    Yuya Baba, Takamitsu Inoue, Ken-ichi Sugioka, Hidekazu Kobatake, Hiroyuki Fukuyama, Masaki Kubo, Takao Tsukada

    MEASUREMENT SCIENCE AND TECHNOLOGY　23　(4)　045103　2012/04

    DOI： 10.1088/0957-0233/23/4/045103 　

    ISSN： 0957-0233

    eISSN： 1361-6501

  60. Biodiesel Production from Waste Cooking Oil Using Anion-Exchange Resin as Both Catalyst and Adsorbent Peer-reviewed

    Naomi Shibasaki-Kitakawa, Takahiro Tsuji, Masaki Kubo, Toshikuni Yonemoto

    BIOENERGY RESEARCH　4　(4)　287-293　2011/12

    DOI： 10.1007/s12155-011-9148-0 　

    ISSN： 1939-1234

  61. Relationship between Applied Static Magnetic Field Strength and Thermal Conductivity Values of Molten Materials Measured Using the EML Technique Peer-reviewed

    Yuya Baba, Ken-ichi Sugioka, Masaki Kubo, Takao Tsukada, Kazutoshi Sugie, Hidekazu Kobatake, Hiroyuki Fukuyama

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN　44　(5)　321-327　2011

    DOI： 10.1252/jcej.11we035 　

    ISSN： 0021-9592

  62. Reaction kinetics of D-xylose in sub- and supercritical water Peer-reviewed

    Taku Michael Aida, Naohiro Shiraishi, Masaki Kubo, Masaru Watanabe, Richard L. Smith

    JOURNAL OF SUPERCRITICAL FLUIDS　55　(1)　208-216　2010/11

    DOI： 10.1016/j.supflu.2010.08.013 　

    ISSN： 0896-8446

    eISSN： 1872-8162

  63. Rigorous kinetic model considering positional specificity of lipase for enzymatic stepwise hydrolysis of triolein in biphasic oil-water system Peer-reviewed

    Heri Hermansyah, Anondho Wijanarko, Masaki Kubo, Naomi Shibasaki-Kitakawa, Toshikuni Yonemoto

    BIOPROCESS AND BIOSYSTEMS ENGINEERING　33　(7)　787-796　2010/09

    DOI： 10.1007/s00449-009-0400-3 　

    ISSN： 1615-7591

  64. Simple Continuous Production Process of Biodiesel Fuel from Oil with High Content of Free Fatty Acid Using Ion-Exchange Resin Catalysts Peer-reviewed

    Naomi Shibasaki-Kitakawa, Takahiro Tsuji, Kouhei Chida, Masaki Kubo, Toshikuni Yonemoto

    ENERGY & FUELS　24　(6)　3634-3638　2010/06

    DOI： 10.1021/ef100109u 　

    ISSN： 0887-0624

    eISSN： 1520-5029

  65. Production of high quality biodiesel fuel from waste cooking oil using anion-exchange resin catalyst

    Naomi Shibasaki-Kitakawa, Takahiro Tsuji, Masaki Kubo, Toshikuni Yonemoto

    AIChE Annual Meeting, Conference Proceedings　2010

  66. Controlling molecular weight of poly(2- hydroxyethyl methacrylate) with keeping low dispersity

    Masaki Kubo, Takayuki Kondo, Hideki Matsui, Naomi Shibasaki-Kitakawa, Toshikuni Yonemoto

    AIChE Annual Meeting, Conference Proceedings　2010

  67. Is Excess Methanol Addition Required To Drive Transesterification of Triglyceride toward Complete Conversion? Peer-reviewed

    Takahiro Tsuji, Masaki Kubo, Naomi Shibasaki-Kitakawa, Toshikuni Yonemoto

    ENERGY & FUELS　23　(12)　6163-6167　2009/12

    DOI： 10.1021/ef900622d 　

    ISSN： 0887-0624

    eISSN： 1520-5029

  68. Catalytic Synthesis of Glycerol Monoacetate Using a Continuous Expanded Bed Column Reactor Packed with Cation-Exchange Resin Peer-reviewed

    Takuya Fukumura, Takuji Toda, Yuichiro Seki, Masaki Kubo, Naomi Shibasaki-Kitakawa, Toshikuni Yonemoto

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH　48　(4)　1816-1823　2009/02

    DOI： 10.1021/ie800625g 　

    ISSN： 0888-5885

  69. Kinetics of Solvent-Free C-Alkylation of Phenylacetonitrile Using Ultrasonic Irradiation Peer-reviewed

    Masaki Kubo, Koji Mura, Toshikuni Yonemoto

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN　41　(11)　1031-1036　2008/11

    DOI： 10.1252/jcej.07we242 　

    ISSN： 0021-9592

  70. Kinetics of ultrasonic degradation of phenol in the presence of composite particles of titanium dioxide and activated carbon Peer-reviewed

    Masaki Kubo, Hiroto Fukuda, Xin Juan Chua, Toshikuni Yonemoto

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH　46　(3)　699-704　2007/01

    DOI： 10.1021/ie0607999 　

    ISSN： 0888-5885

  71. Mathematical model for stepwise hydrolysis of triolein using Candida rugosa lipase in biphasic oil-water system Peer-reviewed

    Heri Hermansyah, Masaki Kubo, Naomi Shibasaki-Kitakawa, Toshikuni Yonemoto

    BIOCHEMICAL ENGINEERING JOURNAL　31　(2)　125-132　2006/09

    DOI： 10.1016/j.bej.2006.06.003 　

    ISSN： 1369-703X

  72. Synthesis of submicron-sized titania-coated silica particles with a sol-gel method and their application to colloidal photonic crystals Peer-reviewed

    E Mine, M Hirose, M Kubo, Y Kobayashi, D Nagao, M Konno

    JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY　38　(1)　91-95　2006/04

    DOI： 10.1007/s10971-006-5855-y 　

    ISSN： 0928-0707

  73. Complete isolation of target solute from multicomponent similar mixture using continuous rotating annular chromatograph with double-stage partial recycling of effluent Peer-reviewed

    T Fukumura, H Honda, M Kubo, T Yonemoto

    JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY　80　(6)　712-720　2005/06

    DOI： 10.1002/jctb.1252 　

    ISSN： 0268-2575

  74. Kinetics of ultrasonic disinfection of Escherichia coli in the presence of titanium dioxide particles Peer-reviewed

    M Kubo, R Onodera, N Shibasaki-Kitakawa, K Tsumoto, T Yonemoto

    BIOTECHNOLOGY PROGRESS　21　(3)　897-901　2005/05

    DOI： 10.1021/bp049729s 　

    ISSN： 8756-7938

  75. Aggregation behavior of latex particles in shear flow confined between two parallel plates Peer-reviewed

    Y Kikuchi, H Yamada, H Kunimori, T Tsukada, M Hozawa, C Yokoyama, M Kubo

    LANGMUIR　21　(8)　3273-3278　2005/04

    DOI： 10.1021/la048011j 　

    ISSN： 0743-7463

  76. Kinetics of ultrasonic degradation of phenol in the presence of TiO2 particles Peer-reviewed

    M Kubo, K Matsuoka, A Takahashi, N Shibasaki-Kitakawa, T Yonemoto

    ULTRASONICS SONOCHEMISTRY　12　(4)　263-269　2005/03

    DOI： 10.1016/j.ultsonch.2004.01.039 　

    ISSN： 1350-4177

  77. Phase-separation behavior in a binary mixture fluid layer subjected to a vertical temperature gradient Peer-reviewed

    Y Seki, T Okabe, Y Oshida, M Kobayashi, T Tsukada, M Hozawa, M Kubo

    CHEMICAL ENGINEERING SCIENCE　59　(13)　2685-2693　2004/07

    DOI： 10.1016/j.ces.2004.04.008 　

    ISSN： 0009-2509

  78. Synthesis of monodispersed nano size titania particles by alkoxide method in the presence of hydroxypropylcellulose Peer-reviewed

    M Kubo, T Kasahara, H Takeda, T Yonemoto

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN　37　(6)　785-790　2004/06

    DOI： 10.1252/jcej.37.785 　

    ISSN： 0021-9592

  79. Simultaneous isolation and concentration of target solute from multicomponent mixture using continuous rotating annular chromatograph with double-stage partial recycling of effluent Peer-reviewed

    T Fukumura, M Kubo, T Yonemoto

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN　37　(2)　261-266　2004/02

    DOI： 10.1252/jcej.37.261 　

    ISSN： 0021-9592

  80. Numerical analysis for photothermal poling process of nonlinear optical polymer film Peer-reviewed

    H Kobayashi, M Kubo, T Tsukada, M Hozawa

    INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER　45　(4)　865-875　2002/02

    DOI： 10.1016/S0017-9310(01)00156-9 　

    ISSN： 0017-9310

  81. Modeling of the formation kinetics of polyurea microcapsules wit size distribution by interfacial polycondensation Peer-reviewed

    M Kubo, Y Harada, T Kawakatsu, T Yonemoto

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN　34　(12)　1506-1515　2001/12

    DOI： 10.1252/jcej.34.1506 　

    ISSN： 0021-9592

  82. Measurement of thermal diffusivity of nonlinear optical polymer thin films using photoacoustic method Peer-reviewed

    H Kobayashi, K Yoshida, M Kubo, T Tsukada, M Hozawa, M Sato

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN　33　(6)　918-922　2000/12

    DOI： 10.1252/jcej.33.918 　

    ISSN： 0021-9592

  83. Continuous synthesis of TiO2 fine particles and increase of particle size using a two-stage slug flow tubular reactor Peer-reviewed

    M Kubo, T Yonemoto

    CHEMICAL ENGINEERING RESEARCH & DESIGN　77　(A4)　335-341　1999/06

    DOI： 10.1205/026387699526278 　

    ISSN： 0263-8762

  84. Modelling of continuous synthesis process of TiO2 particles using slug flow tubular reactor Peer-reviewed

    M Kubo, T Kawakatsu, T Yonemoto

    CHEMICAL ENGINEERING RESEARCH & DESIGN　76　(A6)　669-676　1998/09

    DOI： 10.1205/026387698525379 　

    ISSN： 0263-8762

  85. Continuous synthesis of titanium dioxide fine particles using a slug flow ageing tube reactor Peer-reviewed

    T Yonemoto, M Kubo, T Doi, T Tadaki

    CHEMICAL ENGINEERING RESEARCH & DESIGN　75　(A4)　413-419　1997/05

    DOI： 10.1205/026387697523877 　

    ISSN： 0263-8762

Show all ︎Show first 5

Misc. 15

  1. 超音波照射による温度応答性ポリマーの分解と温度応答性の制御

    久保正樹

    超音波テクノ　36　(4)　42-45　2024/07

  2. 超音波を活用したコポリマーの構造制御に基づく新規な特性改質・制御法の開拓

    久保正樹

    超音波テクノ　34　(5)　9-13　2022/09

  3. 表面修飾無機ナノ粒子の分散・凝集挙動に関する数値シミュレーション

    久保正樹, 塚田隆夫

    無機マテリアル　29　(7)　237-243　2022/07

  4. 超音波を用いた温度応答性コポリマーの応答特性の制御

    久保正樹

    超音波テクノ　33　(10)　40-43　2021/10

  5. 超音波を活用したポリマーの合成と特性制御

    久保正樹

    化学工業　72　(7)　480-485　2021/07

  6. 超音波を活用した合成技術の進展と展望

    久保正樹

    化学工学　85　(4)　221-223　2021/04

  7. 表面修飾ナノ粒子デザインのための分散・凝集挙動に関する数値シミュレーション

    久保正樹, 塚田隆夫

    セラミックス　55　(1)　23-26　2020/01

  8. 超音波を用いた低分散度感温性コポリマーの合成

    久保正樹

    超音波テクノ　31　(5)　38-41　2019/09

  9. 超音波を用いたラジカル重合によるポリマー合成の速度論

    久保正樹

    日本ソノケミストリー学会誌　11　(2)　6-14　2017/11

  10. 東北大学大学院工学研究科化学工学専攻反応プロセス工学研究室

    米本 年邦, 北川 尚美, 久保 正樹

    化学工学 = Chemical engineering　73　(9)　445-445　2009/09/05

    ISSN： 0375-9253

  11. 酸化チタン存在下における超音波照射による有機物分解・大腸菌殺菌

    久保正樹, 米本年邦

    超音波テクノ　21　(3)　41-45　2009/06/01

    Publisher: 日本工業出版

  12. 酸化チタン存在下における有機物超音波分解・大腸菌超音波殺菌の速度論

    久保正樹, 米本年邦

    化学工学　72　(11)　645-647　2008/11

    Publisher: 化学工学会

  13. パソコンで化学実験をしよう -大学一年生によるバ-チャル化学実験ソフトウェアの開発-

    Masaki Kubo, Toshikuni Yonemoto

    Chemistry and Education　49　(11)　748-749　2001/11

    Publisher: 公益社団法人 日本化学会

    DOI： 10.20665/kakyoshi.49.11_748 　

  14. Effect of Gravity on Pattern Formation in Binary Fluid Mixture

    OKABE Takahiro, OHSHIDA Yoshihiro, KOBAYASHI Masaki, KUBO Masaki, TSUKADA Takao, HOZAWA Mitsunori

    18　46-46　2001/10/01

    ISSN： 0915-3616

  15. Preparation of Microcapsules Containing Biological Materials

    Masaki Kubo, Toshikuni Yonemoto

    Powder Science & Engineering　32　(11)　53-60　2000/11

    Publisher: 粉体と工業社

    ISSN： 0287-6280

Show all ︎Show first 5

Books and Other Publications 3

  1. 分離技術シリーズ「分離技術への超音波の応用展開」

    久保正樹

    分離技術会　2020/04

  2. 中性子イメージングの高度化

    齊藤泰司, 伊藤大介, 浅野等, 村川英樹, 杉本勝美, 塚田隆夫, 庄司衛太, 久保正樹, 梅川尚嗣, 松本亮介, 網健行, 山形豊, 森田晋也, 松嶋卯月, 沼尾達弥, 原田隆郎, 酒井卓郎, 松林征仁, 兼松学, 水田敬, 玉置昌義, 辻義之, 高見誠一

    2019/01

  3. ゾル－ゲル法によるマイクロカプセルのつくり方

    久保正樹, 米本年邦

    2003/07

Presentations 81

  1. ナノフルイド液滴蒸発時の動的濡れと堆積ナノ粒子層の光学測定

    庄司衛太, 齋藤大河, 琵琶哲志, 久保正樹, 塚田隆夫, 笘居高明, 阿尻雅文

    化学工学会秋季大会研究発表講演要旨集(CD-ROM)　2021

  2. 中性子ラジオグラフィを用いた超臨界水中の重質油流動の可視化

    庄司衛太, 菊池隆寛, 山際幸士郎, 久保正樹, 塚田隆夫, 高見誠一, 杉本勝美, 伊藤大介, 齊藤泰司

    化学工学会年会研究発表講演要旨集(CD-ROM)　2020

  3. コンポジット薄膜のdewetting挙動に及ぼすナノ粒子の表面修飾鎖の影響

    加藤巧, 劉洋, 村井優太, 久保正樹, 庄司衛太, 塚田隆夫, 高見誠一, 阿尻雅文

    化学工学会年会研究発表講演要旨集(CD-ROM)　2020

  4. 高分子ナノコンポジット薄膜表面の相分離構造に及ぼす溶媒とナノ粒子の親和性の影響

    小平修, 矢川省吾, 小林直登, 久保正樹, 庄司衛太, 塚田隆夫, 阿尻雅文

    化学工学会大会(Web)　2019

  5. せん断流中における表面修飾ナノ粒子含有ナノフルイドのレオロジー特性の数値解析

    豊田慎一郎, 薄根真, 久保正樹, 庄司衛太, 塚田隆夫, 小池修, 辰巳怜, 藤田昌大, 阿尻雅文

    化学工学会大会(Web)　2019

  6. 溶媒蒸発に伴う表面修飾ナノ粒子系の構造形成に及ぼす溶媒と修飾鎖の影響の数値解析

    薄根真, 高橋太郎, 久保正樹, 庄司衛太, 塚田隆夫, 小池修, 辰巳怜, 藤田昌大, 阿尻雅文

    化学工学会年会研究発表講演要旨集(CD-ROM)　2019

  7. 中性子CTによるCu-Co合金の三次元相分離構造の観察および相分離構造-融体内対流の相関

    庄司衛太, 磯谷祥世, 鈴木陸人, 久保正樹, 塚田隆夫, 甲斐哲也, 篠原武尚, 松本吉弘, TREMSIN Anton, 福山博之

    化学工学会年会研究発表講演要旨集(CD-ROM)　2019

  8. 溶液キャスト法により作製した高分子ナノコンポジット薄膜中のナノ粒子の構造形成

    小林直登, 中村優作, 久保正樹, 庄司衛太, 塚田隆夫, 阿尻雅文

    化学工学会秋季大会研究発表講演要旨集(CD-ROM)　2018

  9. 溶媒蒸発に伴う表面修飾ナノ粒子の構造形成機構の数値解析

    薄根真, 高橋太郎, 久保正樹, 庄司衛太, 塚田隆夫, 小池修, 辰巳怜, 藤田昌大, 阿尻雅文

    日本伝熱シンポジウム講演論文集(CD-ROM)　2018

  10. 高濃度ナノ粒子分散液の溶媒蒸発に伴うナノ粒子系構造形成過程の数値解析

    久保正樹, 薄根真, 高橋太郎, 庄司衛太, 塚田隆夫, 小池修, 辰巳怜, 藤田昌大, 阿尻雅文

    日本セラミックス協会秋季シンポジウム講演予稿集(CD-ROM)　2018

  11. 中性子ラジオグラフィを用いた充填層反応器内の重質油の流動挙動の可視化

    山際幸士郎, 庄司衛太, 久保正樹, 塚田隆夫, 高見誠一, 杉本勝美, 齊藤泰司, 伊藤大介

    化学工学会年会研究発表講演要旨集(CD-ROM)　2018

  12. 充填層型反応器内の重質油流動挙動の中性子ラジオグラフィによるin situ観察

    山際幸士郎, 磯谷祥世, 庄司衛太, 久保正樹, 塚田隆夫, 高見誠一, 杉本勝美, 齊藤泰司, 伊藤大介

    石油・石油化学討論会講演要旨　2018

  13. ナノコンポジット薄膜のクラック形態,高分子分子量及び薄膜構造の相関

    小林直登, 中村優作, 久保正樹, 庄司衛太, 塚田隆夫, 阿尻雅文

    化学工学会秋季大会研究発表講演要旨集(CD-ROM)　2017

  14. 溶媒蒸発に伴う表面修飾ナノ粒子の構造形成に関する数値シミュレーション

    高橋太郎, 薄根真, 久保正樹, 庄司衛太, 塚田隆夫, 小池修, 辰巳怜, 藤田昌大, 阿尻雅文

    化学工学会秋季大会研究発表講演要旨集(CD-ROM)　2017

  15. 高分子コンポジット薄膜の熱dewetting挙動に及ぼす薄膜表面ナノ粒子凝集構造の影響

    加藤巧, 劉洋, 久保正樹, 塚田隆夫, 高見誠一, 阿尻雅文

    化学工学会年会研究発表講演要旨集(CD-ROM)　2016

  16. 数値シミュレーションによるナノフルイドの設計及びそのレオロジー特性評価

    久保正樹, 薄根真, 塚田隆夫, 小池修, 藤田昌大, 阿尻雅文

    日本セラミックス協会秋季シンポジウム講演予稿集(CD-ROM)　2016

  17. 熱アニーリングによる高分子ナノコンポジット薄膜の構造変化に及ぼす分子量の影響

    村井優太, 劉洋, 久保正樹, 庄司衛太, 塚田隆夫, 高見誠一, 阿尻雅文

    化学工学会大会(Web)　2016

  18. 有機修飾ナノ粒子を含むナノ流体の分散・凝集挙動ならびにレオロジー特性の数値シミュレーション

    薄根真, 久保正樹, 塚田隆夫, 杉岡健一, 小池修, 藤田昌大, 阿尻雅文

    日本伝熱シンポジウム講演論文集(CD-ROM)　2016

  19. 高分子ナノコンポジット薄膜内の有機修飾ナノ粒子の空間構造に及ぼすthermal annealingの影響

    LIU Yang, 加藤巧, 村井優太, 久保正樹, 塚田隆夫, 高見誠一, 阿尻雅文

    日本伝熱シンポジウム講演論文集(CD-ROM)　2016

  20. P01 Control of Composition and Responsive Temperature of Copolymer of Ultrasonic Synthesis of Temperature-Responsive Copolymer

    Koshimura Tomoyuki, Sone Takuya, Kubo Masaki, Tsukada Takao

    Proceedings of the Annual Meeting of the Japan Society of Sonochemistry　2016

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    Poly (N-Isopropylacrylamide-co-2-hydroxyethyl methacrylate) (P(NIPAM-co-HEMA)) wassynthesized using ultrasonic irradiation in a mixed solvent of water and ethanol without chemical initiator. Theeffects of monomer molar ratio and ultrasonic intensity on time courses of molar fraction of NIPAM andresponsive temperature of synthesized polymers were investigated. In the early stage of the reaction, NIPAMfraction of copolymer was low, that is, the polymerization rate of HEMA is high. This is because the radicalstability of HEMA is higher than that of NIPAM. The relationship between conversion and molar fraction ofNIPAM did not depend on the ultrasound intensity. The lower the ratio of NIPAM, the lower the critical value(LCST) because HEMA is more hydrophobic than NIPAM. The higher polymerization rate resulted in the higherLCST. Those results suggested that the composition and responsive temperature of the copolymer can becontrolled by changing the irradiation time and the ultrasound intensity.

  21. ナノ粒子/高分子コンポジット薄膜のthermal dewetting挙動に及ぼすナノ粒子空間構造の影響

    加藤巧, LIU Yang, 久保正樹, 杉岡健一, 塚田隆夫, 高見誠一, 阿尻雅文

    日本伝熱シンポジウム講演論文集(CD-ROM)　2015

  22. ナノ粒子/高分子コンポジット薄膜のクラック形成に及ぼす溶媒蒸発条件の影響

    小林直登, 坂井慎次, 久保正樹, 杉岡健一, 塚田隆夫, 高見誠一, 阿尻雅文

    化学工学会秋季大会研究発表講演要旨集(CD-ROM)　2015

  23. 高分子コンポジット薄膜中のナノ粒子分散・凝集構造と薄膜の熱dewetting挙動との相関

    久保正樹, 加藤巧, 劉洋, 杉岡健一, 塚田隆夫, 高見誠一, 阿尻雅文

    化学工学会年会研究発表講演要旨集(CD-ROM)　2015

  24. せん断流中における表面修飾無機ナノ粒子の分散・凝集挙動の数値シミュレーション

    薄根真, 久保正樹, 杉岡健一, 塚田隆夫, 小池修, 藤田昌大, 阿尻雅文

    化学工学会年会研究発表講演要旨集(CD-ROM)　2015

  25. A08 Reaction kinetic analysis of ultrasonic synthesis process of temperature-responsive copolymer

    Kubo Masaki, Sone Takuya, Tsukada Takao

    Proceedings of the Annual Meeting of the Japan Society of Sonochemistry　2015

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    Poly (N-Isopropylacrylamide-co-2-hydroxyethyl methacrylate) (P(NIPAM-co-HEMA)) was synthesized using ultrasonic irradiation in a mixed solvent of water and ethanol without chemical initiator. Effect of ultrasonic intensity on time courses of conversion ratio, copolymer composition, number average molecular weight, and polydispersity of synthesized polymers was investigated in order to clarify the reaction mechanism of radical copolymerization of temperature-responsive polymer with low molecular weight distribution (i.e., low polydispersity). The reaction kinetic model for ultrasonic synthesis process of P(NIPAM-co-HEMA) was constructed with considering the cross-propagation reaction and cross-termination reaction in the radical copolymerization of NIPAM and HEMA. The experimental results showed that PNIPAM fraction of the copolymer in the early stage was lower than initial NIPAM fraction. Those results suggested that HEMA terminated radical was more stable than NIPAM terminated radical so that consumption rate of NIPAM was slower than that of HEMA. The calculated results supported that the cross propagation reaction between HEMA terminated radical and NIPAM monomer was much slower than that between NIPAM terminated radical and HEMA monomer.

  26. ISSにおけるTLZ法によるSiGe結晶成長時の偏析現象の数値シミュレーション

    馬場嵯登史, 阿部敬太, 住岡沙羅, 久保正樹, 塚田隆夫, 木下恭一, 荒井康智, 稲富裕光

    結晶成長国内会議予稿集(CD-ROM)　2015

  27. 微小重力下でTLZ法により育成したSiGe結晶分析

    荒井康智, 木下恭一, 阿部敬太, 住岡沙羅, 久保正樹, 塚田隆夫, 馬場嵯登史, 稲富裕光

    結晶成長国内会議予稿集(CD-ROM)　2015

  28. Activity Report of Research Group on Bulk Crystal Growth

    Hayakawa Yasuhiro, Inatomi Yuko, Okano Yasunori, Arafune Kouji, Arivanandhan Mukannan, Ozawa Tetsuo, Kinosita Kyouichi, Arai Yasukoto, Tsukada Takao, Kubo Masaki, Sugioka Kenich

    2015/01

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    Space Utilization Research (January 24-25, 2015. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)), Sagamihara, Kanagawa Japan

  29. 流通式超臨界水熱合成反応器内の熱流動場と生成ナノ粒子の粒径分布との相関

    杉岡健一, 小澤恭兵, 高見誠一, 久保正樹, 塚田隆夫, 阿尻雅文, 杉本勝美, 竹中信幸

    日本伝熱シンポジウム講演論文集(CD-ROM)　2014

  30. 有機修飾無機ナノ粒子の分散・凝集挙動に関する数値計算

    久保正樹, 安藤宗弘, 杉岡健一, 塚田隆夫, 小池修, 藤田昌大, 高見誠一, 阿尻雅文

    化学工学会年会研究発表講演要旨集(CD-ROM)　2014

  31. 流通式超臨界水熱合成反応器内の熱流動場と生成ナノ粒子の粒径分布との相関

    杉岡健一, 小澤恭兵, 高見誠一, 久保正樹, 塚田隆夫, 阿尻雅文, 竹中信幸

    化学工学会年会研究発表講演要旨集(CD-ROM)　2014

  32. 熱アニーリングによる高分子ナノコンポジット薄膜内2次元配列ナノ粒子の一方向移動

    劉洋, 加藤巧, 久保正樹, 杉岡健一, 塚田隆夫, 高見誠一, 阿尻雅文

    化学工学会秋季大会研究発表講演要旨集(CD-ROM)　2014

  33. 有機溶媒中における表面修飾無機ナノ粒子の分散・凝集挙動の数値シミュレーション

    安藤宗弘, 久保正樹, 杉岡健一, 塚田隆夫, 小池修, 藤田昌大, 阿尻雅文

    化学工学会年会研究発表講演要旨集(CD-ROM)　2014

  34. 超臨界水熱法によるナノ粒子合成プロセスにおける熱流動場の可視化と解析-中性子ラジオグラフィと数値シミュレーションを利用して-

    塚田隆夫, 高見誠一, 杉岡健一, 久保正樹, 阿尻雅文, 杉本勝美, 竹中信幸, 齊藤泰司

    結晶成長国内会議予稿集(CD-ROM)　2014

  35. P8 Ultrasonic Synthesis of Temperature-Responsive Copolymer and its Characterization(Poster Session)

    Sone Takuya, Kubo Masaki, Sugioka Ken-ichi, Tsukada Takao

    Proceedings of the Annual Meeting of the Japan Society of Sonochemistry　2014

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    Poly (N-Isopropylacrylamide-co-2-hydroxyethyl methacrylate) (P(NIPAM-co-HEMA)) was synthesized using ultrasonic irradiation in a mixed solvent of water and ethanol without chemical initiator. Effect of monomer molar ratio on time courses of conversion to polymer, number average molecular weight, and polydispersity of synthesized polymers were investigated in order to determine the optimum conditions to synthesize the temperature-responsive polymer with low molecular weight distribution (i.e., low polydispersity). The higher the ratio of NIPAM to HEMA, the higher the polymerization rate because ethanol acts as a scavenger in radical polymerization. The higher ratio of NIPAM also resulted in faster polymer degradation. Copolymers with low polydispersity were obtained at any monomer molar ratio. The transmittance of aqueous solutions of copolymers synthesized with various monomer molar ratios decreased abruptly at a critical temperature which depends on the monomer molar ratio. The lower the ratio of NIPAM, the lower the critical value (LCST) because NIPAM is less hydrophobic than HEMA.

  36. 微小重力下でのTLZ法によるSiGe結晶成長プロセスの数値解析並びに結晶内組成均一化条件の提案

    阿部敬太, 住岡沙羅, 杉岡健一, 久保正樹, 塚田隆夫, 木下恭一, 荒井康智, 稲富裕光

    日本伝熱シンポジウム講演論文集(CD-ROM)　2014

  37. 微小重力下でTLZ法により成長したSiGe結晶の軸方向・径方向組成分布の数値シミュレーション

    住岡沙羅, 阿部敬太, 杉岡健一, 久保正樹, 塚田隆夫, 木下恭一, 荒井泰智, 稲富裕光

    結晶成長国内会議予稿集(CD-ROM)　2014

  38. 微小重力環境下におけるTLZ法による均一組成SiGe結晶成長条件の数値解析的検討

    住岡沙羅, 阿部敬太, 杉岡健一, 久保正樹, 塚田隆夫, 木下恭一, 荒井康智, 稲富裕光

    化学工学会秋季大会研究発表講演要旨集(CD-ROM)　2014

  39. ナノ粒子/高分子コンポジット薄膜内のナノ粒子空間構造に及ぼす諸因子の影響

    LIU Yang, 藤井岳史, 久保正樹, 杉岡健一, 塚田隆夫, 高見誠一, 阿尻雅文

    日本伝熱シンポジウム講演論文集(CD-ROM)　2013

  40. ナノ粒子/高分子コンポジット薄膜の溶媒蒸発現象およびこれに伴う構造形成過程

    坂井慎次, 佐々木優大, 久保正樹, 杉岡健一, 塚田隆夫, 高見誠一, 阿尻雅文

    日本伝熱シンポジウム講演論文集(CD-ROM)　2013

  41. 高分子ナノコンポジット薄膜内のナノ粒子空間構造に及ぼす諸因子の影響

    劉洋, 藤井岳史, 久保正樹, 杉岡健一, 塚田隆夫, 高見誠一, 阿尻雅文

    化学工学会秋季大会研究発表講演要旨集(CD-ROM)　2013

  42. ナノ粒子/高分子コンポジット薄膜のdewettingに及ぼす諸因子の影響

    藤井岳史, 劉洋, 久保正樹, 杉岡健一, 塚田隆夫, 高見誠一, 阿尻雅文

    化学工学会秋季大会研究発表講演要旨集(CD-ROM)　2013

  43. 溶液キャスト法を用いたナノ粒子/高分子コンポジット薄膜の形成プロセスの解明

    坂井慎次, 佐々木優大, 久保正樹, 杉岡健一, 塚田隆夫, 高見誠一, 阿尻雅文

    化学工学会大会講演要旨集(CD-ROM)　2013

  44. ナノ粒子/ポリマー複合薄膜の溶媒蒸発現象および構造形成過程

    佐々木優大, 坂井慎次, 杉岡健一, 久保正樹, 塚田隆夫, 高見誠一, 阿尻雅文

    化学工学会年会研究発表講演要旨集(CD-ROM)　2013

  45. P26 Ultrasonic Synthesis of Poly (N-Isopropylacrylamide-co-2-Hydroxyethyl Methacrylate)(Poster Session)

    Ohata Masahiro, Kubo Masaki, Sugioka Ken-ichi, Tsukada Takao

    Proceedings of the Annual Meeting of the Japan Society of Sonochemistry　2013

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    Poly (N-Isopropylacrylamide-co-2-hydroxyethyl methacrylate) (P(NIPAAm-co-HEMA)) was synthesized using ultrasonic irradiation without chemical initiator in the mixed solvent of water and ethanol. Effects of solvent composition, monomer molar ratio, and reaction temperature on time course of conversion to polymer, number average molecular weight, and polydispersity were investigated in order to synthesize the polymer with low molecular weight distribution (i.e., low polydispersity). Lower ethanol composition of solvent resulted in higher conversion to polymer, faster decrease of molecular weight, and lower polydispersity. Ethanol acts as a scavenger for radical polymerization, so that higher ethanol composition decreases the polymerization rate. Faster polymerization rate gives faster generation of polymer, and faster degradation of generated polymer, which resulted in faster decrease of molecular weight and lower polydispersity. Higher NIPAAm ratio resulted in higher polymerization rate, faster polymer degradation rate, and lower polydispersity. In the case of the homopolymer of PNIPAAm and PHEMA, PNIPAAm radical has lower reaction activity with ethanol than PHEMA radical, so that PNIPAAm polymerizes faster than PHEMA. Reaction temperature slightly affected the reaction rate. Temperature dependence of polymerization is positive but that of radical formation is negative, and the effect of those two factors might be almost same.

  46. 微小重力下におけるTLZ法によるSiGe単結晶成長プロセスの数値シミュレーション

    阿部敬太, 住岡沙羅, 杉岡健一, 久保正樹, 塚田隆夫, 木下恭一, 荒井康智, 稲富裕光

    化学工学会秋季大会研究発表講演要旨集(CD-ROM)　2013

  47. TLZ法による微小重力下SiGe結晶成長実験(その4-数値解析による考察)

    住岡沙羅, 阿部敬太, 杉岡健一, 久保正樹, 塚田隆夫, 木下恭一, 荒井康智, 稲富裕光

    結晶成長国内会議予稿集(CD-ROM)　2013

  48. TLZ法による微小重力下SiGe結晶成長実験(その3-TLZ法の数値解析)

    阿部敬太, 住岡沙羅, 杉岡健一, 久保正樹, 塚田隆夫, 木下恭一, 荒井康智, 稲富裕光

    結晶成長国内会議予稿集(CD-ROM)　2013

  49. 無機ナノ粒子/高分子コンポジット薄膜のdewetting現象と粒子空間分布との相関

    高橋洋祐, 久保正樹, 杉岡健一, 塚田隆夫, 南公隆, 阿尻雅文

    化学工学会年会研究発表講演要旨集(CD-ROM)　2012

  50. A8 Control of molecular weight distribution in ultrasonic polymer synthesis

    Kubo Masaki, Kondo Takayuki, Kitakawa-Shibasaki Naomi, Yonemoto Toshikuni

    Proceedings of the Annual Meeting of the Japan Society of Sonochemistry　2012

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    Poly (2-hydroxyethyl methacrylate) (PHEMA) was synthesized using ultrasonic irradiation without chemical initiator. Effects of ultrasound intensity on time course of conversion to polymer, number average molecular weight, and polydispersity were investigated in order to synthesize the polymer with low molecular weight distribution (i.e., low polydispersity). According to the experimental results, a kinetic model for polymer synthesis under ultrasonic irradiation was constructed with considering both polymerization and polymer degradation. Poly (N-isopropylacrylamide) (PNIPAAm) was also synthesized at low reaction temperature. The constructed model was applied to the low-temperature synthesis process.

  51. 静磁場重畳電磁浮遊法を用いた溶融Cuの熱伝導率測定

    馬場 雄也, 井上 貴充, 小畠 秀和, 杉岡, 健一久保, 正樹, 塚田 隆夫, 福山 博之

    化学工学会第43回秋季大会　2011/09/14

  52. 感温性ヒドロゲルからのタンパク質放出挙動に及ぼす環境温度の影響

    佐々木 翔平, 久保 正樹, 北川 尚美, 米本 年邦

    化学工学会75年会　2011/03/22

  53. 副生物の除去工程を必要としない高品質バイオディーゼル燃料合成法

    金川 恵一, 久保 正樹, 北川 尚美, 米本 年邦

    化学工学会75年会　2011/03/22

  54. 静磁場重畳電磁浮遊法により測定した溶融金属の熱伝導率と静磁場強度との相関

    馬場 雄也, 杉岡 健一, 久保 正樹, 塚田 隆夫, 杉江 一寿, 小畠 秀和, 福山 博之

    化学工学会75年会　2011/03/22

  55. 超音波を用いたポリマー合成における分子量分布の制御

    化学工学会反応工学部会ソノプロセス分科会シンポジウム　2010/10/23

  56. 超音波照射下における酸化チタン懸濁液中でのラジカル生成速度の評価

    秋山 雄大, 久保 正樹, 北川 尚美, 米本 年邦

    化学工学会第42回秋季大会　2010/09

  57. ポリ(メタクリル酸2-ヒドロキシエチル)の超音波合成における分子量および分散度の制御

    近藤 孝行, 久保 正樹, 北川 尚美, 米本 年邦

    化学工学会第42回秋季大会　2010/09

  58. タバコ細胞培養によるヒト型糖鎖を有するモデルタンパク質生産

    秋山 拓郎, 久保 正樹, 北川 尚美, 七谷 圭, 魚住 信之, 鳥山 欽哉, 米本 年邦

    化学工学会第42回秋季大会　2010/09

  59. 水溶性ラジカル存在下における生体膜脂質コレステロールの酸化反応速度

    木村 優也, 村上 理彦, 久保 正樹, 北川 尚美, 米本 年邦

    化学工学会75年会　2010/03

  60. Control of Molecular Weight Distribution of Poly(2- Hydroxyethyl Methacrylate) Using Ultrasonic Irradiation International-presentation

    Masaki Kubo, Hideki Matsui, Naomi Shibasaki-Kitakawa, Toshikuni Yonemoto

    2009 AIChE Annual Meeting　2009/11

  61. BSA内包P(NIPAAm-co-HEMA)ヒドロゲルの感温性，放出特性に及ぼす重合温度の影響

    久保 正樹, 松井 英樹, 北川 尚美, 米本 年邦

    化学工学会米沢大会　2009/08

  62. 超音波照射下におけるポリ(メタクリル酸2-ヒドロキシエチル)の生成に関する離散化速度論モデル

    松井 英樹, 久保 正樹, 北川 尚美, 米本 年邦

    化学工学会74年会　2009/03

  63. 形質転換タバコ細胞培養による分泌型ヒト胎盤アルカリホスファターゼ生産

    宮本 卓弥, 北川 尚美, 久保 正樹, 魚住 信之, 鳥山 欽哉, 米本 年邦

    化学工学会74年会　2009/03

  64. バイオディーゼル燃料生産におけるメタノール添加量低減の検討

    辻 崇裕, 久保 正樹, 北川 尚美, 米本 年邦

    化学工学会 研究発表講演要旨集　2009

  65. リポソーム系におけるコレステロールおよびβ-カロテンの酸化反応速度

    村上理彦, 久保正樹, 北川尚美, 米本年邦

    第47回日本油化学会年会　2008/09

  66. 超音波照射下におけるポリ(メタクリル酸2-ヒドロキシエチル)のラジカル重合速度

    松井 英樹, 久保 正樹, 北川 尚美, 米本 年邦

    化学工学会第40回秋季大会　2008/09

  67. Evaluation Of Protein Release Rate From Thermosensitive Hydrogel Using Poly (N-Isopropylacrylamide)-Co-Poly (2-Hydroxyethyl Methacrylate) International-presentation

    Masaki Kubo, Takafumi Matsuyama, Toshikuni Yonemoto

    2007 AIChE Annual Meeting　2007/11

  68. 超音波照射下におけるラジカル生成量の電子スピン共鳴装置を用いた評価

    関口 和宏, 久保 正樹, 米本 年邦

    化学工学会第39回秋季大会　2007/09

  69. ポリ(N-イソプロピルアクリルアミド)を用いた感熱性ヒドロゲルからのタンパク質放出速度論モデル

    松山尚文, 久保正樹, 米本 年邦

    化学工学会第72年会　2007/03

  70. 機能性タンパク質含有水溶液における菌体の超音波および酸化チタン併用殺菌

    松澤 卓也, 久保 正樹, 米本 年邦, 安藤 哲也

    化学工学会第38回秋季大会　2006/09

  71. Ultrasonic Degradation of Phenol in the Presence of Composite Particles of TiOＣＨ2 and Activated Carbon International-presentation

    Masaki Kubo, Hiroto Fukuda, Xin Juan Chua, Toshikuni Yonemoto

    2005 AIChE Annual Meeting　2005/11

  72. 超音波照射下におけるフェニルアセトニトリルのC-アルキル化速度

    飯村康二, 久保正樹, 米本年邦

    化学工学会第37回秋季大会　2005/09

  73. ポリ(N-イソプロピルアクリルアミド)を用いた感熱性ヒドロゲルの作製

    松山尚史, 久保正樹, 米本年邦

    化学工学会第37回秋季大会　2005/09

  74. 油水二相系におけるトリグリセリドの酵素加水分解に関する反応速度論モデル

    Hermansyah Heri, 久保正樹, 北川尚美, 米本年邦

    化学工学会第37回秋季大会　2005/09

  75. 酸化チタン／活性炭複合粒子存在下におけるフェノールの超音波分解速度

    久保正樹, 福田紘人, Xin Juan Chua, 米本年邦

    化学工学会関東支部５０周年記念大会　2005/08

  76. 酸化チタン粒子存在下における超音波照射による大腸菌の殺菌速度論

    久保正樹, 小野寺良太, 北川尚美, 米本年邦

    第２回東北大学バイオサイエンスシンポジウム　2005/05

  77. 油水二相系におけるリパーゼ酵素を用いたトリオレインの加水分解速度論

    Heri Hermansyah, 安部隆佑, 久保正樹, 北川尚美, 米本年邦

    第２回東北大学バイオサイエンスシンポジウム　2005/05

  78. 親水性モノマー消費を考慮した界面重合法マイクロカプセルの形成に関する数学モデル

    宮崎聖司, 恩田陽人, 久保正樹, 米本年邦

    化学工学会第70年会　2005/03

  79. Ultrasonic degradation of phenol in the presence of composite particles of Tio2 and activated carbon

    Kubo M, Fukuda H, Chua X.J, Yonemoto T

    AIChE Annual Meeting, Conference Proceedings　2005

  80. 油-水二相系におけるリパーゼ酵素を用いたトリオレインの加水分解速度論

    Hermansyah Heri, 久保 正樹, 北川 尚美, 米本 年邦

    化学工学会 研究発表講演要旨集　2003

  81. CMPプロセスにおける研磨粒子ダイナミクスの解明

    久保 正樹, 国守 博巳, 福田 晃, 塚田 隆夫, 寶澤 光紀

    精密工学会大会学術講演会講演論文集　2000/03/01

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Industrial Property Rights 1

  1. 水処理方法および装置

    米本 年邦, 久保 正樹, 辻 猛志, 坂井 至, 中原 啓介, 渕上 浩司

    Property Type: Patent

Research Projects 13

  1. バルク金属を原料とするSDGs指向超音波固液系金属ナノ粒子合成プロセスの構築

    林 大和, 久保 正樹, 成田 一人, 吉岡 聰

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 東北大学

    2022/04/01 - 2025/03/31

  2. Flow visualization of heavy oil in supercritical water atmosphere by neutron radiography

    Tsukada Takao, KUBO MASAKI

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2016/04/01 - 2018/03/31

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    For a packed bed reactor, which consists of a 1/2-inch stainless steel tube filled with alumina particles having the diameter of 3 mm, the flow behavior of heavy oil in the reactor under the atmosphere of nitrogen gas or supercritical water was observed by neutron radiography. In the heavy oil/nitrogen gas system, the effect of reactor temperature on the flow behavior at atmospheric pressure was clarified. Particularly, the flow channeling was observed in the reactor at a relatively high temperature. In the heavy oil/supercritical water system, the effect of flow rate of heavy oil on the flow behavior was investigated at 400℃ and 25 MPa. Through this work, it was revealed that neutron radiography is a useful technique to visualize the flow behavior of heavy oil in a packed bed reactor, whose wall was made of metal, at high temperature and high pressure.

  3. Investigation of formation mechanism of two-dimensional spatial structures of nanoparticles in polymer thin films

    Tsukada Takao, ADSCHIRI TADAFUMI, KUBO MASAKI, SUGIOKA KENICHI

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2014/04/01 - 2016/03/31

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    The spatial structures of organic molecule-modified CeO2 nanoparticles in polystyrene (PS) nanocomposite thin films spin-coated on silicon substrates were observed by TEM and SPM, before and after the films underwent thermal annealing above the glass transition temperature of PS. TEM images indicated that the nanoparticles segregated to the surface of PS nanocomposite thin film after spin-coating process. Then, the nanoparticles migrated away from the film surface to the substrate/film interface during thermal annealing, maintaining the two-dimensional spatial structures. Here, we clarified the effect of interaction between nanoparticles, i.e., surface modifiers on the nanoparticles, and solvent or PS on the spatial structures of nanoparticles before and after thermal annealing. In addition, the mechanism of nanoparticle migration across the PS thin film was investigated.

  4. Development of system to analyze the undercooling solidification process of molten materials at high temperature

    Tsukada Takao, FUKUYAMA HIROYUKI, KUBO MASAKI, SUGIOKA KENICHI

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2013/04/01 - 2016/03/31

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    To investigate the effect of melt convection in molten Cu80Co20 on phase separation structures in the undercooled state, the velocity distributions on the surface of an electromagnetically levitated molten Cu80Co20 droplet were measured using a high-speed video camera, and then the structures of the solidified sample were observed by SEM, where the strength of convection was controlled by applying a static magnetic field to the droplet. As a result, it was revealed that the transition from turbulent flow to laminar one in the droplet occurs around 1.5 T at which the phase separation structure of Cu-Co alloy changes remarkably. In addition, the normal spectral emissivity and surface tension of molten Cu-Co alloys with different compositions were measured in the wide temperature range including the undercooling condition by using the same electromagnetic levitator.

  5. In-situ neutron tomography on mixing behavior in a reactor for supercritical hydrothermal synthesis

    TSUKADA TAKAO, TAKAMI Seiichi, TAKENAKA Nobuyuki, SAITO Yasushi, KUBO Masaki, SUGIOKA Kenichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2012/04/01 - 2014/03/31

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    In this study, the mixing behavior of supercritical water and room temperature water in three types of tubular flow reactors with different geometries for supercritical hydrothermal synthesis was visualized by using neutron radiography, and the effect of mass flow rates of supercritical and room temperature water on the temperature distributions in the reactor was clarified, comparing with the results of numerical simulations. In addition, neutron computed tomography (CT) was carried out to acquire the detailed knowledge of three-dimensional distributions of water density in the reactor.

  6. Research for tocotrienol recovery and biodiesel production from waste rice bran oil

    YONEMOTO Toshikuni, SHIBASAKI Kitakawa naomi, KUBO Masaki, NAMASHIMA Kazunori

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2009 - 2011

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    The purpose of this research is to construct a novel reaction and separation process for producing bioactive compounds, tocotrienol (vitamin E), and renewable energy, high quality biodiesel, from waste oils discharged in the vegetable oil refining process. The process consists of the esterification of free fatty acid using cation-exchange resin catalyst, the adsorption of tocotrienol on the anion-exchange resin, the desorption of tocotrienol from the resin and the transesterification of triglyceride using anion-exchange resin catalyst. The optimal conditions for continuous operation in each step were investigated and elucidated.

  7. Investigation of relationship between transport phenomena and spatial structure of nanoparticles in nanoparticles/polymer composite thin films

    TSUKADA Takao, AJIRI Tadafumi, KUBO Masaki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2009 - 2011

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    For the design and optimization of coating process of nanoparticles/polymer composite thin films and their devise manufacturing, solvent evaporation from the films and dewetting dynamics of the films during thermal annealing were observed, and the relationship between these phenomena and the spatial structure of nanoparticles in the films was investigated. The evaporation rate of organic solvent from the film was strongly affected by the presence of nanopraticles. The dewetting was suppressed by adding nanoparticles which segregated to the film surface. Brownian dynamics simulations suggested that the dispersion state of nanoparticles in solvent depends on the combination of solvent and organic molecules to modify the nanoparticle surface.

  8. Long-term prevention of oxidation of bioactive material using three-dimensional regeneration reaction of antioxidant with catechin

    YONEMOTO Toshikuni, KITAKAWA Naomi, KUBO Masaki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2004 - 2006

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    In this research, a high-speed regeneration cycle of antioxidants was designed by combining an amphiphilic catechin with a lipophilic vitamin E and a hydrophilic vitamin C for the purpose of long-term prevention of f3-carotene oxidation in the food system. In the presence of vitamin E and C, the following things were clarified: 1) the carotene oxidation was prevented as long as vitamin E existed in the system, 2) vitamin C was related to two contrastive reactions consuming and regenerating vitamin E, 3) the prevention period of carotene oxidation significantly increased under specific conditions. Conventionally the regeneration reaction of vitamin E by vitamin C was considered to contribute the increase of the prevention period. However, oxygen in the system was clarified to be almost consumed by the oxidation of vitamin C itself and consequently the carotene oxidation was prevented. The novel kinetic model considering the reaction mechanisms of carotene, vitamin E and C well described the contrastive effects progressing or preventing the carotene oxidation according to the amounts of vitamin C and oxygen in the system. On the other hand, the following things were clarified in the presence of catechin: 1) catechin was related to two contrastive reactions consuming carotene and preventing the carotene oxidation and 2) the structure of catechin was controlled which reaction preferentially occurred.

  9. Study on compressive and shear deformations of an abrasive particle aggregate in chemical mechanical polishing process

    TSUKADA Takao, KUBO Masaki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2003 - 2004

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    The aims of the present work are to manufacture a micro compression tester to measure the mechanical properties of a particle aggregate formed in a shear flow, and to investigate the effect of several factors on the compressive deformation characteristics of the aggregate. This year, the followings were carried out. 1.Manufacture of glass fiber probe : a manufacturing technique of a glass fiber probe to compress a particle aggregate was established by combining hydrofluoric acid etching and optical polishing. 2.Visualization of compressive deformation behavior of particle aggregate : a three-dimensional visualization technique of aggregate by superimposing laser scanning confocal microscope images was established. 3.Compression test : the compression test of a particle aggregate formed in a shear flow was carried out, and the effectiveness of a micro compression tester developed here was demonstrated. Before the compression test, the aggregation and breakup behaviors of latex particles in shear flow confined between two parallel plates were investigated using an in situ observation apparatus with a laser scanning confocal microscope. As a result, the average size of the aggregates decreases as shear rate increases and the gap width decreases due to the hydrodynamic effect acting on the aggregates. The size distributions of the aggregates become narrow as the gap width decreases. In addition, the fractal dimension, i.e., the structure of the aggregates, was almost independent of shear rate and the gap width, and approximately 1.2, which suggests that the aggregates are relatively compact.

  10. Perfect prevention of oxidation of material with biological activity using regeneration reaction of lipid soluble antioxidant with catechin

    YONEMOTO Toshikuni, KUBO Masaki, KITAKAWA Naomi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2001 - 2002

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    The purpose of this research is to evaluate the antioxidant activity of catechin and to construct a novel method for preventing the oxidation of desired materials with biological activity in the actual food system using a regeneration reaction of lipid soluble antioxidant with catechin. In 2002, the oxidation experiments of β-carotene, an active oxygen quencher, were performed in an inert n-decane solvent with addition of epigallocatechin gallate (EGCG) or epicatechin gallate (ECG). In both cases, the induction period, in which the β-carotene concentration decreased slightly, was observed and the oxidation was suppressed. The induction period became longer with increasing the ECG concentration, whereas the period had a maximum at a certain EGCG concentration. EGCG containing pirogallol group is known to oxidize itself to produce activated oxygen. Therefore, EGCG was considered to have a progressive activity of the oxidation as well as the antioxidant activity. β-Carotene is commonly dissolved in the oil in water emulsion when used as a food additive. Catechin haying amphiphilic property is more easily dissolved in the water phase. The reaction of β-Carotene and lipid-soluble antioxidant, α-tocopherol, with catechin occurs on the oil-water interface. In 2003, the oxidation experiments in the presence of α-tocopherol were performed in the biphasic oil-water system having a definite interfacial area. In the biphasic system, the time for which α-tocopherol remained was longer than that in the single phase of n-decane. Since the β-carotene oxidation was suppressed during a-tocopherol remained in the oil phase, the existence of water phase was effective for the suppression of β-carotene oxidation. α-Tochopherol was consumed by its oxidation as well as the antioxidative protection of β-carotene. The peroxyl radical of α-tocopherol concerned with the chain oxidation was easy to dissolve in the water. This phenomenon seemed to contribute the restrain of α-tocopherol consumption, resulting in the suppression of β-carotene oxidation. A kinetic model was constructed by considering the transfer of the α-tocopherol peroxyl radical into the water phase in addition to the oxidation and antioxidation mechanisms of β-carotene. The model quantitatively described the oxidation behavior of β-carotene in the biphasic system over a wide range of the initial α-tocopherol concentrations.

  11. Experimental and Theoretical Studies on Particle Dynamics in Chemical Mechanical Polishing (CMP) Process

    HOZAWA Mitsunori, KUBO Masaki, TSUKADA Takao

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    1999 - 2001

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    Since the slurries used in the CMP process contain several chemical additives, under certain conditions, the particles in the slurries may aggregate and adhere to the wafer and/or pad surfaces before and during the polishing process. Such aggregations result in defects such as scratches on the wafer surface. Therefore, for performance of good local and global planarity without failures, it is important to determine the optimal conditions for preparation of stabilized slurries without aggregations. In addition, the acquirement of correct knowledge about the size and shape of aggregates during the process, i.e., the aggregation and breakage behaviors of particles in a confined shear flow between the wafer and the pad, is also a critical issue. The aim of the present work is to investigate experimentally and theoretically the particle dynamics in a simple shear flow confined between the two parallel walls. We developed an experimental apparatus with a confocal scanning laser microscope for in-situ observation of the particle dynamics in a shear flow between two parallel disks. In experiment, polystyrene particles of 2μm in diameter were suspended in a NaCl aqueous solution. We could observed the rotational behavior of aggregates in a shear flow. As a result, it was found that lower shear rate results in larger size of aggregates. In addition, as the distance between two disks increased, the average area of aggregates increased. We constructed a mathematical model for particle aggregation process in a shear flow. In this model, we considered the hydrodynamic drag, the interaction between particle and particle, and particle and wall, and colloidal interactions. As the distance between two parallel walls increased, the size of aggregates increased and the number of aggregates contacted with wall decreased. When the colloidal interaction between particle and wall was smaller than that between particle and particle, the size of aggregates increased and the number of aggregates contacted with wall decreased.

  12. Optimization of Manufacturing Process of Waveguides on Nonlinear Optical Polymer film

    TSUKADA Takao, KUBO Masaki, HOZAWA Mitsunori

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    1999 - 2000

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    Numerical simulations of the manufacturing of waveguides with grating patterns on a nonlinear optical (NLO) polymer film using photothermal poling were carried out The mathematical model was constructed, in which spatial and temporal variations of molecular dipoles during heating with a focused laser beam and electrical poling were considered. The effects of operational factors, i.e., laser power, beam diameter, moving speed of a sample, and electric field strength, on the grating configuration were investigated. As a result, the following guidelines for producing a waveguide with high performance were obtained : the laser beam wavelength should be selected so as to heat uniformly throughout the thickness of the polymer film, the laser power should be as high as possible without causing large deformation in the film, the laser beam diameter should be smaller than half period of the grating, the moving speed of the stage should be slow, and the electric field strength should be as high as possible, if dielectric breakdown is to be avoided. In addition, measurements of the rotational diffusion coefficient and the thermal diffusivity of poly (methyl methacrylate) with Disperse Red 1 (DR1) chromophore side groups were carried out.

  13. Development of Continuous Synthesis Process of Nanosize Titania Particles for Dye-Sensitized Solar Cell

    YONEMOTO Toshikuni, KUBO Masaki, SHIBASAKI-KITAKAWA Naomi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    1999 - 2000

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    The purpose of this study is to construct the continuous synthesis process of monodispersed nanosize titania (TiO_2) particles in which mean particle size is under 50 nm and geometric standard deviation is under 1.2. To synthesis the nanosize TiO_2 particles, there are a build-up and a breakdown method. In this study, alkoxide method was used as a build-up method, and peptization was used as a breakdown method. First, alkoxide method, the synthesis method of TiO_2 particles by hydrolysis and condensation reaction of tetraethyl orthotitanate (TEOT), was examined. The condition to prepare the nanosize particles was examined by using a batch reactor. The ethanol solution of TEOT and hydroxypropyl cellulose (HPC), a polymer dispersant, was mixed with the water-ethanol solution to progress the reaction. At 0.025 mol/dm^3 of TEOT, 0.025 mol/dm^3 of water, and 2.5 g/dm^3 of HPC, the particle with 38 nm of mean particle size and 1.19 of geometric standard deviation was obtained. Based on the result of the batch experiment, the continuous synthesis was carried out using a slug flow tubular reactor system we have proposed. In this system, a packed bed for the nucleation of particles is connected in series with a slug flow aging tube. Mean particle size and geometric standard deviation of the particles obtained by the continuous system were almost same as that of the batch reactor. The peptization in which large particle was divided by the dissolution of the particle surface was carried out by using the batch reactor. The particle obtained by the alkoxide method was peptized using nitric acid. The optimum value exists for the nitric acid concentration, and the particle with 32 nm was obtained, which was smaller than the particle obtained by the alkoxide method. The geometric standard deviation was 1.22.

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  1. 超音波重合法を利用した固体高分子形燃料電池用ポリマー新規合成プロセスの開発

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    固体高分子形燃料電池(PEFC)は、家庭用コージェネレーションシステムなどの定置用電源および車両駆動電源等の移動体用電源としての実用化を目指し、国内外で研究開発が進められている。車両駆動用電源を想定した場合、発電性能の更なる向上が望まれている。本研究では、PEFC用ガス拡散層に用いられているα-メチルスチレンとテトラフルオロエチレンの共重合体で、分子量数千～数万と比較的低分子量であるポリマーをターゲットとする。そして、分子量分布の指標である分散度（＝重量平均分子量/数平均分子量）が1.2以下のポリマーを獲得するために、超音波を用いた新規な合成プロセスを提案することを目的とする。

  2. ナノ構造制御複合粒子の合成と有機物超音波分解への利用

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    近年、環境汚染の原因となる難分解性有害有機化合物の分解処理速度を向上させる新規技術の創成が望まれている。本研究は、疎水性である有機化合物の吸着能に優れた活性炭と光触媒能を有する酸化チタンとの複合粒子を合成し、酸化チタン表面で発生するラジカルを分解反応に効率的に利用することを可能とすることで、有機化合物の高速分解を可能にした。

  3. Kinetics of Ultrasonic Degradation of Phenol in Presence of TiO2 Particles

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    酸化チタン存在下でフェノールの超音波分解を行った。酸化チタンを添加した方が、転化しない場合に比べて、分解速度が向上することを見出した。

  4. スラグ流を利用する流通管型反応器を用いた単分散チタン酸バリウム微粒子の連続合成

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    スラグ流を利用する流通管型反応器を用い、キレート分解法を利用して、粒径の揃ったいわゆる単分散チタン酸バリウム微粒子を連続合成するプロセスを開発する。