Updated on 2024/04/03

写真a

 
KAWASUMI Masaya
 
Organization
Institutes of Innovation for Future Society Designated professor
Graduate School
Graduate School of Engineering
Title
Designated professor
Contact information
メールアドレス

Degree 1

  1. Doctor of Philosophy （ 1993.3   Case Western Reserve University ） 

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Research Interests 6

  1. nanomaterial

  2. nanocomposite

  3. Electrode catalyst

  4. Polymer electrolyte membrane

  5. Electrolysis of water

  6. Fuel cell

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Research Areas 3

  1. Nanotechnology/Materials / Nanomaterials

  2. Nanotechnology/Materials / Energy chemistry

  3. Nanotechnology/Materials / Polymer materials

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Current Research Project and SDGs 5

  1. 水素エネルギー

  2. Catalyst

  3. Electrolyte materials

  4. Electrolysis of water

  5. Fuel Cell

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Research History 7

  1. Nagoya University   Institutes of Innovation for Future Society   Designated professor

    2019.4

  2. Nagoya University   Institute of Innovation for Future Society pen   Designated professor

    2019.4

  3. Nagoya University   Graduate School of Engineering Chemical Systems Engineering 2   Designated professor   Ph.D.

    2019.4

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    Country：Japan

  4. 株式会社豊田中央研究所   役員室   参与

    2018.7 - 2019.6

  5. 株式会社豊田中央研究所   役員室   リサーチ・アドバイザー

    2016.7 - 2018.7

  6. 株式会社豊田中央研究所   役員室   取締役

    2013.7 - 2016.6

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    Country：Japan

  7. 株式会社豊田中央研究所

    1985.4 - 2013.6

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Education 3

  1. Case Western Reserve University   Department of Macromolecular Science and Engineering

    1989.9 - 1993.3

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    Country： United States

  2. Nagoya University

    1983.4 - 1985.3

  3. Nagoya University

    1979.4 - 1983.3

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    Country： Japan

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Professional Memberships 4

  1. 日本化学会

  2. 電気化学会

  3. 自動車技術会

  4. 高分子学会

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Committee Memberships 2

  1. 日本学術振興会　マイクロビームアナリシス　第141委員会   副委員長  

    2013 - 2016   

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    Committee type：Academic society

  2. 日本学術振興会　マイクロビームアナリシス　第141委員会   諮問委員  

    2016 - 2020   

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    Committee type：Academic society

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Awards 2

  1. 平成20年度　高分子学会賞　技術

    2008.9   高分子学会   ポリオレフィンおよびゴム系クレイナノコンポジットの開発

    臼杵　有光、加藤　誠、長谷川　直樹、岡本　浩孝、川角　昌弥

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    Award type：Award from Japanese society, conference, symposium, etc.  Country：Japan

  2. 平成19年　ケイ素化学協会技術賞

    2007.11   ケイ素化学協会   ナイロン－粘土ハイブリッドの研究と開発

    岡田茜 、臼 有光、川角昌弥、加藤誠、長谷川直樹

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    Award type：Award from Japanese society, conference, symposium, etc.  Country：Japan

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Papers 87

  1. Single-Walled Carbon Nanotubes Supported Pt Electrocatalyst as a Cathode Catalyst of a Single Fuel Cell with High Durability against Start-up/Shut-down Potential Cycling

    Huda, M; Kawahara, T; Park, JH; Kawasumi, M; Matsuo, Y

    ACS APPLIED ENERGY MATERIALS   Vol. 6 ( 24 ) page： 12226 - 12236   2023.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：ACS Applied Energy Materials  

    Carbon nanotubes (CNTs) have remarkable properties such as high conductivity, high porosity, and high oxidation resistance, which make them excellent candidates for supporting electrocatalysts in proton exchange membrane fuel cells (PEMFCs). In this study, high-crystallinity, high-purity single-walled carbon nanotubes (SWCNTs), which were prepared by enhanced direct injection pyrolytic synthesis (e-DIPS), were used as a support for a metal electrocatalyst. Platinum (Pt) nanoparticles of uniform size were synthesized by a facile solvothermal method and distributed evenly on the surface of the SWCNTs (Pt/SWCNT). Electrochemical measurements using cyclic voltammetry and linear sweep voltammetry showed that the Pt/SWCNT exhibited higher mass activity and specific activity compared to commercial Pt nanoparticles supported on graphitized carbon (Pt/C). A PEMFC membrane electrode assembly (MEA) utilizing Pt/SWCNT as the cathode layer (Pt/SWCNT-MEA) with low Pt loading demonstrated high-efficiency performance with power density per gram of Pt that was three times higher than that of Pt/C. Furthermore, in a durability test using a high-voltage triangular wave between 1.0 and 1.5 V to induce corrosion of the catalyst and carbon support, simulating harsh conditions of actual repeated start-up/shut-down cycles during long-term use, the Pt/SWCNT-MEA retained high performance even after 10,000 potential cycles. These results indicate that SWCNTs show promise as an excellent support material for electrocatalysts, offering high performance and durability, and thus can contribute to realizing PEMFCs with superior performance.

    DOI： 10.1021/acsaem.3c01919

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  2. Highly durable graphene-encapsulated platinum-based electrocatalyst for oxygen reduction reactions synthesized by solution plasma process

    Park, JH; Kim, K; Wang, XY; Huda, M; Sawada, Y; Matsuo, Y; Saito, N; Kawasumi, M

    JOURNAL OF POWER SOURCES   Vol. 580   2023.10

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Journal of Power Sources  

    Though expensive platinum (Pt) is used as catalyst for oxygen reduction reaction (ORR) in polymer electrolyte fuel cells (PEFCs), insufficient durability remains as a bottleneck for commercialization of PEFCs. Improving both catalytic performance and durability by graphene encapsulation is an attractive strategy to solve this problem. In this study, graphene-encapsulated PtFe core-shell catalyst is synthesized with dimethyl formamide (DMF) and a pair of Pt and Fe electrodes without using any metal salts by utilizing the solution plasma (SP) process. TEM and EELS results show synthesized PtFe nanoparticles are encapsulated with close to single-layered highly crystallized graphene. Although commercial Pt/C showed significant performance degradation (ECSA −33%, MA −68%) after 50,000 cycles of accelerated durability test (ADT), PtFe core-shell catalyst shows remarkably improved durability (ECSA −13%, MA −19%) while graphene shell clearly remains. The improved durability is more prominent in the single cell test, the decrease in maximum power density after 6000 cycles of ADT was significantly lower as −1.2%, compared to that of Pt/C (−52.1%). This study introduces a novel and attractive catalyst synthesis process by the SP method followed by heat treatments and suggests graphene encapsulation can improve long-term durability of catalyst while maintaining ORR activity.

    DOI： 10.1016/j.jpowsour.2023.233419

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  3. Novel solution plasma synthesis of highly durable carbon shell encapsulated platinum-based cathode catalyst for polymer electrolyte membrane fuel cells

    Park, JH; Saito, N; Kawasumi, M

    CARBON   Vol. 214   2023.10

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Carbon  

    Developing an effective method for synthesizing high-performance and durable catalysts for the oxygen reduction reaction is of great importance for cost reduction and the wide application of fuel cells. This study presents a simple and effective strategy using a plasma reaction in the liquid phase to synthesize carbon-shell-encapsulated Pt and PtFe catalysts. A carbon-shell-encapsulated PtFe catalyst alloyed with up to 29 at.% Fe exhibits a mass activity of 730 mA·mgpt−1 and a specific activity of 1772 μA cm−1, which are 2.4 and 5 times higher than that of commercial Pt/C, respectively. The carbon shell effectively maintained the low oxidation state of Pt by suppressing the formation of Pt–OH and significantly improved the durability of the catalyst in accelerated durability tests, increasing the gap in mass activity with Pt/C by a factor of up to six after 50,000 cycles. In addition, the decrease in the electrochemical surface area by the carbon shell enabled a more stable 4-electron reaction over a wide potential range. This study may provide fascinating insights into the effect of the carbon shell contributing to the improvement of the catalytic activity and durability of fuel cells as well as the novel plasma-based synthesis strategy of core-shell catalyst.

    DOI： 10.1016/j.carbon.2023.118364

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  4. Efficient CO2/Electrochemical Reduction by a Robust Electrocatalyst Fabricated by Electrodeposition of Indium and Zinc over Copper Foam

    Sirisomboonchai, S; Machida, H; Tran, KVB; Kawasumi, M; Norinaga, K

    ACS APPLIED ENERGY MATERIALS   Vol. 5 ( 8 ) page： 9846 - 9857   2022.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：ACS Applied Energy Materials  

    Electrochemical reduction of CO2comprising the CO2reduction reactuib (CO2RR) and oxygen evolution reaction (OER) is one of the most promising technologies for electrification of the chemical process industry. Here, the performance of a electrocatalyst with a three-dimensional structure of InZnCu on Cu foam (CF) is presented. This electrocatalyst was fabricated by electrodeposition of In and Zn over Cu and exhibited a superior reduction of CO2to CO at a Faradaic efficiency of 93.7% at -0.7 V and an excellently long duration of 100 h. Due to the synergy of the thin In layer, the Zn nanosheets provided a high surface-active area and strong mechanical robustness during the reaction. Additionally, a two-electrode system was constructed based on the CF-modified surface, which provided valuable guidelines on the overall CO2RR-OER system for further evolution. Furthermore, due to the facile synthesis, the bimetal-layer double hydroxide (LDH) exhibited high conductivity and high OER performance. Hence, the two-electrode system assembled excellent electrocatalysts for the CO2RR-OER (InZnCu/CF||Cu(OH)2NWs@NiCo-LDH/CF) with high conversions of CO2to CO of 67% and 88% at 2 and 50 mA cm-2, respectively. Notably, the CO2RR-OER system exhibited excellent stability in a 40 h CO2conversion with a constant current density of 2 mA cm-2at an ultralow voltage of 1.59 V. Moreover, the calculation of the energy input converting CO per ton of CO2resulted in a low energy input range for further development in scalability. This overall CO2RR-OER proposes development in electrochemical CO2reduction for industrial applications.

    DOI： 10.1021/acsaem.2c01564

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  5. Synthesis and Properties of Fluorocarbon–Hydrocarbon Hybrid Block Copolymers with Perfluorosulfonimide Acid Reviewed

      Vol. 5 ( 43 ) page： 27766 - 27773   2020.10

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

  6. Nanocomposites Based on Organic and Inorganic Materials and Their unique Properties and Functions

    Masaya Kawsasumi

    R&D Review of Toyota CRDL   Vol. 50 ( 2 ) page： 45 - 61   2019

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    Authorship：Lead author   Publishing type：Research paper (bulletin of university, research institution)  

  7. Properties of a Novel Imide Network Polymer Electrolyte and Fuel Cell Performance of Its Composite Membrane

    Kyoko Tsusaka, Naoki Kitano, Takashi Yamamoto, Naoki Hasegawa, Akihiko Koiwai, Masaya Kawasumi

    R&D Review of Toyota CRDL   Vol. 49 ( 4 ) page： 21 - 31   2018

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    Language：English   Publishing type：Research paper (bulletin of university, research institution)  

  8. Imide Crosslinked Perfluorinated Proton Exchange Membranes by Gas Treatment

    Tsusaka Kyoko, Yamamoto Takashi, Asano Takashi, Muto Atsuko, Hasegawa Naoki, Kawasumi Masaya

    JOURNAL OF THE ELECTROCHEMICAL SOCIETY   Vol. 163 ( 5 ) page： F372 - F376   2016

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1149/2.0491605jes

    Web of Science

  9. Imide Crosslinked Perfluorinated Proton Exchange Membranes by Gas Treatment Reviewed

    Kyoko Tsusaka, Takashi Yamamoto, Takashi Asano, Atsuko Muto, Naoki Hasegawa, Masaya Kawasumi

    Journal of The Electrochemical Society   Vol. 163 ( 5 ) page： 372 - 376   2016

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    Language：English  

    DOI： 10.1149/2.0491605je

  10. スルホン酸修飾メソポーラスシリカ(乾燥状態)のプロトンダイナミクス

    蒲沢 和也, 藤田 悟, 荒木 暢, 長谷川 直樹, 川角 昌弥, Madhusudan Tyagi, 杉山 純

    日本物理学会講演概要集   Vol. 69.2.4   2014.8

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    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    DOI： https://doi.org/10.11316/jpsgaiyo.69.2.4.0_522_1

  11. Ion Conductive Organic-inorganic Hybrid Electrolyte with Meso-scale Proton Channels for Fuel Cells

    Satoru Fujita, Kazuya Kamazawa, Satoru Yamamoto, Akihiko Koiwai, Shinji Inagaki, Jun Sugiyama, Masaya Kawasumi

    R&D Review of Toyota CRDL   Vol. 44 ( 4 ) page： 59 - 69   2014

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    Language：English   Publishing type：Research paper (bulletin of university, research institution)  

    Other Link： https://www.tytlabs.co.jp/en/review/issue/files/454_059fujita.pdf

  12. Non-crosslinked perfluoro-polymer electrolytes with two acid groups and their properties

    Akihiro Shinohara, Kenji Kudo, Masaya Kawasumi, Yu Morimoto, Naoki Hasegawa

    ECS Transactions   Vol. 58 ( 1 ) page： 253 - 259   2013.8

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    Authorship：Corresponding author   Language：English  

    DOI： 10.1149/05801.0253ecst

  13. Enhancement of Proton Transport by High Densification of Sulfonic Acid Groups in Highly Ordered Mesoporous Silica

    Fujita Satoru, Koiwai Akihiko, Kawasumi Masaya, Inagaki Shinji

    CHEMISTRY OF MATERIALS   Vol. 25 ( 9 ) page： 1584 - 1591   2013.5

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/cm303950u

    Web of Science

  14. Proton conductivity under dry conditions for mesoporous silica with highly dense sulfonic acid groups

    Fujita S., Kamazawa K., Yamamoto S., Tyagi M., Araki T., Sugiyama J., Hasegawa N., Kawasumi M.

    Journal of Physical Chemistry C   Vol. 117 ( 17 ) page： 8727 - 8736   2013.5

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Journal of Physical Chemistry C  

    Highly dense sulfonic acid-functionalized mesoporous electrolytes with high proton conductivity under dry conditions were prepared using tetramethoxysilane and 3-mercaptopropyltrimethoxysilane in the presence of surfactants. Impedance spectroscopy and quasielastic neutron scattering measurements showed that the proton conductive properties of the mesoporous electrolytes depended significantly on the sulfonic acid densities on the surface of the mesoporous walls. This finding was also supported by molecular dynamics simulations. The proton conductivity of the mesoporous electrolyte with the highest acid density of 3.1 SO3H molecules/nm2 showed a value of 0.3 mS/cm at 433 K even under dry conditions. This value was higher than that for Nafion by about 2 orders of magnitude. Such high proton conductivity is thought to be induced by proton hopping in the hydrogen-bonded networks that were predominantly formed by neighboring sulfonic acid groups. © 2013 American Chemical Society.

    DOI： 10.1021/jp307058s

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  15. Development and applications of polyolefin- and rubber-clay nanocomposites

    Kato M., Usuki A., Hasegawa N., Okamoto H., Kawasumi M.

    Polymer Journal   Vol. 43 ( 7 ) page： 583 - 593   2011.7

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Polymer Journal  

    A nylon 6-clay hybrid (nanocomposite, NCH) was developed by Toyota CRDL group. In the NCH, the silicate layers of clay mineral are dispersed on a nanometer level and are strongly interacted with the matrix, and then significant improvements in the mechanical properties of the material or the discovery of unexpected new properties were realized. Polypropylene (PP) is the most widely used polymer, and then an appearance of a PP-clay nanocomposite has been desired for a long time. As a PP does not include any polar groups in its backbone, it was thought that the homogeneous dispersion of the silicate layers would not be realized. But we have developed successfully PP-clay nanocomposite using organoclay and modified PP. That is, organophilic clay, PP oligomer carrying polar groups and PP were melt-blended. This is a direct polymer intercalation process for preparing polymer nanocomposites by melt compounding, a useful process from an industrial standpoint. We have also developed successfully other polyolefin polymers (polyethylene), polyolefin rubbers (ethylene-propylene elastomer, ethylene-propylene diene monomer) and nanocomposites by this direct polymer intercalation process or by techniques based on direct polymer intercalation process. These prepared polyolefin nanocomposites exhibit superior mechanical, thermal and gas barrier properties. © The Society of Polymer Science, Japan (SPSJ) All rights reserved.

    DOI： 10.1038/pj.2011.44

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  16. フッ素・炭化水素ブロック共重合電解質膜の合成と評価

    星川尚弘， 篠原朗大， 細川洋一， 長谷川直樹， 川角昌弥

    高分子学会予稿集     page： 4686 - 4686   2010

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    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

  17. Angular distribution of elemental composition of films deposited by laser ablation of a SrZr O<inf>3</inf> target

    Konomi I., Motohiro T., Horii M., Kawasumi M.

    Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films   Vol. 26 ( 6 ) page： 1455 - 1461   2008.11

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films  

    The angular distributions of elemental composition of films prepared by laser ablation of perovskite oxide SrZrO3 have been investigated using electron probe microanalysis with wavelength-dispersive spectroscopy. Each constituent element showed two modal distribution composed of a broad cos m θ (m=2-3) distribution and a sharp cosn θ (n=8-23) distribution. Oxygen showed a broader distribution than that of Sr and Zr. At the polar angle close to surface normal direction (polar angle <12°), Zr concentration was higher than that of Sr in vacuum whereas in oxygen-containing atmosphere their concentrations were about the same. Below oxygen pressure of 1.3 Pa, Sr and Zr concentration increased and decreased with the increase in polar angle, respectively, whereas in oxygen partial pressure of 10 Pa, both elements showed no angular dependences. Broadening of angular distribution of all the elements was observed when deposition was performed under oxygen partial pressure of 10 Pa, which is considered to be caused by collisional scatterings of more than ten times with ambient gas molecules. © 2008 American Vacuum Society.

    DOI： 10.1116/1.2987952

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  18. Electrode and Membrane Durability Issues of PEFCs

    Hatanaka Tatsuya, Takeshita Tomohiro, Murata Hajime, Hasegawa Naoki, Asano Takashi, Kawasumi Masaya, Morimoto Yu

    PROTON EXCHANGE MEMBRANE FUEL CELLS 8, PTS 1 AND 2   Vol. 16 ( 2 ) page： 1961 - 1965   2008

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1149/1.2982036

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  19. Degradation of Perfluorinated Membranes Having Intentionally Formed Pt-Band

    Hasegawa Naoki, Asano Takashi, Hatanaka Tatsuya, Kawasumi Masaya, Morimoto Yu

    PROTON EXCHANGE MEMBRANE FUEL CELLS 8, PTS 1 AND 2   Vol. 16 ( 2 ) page： 1713 - 1716   2008

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：ECS Transactions  

    DOI： 10.1149/1.2982012

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  20. Study on water content of perfluorosulfonic acid ionomer membranes below water freezing point

    A. Koiwai, A. Kamiya and M. Kawasumi

      Vol. 11 ( 1 ) page： 587 - 587   2007.9

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1149/1.2780972

  21. Degradation of Nafion Membranes in Hydrogen Peroxide

    K. Kodama, F. Miura, N. Hasegawa, M Kawasumi and Y. Morimoto

    ECS Meeting Abstracts   Vol. MA2005-02 ( X2 - Durability and Reliability of Low-Temperature Fuel Cells and Fuel Cell Systems ) page： 1185 - 1185   2006

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    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1149/MA2005-02/33/1185

  22. The discovery of polymer-clay hybrids

    Kawasumi M

    JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY   Vol. 42 ( 4 ) page： 819 - 824   2004.2

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/pola.10961

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  23. Cell performances of direct methanol fuel cells with grafted membranes

    Hatanaka T, Hasegawa N, Kamiya A, Kawasumi M, Morimoto Y, Kawahara K

    FUEL   Vol. 81 ( 17 ) page： 2173 - 2176   2002.12

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/S0016-2361(02)00164-3

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  24. Polyolefin-clay hybrids based on modified polyolefins and organophilic clay

    Hasegawa N., Okamoto H., Kawasumi M., Kato M., Tsukigase A., Usuki A.

    Macromolecular Materials and Engineering   Vol. 280-281 ( 7-8 ) page： 76 - 79   2000

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Macromolecular Materials and Engineering  

    A novel and general approach to prepare polyolefin-clay hybrids by using the maleic anhydride modified polyolefins and organophilic clay during melt-blending was reported. The silicate layers of the clay were exfoliated and homogeneously dispersed at the monolayers in the hybrids. The hybrids exhibited remarkable reinforcement compared to conventional composites filled with talc which were dispersed at micrometer level.

    DOI： 10.1002/1439-2054(20000801)280:1<76::aid-mame76>3.0.co;2-#

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  25. Electro-Rheological Behavior of Liquid Crystal Polymers (LCPs) Dissolved in a Nematic Solvent: Dependence on Temperature and LCP Structure

    Y.-C. Chiang, A. M. Jamieson, S. Campbell, T. H. Tong, N. D. Sidocky, L. C. Chien, M. Kawasumi, V. Percec

    Polymer   Vol. 41 ( 11 ) page： 4127 - 4135   2000

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  26. Preparation and mechanical properties of polystyrene-clay hybrids

    Hasegawa N, Okamoto H, Kawasumi M, Usuki A

    JOURNAL OF APPLIED POLYMER SCIENCE   Vol. 74 ( 14 ) page： 3359 - 3364   1999.12

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/(SICI)1097-4628(19991227)74:14<3359::AID-APP9>3.0.CO;2-2

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  27. Preparation and mechanical properties of polystyrene-clay hybrids.

    Hasegawa N, Okamoto H, Kawasumi M, Usuki A

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   Vol. 217   page： U411 - U411   1999.3

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    Language：English   Publishing type：Research paper (scientific journal)  

    Web of Science

  28. Liquid Crystal/Clay Mineral Composites

    Masaya Kawasumi, Naoki Hasegawa, Arimitsu Usuki, Akane Okada

    Applied Clay Science   Vol. 15 ( 1-2 ) page： 93 - 108   1999

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    Language：English  

  29. Nematic liquid crystal/clay mineral composites

    Kawasumi M, Hasegawa N, Usuki A, Okada A

    MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS   Vol. 6 ( 2-3 ) page： 135 - 143   1998.11

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/S0928-4931(98)00045-9

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  30. Preparation and mechanical properties of polypropylene-clay hybrids using a maleic anhydride-modified polypropylene oligomer

    Hasegawa N, Kawasumi M, Kato M, Usuki A, Okada A

    JOURNAL OF APPLIED POLYMER SCIENCE   Vol. 67 ( 1 ) page： 87 - 92   1998.1

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    Language：English   Publishing type：Research paper (scientific journal)  

    Web of Science

  31. Preparation and mechanical properties of polypropylene-clay hybrids

    Kawasumi M, Hasegawa N, Kato M, Usuki A, Okada A

    MACROMOLECULES   Vol. 30 ( 20 ) page： 6333 - 6338   1997.10

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/ma961786h

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  32. Effect of Molecular Architecture on the Electrorheological Behavior of Liquid Crystal Polymers in Nematic Solvents

    Y.-C. Chiang, A. M. Jamieson, S. Campbell, Y. Lin, N. O’Sidocky, L.-C. Chien, M. Kawasumi, V. Percec

    Rheologica Acta   Vol. 36 ( 5 ) page： 505 - 512   1997

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    Language：English  

  33. Electrorheological Behavior of Main-Chain Liquid Crystal Polymers Dissolved in Nematic Solvents

    Y.-C. Chiang, A. M. Jamieson, M. Kawasumi, V. Percec

    Macromolecules   Vol. 30 ( 7 ) page： 992 - 1996   1997

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    Language：English  

  34. Preparation and Mechanical Properties of Polypropylene-Clay Hybrids Reviewed

    Masaya Kawasumi, Naoki Hasegawa, Makoto Kato, Arimitsu Usuki, Akane Okada

    Macromolecules   Vol. 30 ( 20 ) page： 6333 - 6338   1997

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    Language：English  

    DOI： https://doi.org/10.1021/ma961786h

  35. The Difference of Polymer Education in Graduate Schools between U.S.A. and Japan

    KAWASUMI Masaya

      Vol. 45 ( 10 ) page： 735   1996.10

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    CiNii Research

  36. Novel memory effect found in nematic liquid crystal/ fine particle system

    Kawasumi M., Hasegawa N., Usuki A., Okada A.

    Liquid Crystals   Vol. 21 ( 6 ) page： 769 - 776   1996

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Liquid Crystals  

    Novel liquid crystalline composites composed of a nematic two-frequency-addressing liquid crystal and organized clay mineral (about 1 wt %) have been prepared. The particles of clay mineral were dispersed homogeneously in the liquid crystal. The composite cells became transparent within 50ms when a 60 Hz electric field was applied. The transparent state was maintained after the field was switched off. It transformed into a turbid light scattering state by applying 1.5kHz electric field which caused dynamic scattering in the cell. The light transmittance of both memory states did not change after 20 h without the electric field. © 2006 Taylor & Francis.

    DOI： 10.1080/02678299608032892

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  37. Reversible Electro-optical Switching of Memory Type PDLC by Two-frequency-driving

    HASEGAWA Naoki, KAWASUMI Masaya, USUKI Arimitsu, OKADA Akane

    Preprints of symposium on liquid crystals   Vol. 22 ( 0 ) page： 399 - 400   1996

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    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：The Japanese Liquid Crystal Society  

    A memory type PDLC have been prepared by sandwiching a mixture of two-frequency-addressing liquid crystals and acrylate monomers with hydoroxy group between two glass substrates with ITO electrodes followed by the UV irradiation. This PDLC can be electrically switched between the transparent state and the light scattering state, which are maintained over months without electric field. This PDLC exhibited a polymer ball morphology according to SEM observation.

    DOI： 10.11538/ekitouyokou.22.0_399

    CiNii Research

  38. The Factors Affecting The Electro-optic Effect of Nematic Liquid Crystal / Fine Particles Composites System

    KAWASUMI Masaya, HASEGAWA Naoki, USUKI Arimitsu, OKADA Akane

    Preprints of symposium on liquid crystals   Vol. 22 ( 0 ) page： 397 - 398   1996

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    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：The Japanese Liquid Crystal Society  

    The novel liquid crystalline composites cell based on a nematic two-frequency-driving liquid crystal and organized clay exhibited reversible and bistable electro-optic effects between the transparent and light scattering states. In this paper, the factors affecting the electro-optic effect of the composites were investigated. The wettability of the liquid crystal on the organized clay strongly affected to their memory capability. The memory effect decreased drastically with decreasing the clay content in the composites with clay content below 1 wt.%. Not only the composites themselves but also the treatment of the substrates affected to the electro-optic effect. The treatment for the homogeneous alignment gave the better memory effect for the transparent state.

    DOI： 10.11538/ekitouyokou.22.0_397

    CiNii Research

  39. 大学大学院における高分子教育

    岡田 守, 板垣 秀幸, 伊藤 浩一, 川上 雄資, カートハウス オラフ, 川角 昌弥, 金 仁華

    高分子   Vol. 45 ( 10 ) page： 729 - 735   1996

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：公益社団法人 高分子学会  

    DOI： 10.1295/kobunshi.45.729

    CiNii Research

  40. Liquid crystalline composite based on a clay mineral

    Kawasumi M, Usuki A, Okada A, Kurauchi T

    MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS   Vol. 281   page： 91 - 103   1996

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1080/10587259608042236

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  41. Reversible Electro-Optical Switching of a Memory Type PDLC Memory Using Two-Frequency-Addressing Liquid Crystals

    Naoki Hasegawa, Masaya Kawasumi, Arimitsu Usuki, Akane Okada

    Liquid Crystals   Vol. 21 ( 5 ) page： 765 - 766   1996

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  42. Novel memory effect found in nematic liquid crystal clay mineral composites Reviewed International journal

    Kawasumi M, Hasegawa N, Usuki A, Okada A, Kurauchi T

    LIQUID CRYSTALS FOR ADVANCED TECHNOLOGIES   Vol. 425   page： 311 - 316   1996

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    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1557/PROC-425-311

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  43. Reversible electro-optical switching of a memory type pdlc memory using two-frequency-addressing liquid crystals memory on- state ii International journal

    Hasegawa N., Kawasumi M., Usuki A., Okada A.

    Liquid Crystals   Vol. 21 ( 5 ) page： 765 - 766   1996

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Liquid Crystals  

    A memory type PDLC has been prepared by sandwiching a mixture of two-frequencyaddressing liquid crystals and acrylate monomers with a hydoroxy group between two glass substrates with IT0 electrodes followed by UV irradiation. This PDLC can be electrically switched between a transparent state and a light scattering state, which are maintained over several months without electric fields. © 2006 Taylor & Francis.

    DOI： 10.1080/02678299608032890

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  44. ジアミン変性ナイロン6-粘土ハイブリッドの合成と特性

    臼杵 有光, 川角 昌弥, 小島 由継, 岡田 茜, 倉内 紀雄

    高分子論文集   Vol. 52 ( 7 ) page： 440-444   1995.7

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  45. Molecular Structure of Nylon in Nylon 6-Clay Hybrid

    USUKI Arimitsu, KAWASUMI Masaya, KOJIMA Yoshitsugu, OKADA Akane, KURAUCHI Toshio, OGAWA Tadao, ARAGA Toshimi

      Vol. 52 ( 5 ) page： 299-304   1995.5

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  46. Novel preferred orientation in injection‐molded nylon 6‐clay hybrid

    Kojima Y., Usuki A., Kawasumi M., Okada A., Kurauchi T., Kamigaito O., Kaji K.

    Journal of Polymer Science Part B: Polymer Physics   Vol. 33 ( 7 ) page： 1039 - 1045   1995.5

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Journal of Polymer Science Part B: Polymer Physics  

    Nylon 6‐clay hybrid (NCH) is a molecular composite of Nylon 6 and uniformly dispersed silicate monolayers of montmorillonite. In this study the preferred orientation of montmorillonite and Nylon‐6 crystallites in a thick (3 mm) injection‐molded bar of NCH has been investigated using x‐ray diffraction and electron micrography (TEM). It is clear that this bar has a triple layer structure consisting of surface, intermediate, and middle layers which have different preferred orientation. In the surface layer both the silicate monolayers and the chain axes of Nylon‐6 crystallites are parallel to the bar surface though the latter are randomly oriented within the plane. In the intermediate layer the silicate monolayers remain parallel to the bar surface but the Nylon‐6 crystallites rotate by 90° so that the chain axes would be perpendicular to the bar surface or the silicate monolayers. In the middle layer the silicate monolayers are randomly oriented around the flow axis of the NCH bar while remaining parallel to it, and the Nylon crystallites are randomly oriented around the flow axis while keeping their chain axes perpendicular to the silicate monolayers. It may be concluded that such preferred orientation of Nylon 6 crystallites is induced by the clay because the crystallites in the pure Nylon 6 bar have no preferred orientation. ©1995 John Wiley & Sons, Inc. Copyright © 1995 John Wiley & Sons, Inc.

    DOI： 10.1002/polb.1995.090330707

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  47. Interaction of nylon 6‐clay surface and mechanical properties of nylon 6‐clay hybrid

    Usuki A., Koiwai A., Kojima Y., Kawasumi M., Okada A., Kurauchi T., Kamigaito O.

    Journal of Applied Polymer Science   Vol. 55 ( 1 ) page： 119 - 123   1995.1

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Journal of Applied Polymer Science  

    We synthesized nylon 6‐clay hybrid materials using four types of clay minerals, montmorillonite, saponite, hectrite, and synthetic mica. The mechanical properties of their injection molded specimens were measured according to ASTM. Nylon 6‐clay hybrid using montmorillonite was superior to the other hybrids in mechanical properties. This might result from the difference in the interaction between nylon molecules and silicates in the hybrids. To clarify this hypothesis, we synthesized intercalated compounds of the clay minerals with glycine as the model of the hybrids, and analyzed the interaction using 15N cross polarization magic angle spinning (CP/MAS) NMR spectroscopy. The 15N‐NMR result reveals that the positive charge density on the nitrogen of the intercalated compound based on montmorillonite was largest in all the intercalated compounds. It was suggested that montmorillonite interacted strongly with nylon 6 by ionic interaction. This ionic interaction was one of the reasons why these hybrid materials had superior mechanical properties. © 1995 John Wiley & Sons, Inc. Copyright © 1995 John Wiley & Sons, Inc.

    DOI： 10.1002/app.1995.070550113

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  48. Liquid Crystalline Polymers with Cyclic and Hyperbranched Structures

    KAWASUMI Masaya

    Kobunshi   Vol. 44 ( 7 ) page： 448 - 448   1995

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Society of Polymer Science, Japan  

    DOI： 10.1295/kobunshi.44.448

    CiNii Research

  49. Viscoelastic Properties of Dilute Nematic Mixtures Containing Cyclic and Hyperbranched Liquid Crystal Polymers Dissolved in a Nematic Solvent

    Fu‐Lung ‐L Chen, A. M. Jamieson, M. Kawasumi, V. Percec

    Journal of Polymer Science Part B: Polymer Physics   Vol. 33 ( 8 ) page： 1213 - 1223   1995

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  50. Conformational Behavior of the Spacer in a Liquid Crystalline Main-Chain Polymer in Its Nematic and Glassy States

    J. Leisen, C. Boeffel, H. W. Spiess, D. Y. Yoon, M. H. Sherwood, M. Kawasumi, V. Percec

    Macromolecules   Vol. 28 ( 20 ) page： 6937 - 6941   1995

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  51. SANS Study of a Semiflexible Main Chain Liquid Crystalline Polyether

    F. Hardouin, G. Sigaud, M. F. Achard, A. BrÛlet, J. P. Cotton, D. Y. Yoon, V. Percec, M. Kawasumi

    Macromolecules   Vol. 28 ( 16 ) page： 5427 - 5433   1995

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  52. Synthesis and Properties of Diamine-Modified Nylon 6-Clay Hybrid.

    USUKI Arimitsu, KAWASUMI Masaya, KOJIMA Yoshitsugu, OKADA Akane, KURAUCHI Toshio

    KOBUNSHI RONBUNSHU   Vol. 52 ( 7 ) page： 440 - 444   1995

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Society of Polymer Science, Japan  

    In this report, we added hexamethylene diamine (HMDA) to nylon 6-clay hybrid (NCH), in which some silicate layers were laminated and these laminated layers were dispersed in the nylon 6 matrix. The diamine-modified NCH had sufficient elongation and impact strength. However, the strength and modulus slightly decreased. The silicate layers were pillared by diammonium ion of the diamine in the diamine-modified NCH. It is considered that the decrease of mechanical properties results in a lowering of the surface area between the silicate layers and nylon 6.

    DOI： 10.1295/koron.52.440

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  53. Molecular Structure of Nylon in Nylon 6-Clay Hybrid.

    USUKI Arimitsu, KAWASUMI Masaya, KOJIMA Yoshitsugu, OKADA Akane, KURAUCHI Toshio, OGAWA Tadao, ARAGA Toshimi

    KOBUNSHI RONBUNSHU   Vol. 52 ( 5 ) page： 299 - 304   1995

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Society of Polymer Science, Japan  

    The molecular structure of nylon in nylon 6-clay hybrid (NCH), in which clay silicates were dispersed uniformly, was analyzed using a field desorption mass spectrometer. The main peaks of fragment ions from the mass spectrum of NCH, were classified into ion groups. Two possible molecular structures of NCH were postulated supposing different locations of the copolymerized nylon 12 monomer unit (12-aminolauric acid) which was intercalated in the clay prior to the polymerization to enhance the miscibility between the clay and nylon 6. We compared the experimental fragment ion groups with those from the expected structures. From these results, it became clear that nylon 12 monomer units did not exist only at the end of nylon 6, but also occur randomly along the nylon 6 main chain. NCH without having any 12-aminolauric acid units was proved to have improved thermal properties.

    DOI： 10.1295/koron.52.299

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  54. FINE-STRUCTURE OF NYLON-6-CLAY HYBRID Reviewed International journal

    KOJIMA Y, USUKI A, KAWASUMI M, OKADA A, KURAUCHI T, KAMIGAITO O, KAJI K

    JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS   Vol. 32 ( 4 ) page： 625 - 630   1994.3

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    DOI： 10.1002/polb.1994.090320404

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  55. Molecular Recognition Directed Self-Assembly of Supramolecular Architectures

    V. Percec, J. Heck, G. Johansson, D. Tomazos, M. Kawasumi, P. Chu, G. Ungar

    Journal of Macromolecular Science, Part A   Vol. 31 ( 11 ) page： 1719 - 1758   1994

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  56. Molecular Order in the Nematic Melt of a Semiflexible Polyether by Deuteron NMR

    M. H. Sherwood, G. Sigaud, D. Y. Yoon, C. G. Wade, M. Kawasumi, V. Percec

    Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals   Vol. 254 ( 1 ) page： 455 - 468   1994

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  57. At the Borderline Between Glassy, Crystalline and Liquid Crystalline Macrocyclics

    V. Percec, M. Kawasumi

    Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals   Vol. 238 ( 1 ) page： 21 - 37   1994

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  58. Toward ‘Willowlike’ Thermotropic Dendrimers Reviewed

    V. Percec, P. Chu, M. Kawasumi

    Macromolecules   Vol. 27 ( 16 ) page： 4441 - 4453   1994

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  59. Molecular Recognition Directed Self-Assembly of Supramolecular Liquid Crystals

    V. Percec, J. Heck, G. Johansson, D. Tomazos, M. Kawasumi, P. Chu, G. Ungar

    Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals   Vol. 254 ( 1 ) page： 137 - 196   1994

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  60. SORPTION OF WATER IN NYLON-6 CLAY HYBRID

    KOJIMA Y, USUKI A, KAWASUMI M, OKADA A, KURAUCHI T, KAMIGAITO O

    JOURNAL OF APPLIED POLYMER SCIENCE   Vol. 49 ( 7 ) page： 1259 - 1264   1993.8

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    DOI： 10.1002/app.1993.070490715

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  61. One‐pot synthesis of nylon 6–clay hybrid International journal

    Kojima Y., Usuki A., Kawasumi M., Okada A., Kurauchi T., Kamigaito O.

    Journal of Polymer Science Part A: Polymer Chemistry   Vol. 31 ( 7 ) page： 1755 - 1758   1993.6

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Journal of Polymer Science Part A: Polymer Chemistry  

    Nylon 6–clay hybrid is a molecular composite of nylon 6 and uniformly dispersed silicate layers of montmorillonite. One‐pot synthesis of the hybrid was carried out by the following procedures. Montmorillonite was dispersed in water, and then ε‐caprolactam, acid (phosphoric acid, hydrochloric acid, benzenesulfonic acid, isophthalic acid, trichloroacetic acid, or acetic acid), and 6‐aminocaproic acid were added to the dispersion. The mixtures were reacted at 260°C for 6 h, yielding the nylon 6–clay hybrids (1potNCHs). X‐ray diffraction revealed that the silicate layers of 1potNCH by phosphoric acid were uniformly dispersed in the nylon 6 matrix. The 1potNCH had excellent mechanical properties. The strength and the modulus of the hybrid increased compared with previously reported nylon 6–clay hybrid (NCH) synthesized by montmorillonite intercalated with 12‐aminolauric acid. The heat distortion temperature (HDT) of the 1potNCH was 160°C, which was 8°C higher than that of NCH. In other 1potNCHs, montmorillonite had a smaller effect on the increase of those properties, and interlayer spacing of montmorillonite was observed at ca. 20 Å. © 1993 John Wiley & Sons, Inc. Copyright © 1993 John Wiley & Sons, Inc.

    DOI： 10.1002/pola.1993.080310714

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  62. MECHANICAL-PROPERTIES OF NYLON 6-CLAY HYBRID

    KOJIMA Y, USUKI A, KAWASUMI M, OKADA A, FUKUSHIMA Y, KURAUCHI T, KAMIGAITO O

    JOURNAL OF MATERIALS RESEARCH   Vol. 8 ( 5 ) page： 1185 - 1189   1993.5

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    DOI： 10.1557/JMR.1993.1185

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  63. SWELLING BEHAVIOR OF MONTMORILLONITE CATION EXCHANGED FOR OMEGA-AMINO ACIDS BY EPSILON-CAPROLACTAM Reviewed

    USUKI A, KAWASUMI M, KOJIMA Y, OKADA A, KURAUCHI T, KAMIGAITO O

    JOURNAL OF MATERIALS RESEARCH   Vol. 8 ( 5 ) page： 1174 - 1178   1993.5

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    DOI： 10.1557/JMR.1993.1174

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  64. SYNTHESIS OF NYLON 6-CLAY HYBRID

    USUKI A, KOJIMA Y, KAWASUMI M, OKADA A, FUKUSHIMA Y, KURAUCHI T, KAMIGAITO O

    JOURNAL OF MATERIALS RESEARCH   Vol. 8 ( 5 ) page： 1179 - 1184   1993.5

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    DOI： 10.1557/JMR.1993.1179

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  65. Synthesis of nylon 6–clay hybrid by montmorillonite intercalated with ϵ‐caprolactam International journal

    Kojima Y., Usuki A., Kawasumi M., Okada A., Kurauchi T., Kamigaito O.

    Journal of Polymer Science Part A: Polymer Chemistry   Vol. 31 ( 4 ) page： 983 - 986   1993.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Journal of Polymer Science Part A: Polymer Chemistry  

    It was found that montmorillonite was intercalated with ϵ‐caprolactam. X‐ray diffraction revealed that the chain axes of the ϵ‐caprolactam were parallel to the montmorillonite plates. The intercalated montmorillonite was swollen by molten ϵ‐caprolactam at 200°C. ϵ‐Caprolactam and 6‐aminocaproic acid (accelerator) were polymerized with the intercalated montmorillonite at 260°C for 6 h, yielding a nylon 6‐clay hybrid. X‐ray diffraction and transmission electron micrography revealed that the silicate layers of the hybrid were uniformly dispersed in the nylon 6 matrix. Mechanical properties of the hybrid were improved. The strength and the modulus of the hybrid increased compared with the previously reported nylon 6 clay‐hybrid (NCH) synthesized by montmorillonite intercalated with 12‐aminolauric acid. The heat distortion temperature (HDT) of the hybrid was 164°C, which was 12°C higher than that of NCH. © 1993 John Wiley & Sons, Inc. Copyright © 1993 John Wiley & Sons, Inc.

    DOI： 10.1002/pola.1993.080310418

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  66. Gas Barrier Properties of Nylon 6-Clay Hybrid.

    KOJIMA Yoshitsugu, USUKI Arimitsu, KAWASUMI Masaya, OKADA Akane, KURAUCHI Toshio, KAMIGAITO Osami

    Materials life   Vol. 5 ( 1/2 ) page： 13 - 17   1993

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：MATERIALS LIFE SOCIETY, JAPAN  

    Nylon 6-clay hybrid (NCH) is a molecular composite of nylon 6 and uniformly-dispersed silicate layers of montmorillonite. Gas permeabilities in NCH films were measured to estimate the gas barrier properties. Montmorillonite crystal layers assume planar orientation in NCH. Crystallinity of nylon 6 in NCH was a little larger than that of nylon 6. The gas permeability in NCH decreased with the increase in the montmorillonite content. NCH had a good gas barrier properties compared with nylon 6. The superior gas barrier properties of NCH are ascribed to the increase of tortuosity factor due to the planar orientation of montmorillonite crystal layers.

    DOI： 10.11338/mls1989.5.13

    CiNii Research

  67. Synthesis and Liquid Crystallinity of Cyclic Polyethers Containing Mesogenic Units in Their Main Chains

    KAWASUMI Masaya, PERCEC Virgil

    Preprints of symposium on liquid crystals   Vol. 19 ( 0 ) page： 208 - 209   1993

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japanese Liquid Crystal Society  

    DOI： 10.11538/ekitouyokou.19.0_208

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  68. Liquid-Crystalline Polyethers Based on Conformational Isomerism. 31. Absence of Chiral Molecular Recognition in Irregular Linear and Macrocyclic Liquid-Crystalline Polyethers Based on 1-(4-Hydroxy-4’-Biphenylyl)-2-(4-Hydroxyphenyl) butane and α,ω-Dibromoalkanes

    V. Percec, M. Kawasumi

    Macromolecules   Vol. 26 ( 15 ) page： 3917 - 3928   1993

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  69. Mechanical Properties of Nylon 6-Clay Hybrid Reviewed

    Yoshitsugu Kojima, Arimitsu Usuki, Masaya Kawasumi, Akane Okada, Yoshiaki Fukushima, Toshio Kurauchi, Osami Kamigaito

    Journal of Materials Research   Vol. 8 ( 5 ) page： 1185 - 1189   1993

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  70. Synthesis of Nylon 6-Clay Hybrid Reviewed

    Arimitsu Usuki, Yoshitsugu Kojima, Masaya Kawasumi, Akane Okada, Yoshiaki Fukushima, Toshio Kurauchi, Osami Kamigaito

    Journal of Materials Research   Vol. 8 ( 5 ) page： 1179 - 1184   1993

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  71. Swelling Behavior of Montmorillonite Cation Exchanged for ω-Amino Acids by ε-Caprolactam

    Arimitsu Usuki, Masaya Kawasumi, Yoshitsugu Kojima, Akane Okada, Toshio Kurauchi, Osami Kamigaito

    Journal of Materials Research   Vol. 8 ( 5 ) page： 1174 - 1178   1993

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  72. Macrocycles with Clearing Temperatures Higher than Their Linear High-Molecular-Weight Homologues

    V. Percec, M. Kawasumi

    Journal of Materials Chemistry   Vol. 3 ( 7 ) page： 725 - 734   1993

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  73. Similarities and Differences between the Mesomorphic Behavior of Oligomeric Macrocyclics and of Linear High Relative Molecular Mass Polyethers Based on 1-(4’-Hydroxybiphenyl-4-yl)-2-(4-Hydroxyphenyl) butane and Flexible Spacers

    V. Percec, M. Kawasumi

    Journal of the Chemical Society, Perkin Transactions   Vol. 1 ( 12 ) page： 1319 - 1334   1993

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  74. Transformation of a Kinetically Controlled Nematic Phase of a Linear Polymer into One Which Is Thermodynamically Controlled via Cyclization

    V. Percec, M. Kawasumi

    Liquid Crystals   Vol. 13 ( 1 ) page： 83 - 94   1993

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  75. Liquid Crystalline Polyethers Based on Conformational Isomerism. Part 28. Noncrystallizable Macrocyclics Exhibiting Enantiotropic Liquid-Crystalline Phases

    V. Percec, M. Kawasumi

    Chemistry of Materials   Vol. 5 ( 6 ) page： 826 - 834   1993

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  76. Liquid-Crystalline Polyethers Based on Conformational Isomerism. 32. Effect of Molecular Weight on the Phase Behavior of Linear and Macrocyclic Oligoethers and of Linear Polyethers Based on 1-(4-Hydroxy-4’-biphenylyl)-2-(4-hydroxyphenyl) butane and 1,10-Dibromodecane

    V. Percec, M. Kawasumi

    Macromolecules   Vol. 26 ( 14 ) page： 3663 - 3675   1993

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  77. 機能性液晶高分子

    川角 昌弥

    豊田中央研究所R&D レビュー   Vol. 28 ( 4 ) page： 13 - 24   1993

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  78. Dynamic Light Scattering from Nematic Monodomains Containing Mesogenic Polymers of Differing Architectures

    G. Dongfeng, A. M. Jamieson, M. Kawasumi, M. S. Lee, V. Percec

    Macromolecules   Vol. 25 ( 8 ) page： 2151 - 2155   1992

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  79. Synthesis and Characterization of a Thermotropic Nematic Liquid Crystalline Dendrimeric Polymer

    V. Percec, M. Kawasumi

    Advanced Materials   Vol. 4 ( 9 ) page： 572 - 576   1992

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  80. Synthesis and Characterization of Cyclic Liquid Crystalline Oligomers Based on 1-(4-Hydroxy-4’-Biphenylyl)-2-(4-Hydroxyphenyl) butane and 1,10-Dibromodecane Reviewed

    V.　Percec, M. Kawasumi, P. L. Rinaldi, V. E. Litman

    Macromolecules   Vol. 25 ( 15 ) page： 3851 - 3861   1992

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  81. Light Scattering from a Nematic Monodomain in an Electric Field Twist Elastic Constant and Viscosity Coefficient of Nematic Polymer–Solvent Mixtures

    D. F. Gu, A. M. Jamieson, M. S. Lee, M. Kawasumi, V. Percec

    Liquid Crystals   Vol. 12 ( 6 ) page： 961 - 971   1992

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  82. Liquid-Crystalline Polyethers Based on Conformational Isomerism. 18. Polyethers Based on a Combined Mesogenic Unit Containing Rigid and Flexible Groups: 1-(4-Hydroxy-4’-Biphenyl)-2-(4-Hydroxyphenyl) butane

    V. Percec, M. Kawasumi

    Macromolecules   Vol. 24 ( 23 ) page： 6318 - 6324   1991

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  83. Scaling law for elastic modulus in filler-reinforced composite materials Invited Reviewed

    A Koiwai, M Kawasumi, S Hyodo, T Motohiro, S Noda, O Kamigaito

    "Benibana" International Symposium on How to Improve the Toughness of Polymers and Composites--Toughness, Fracture and Fatigue of Polymers and Composites     page： 105 - 110   1990

  84. A solid state NMR study on crystalline forms of nylon 6

    Okada A., Kawasumi M., Tajima I., Kurauchi T., Kamigaito O.

    Journal of Applied Polymer Science   Vol. 37 ( 5 ) page： 1363 - 1371   1989.2

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    High‐resolution 13C‐NMR spectra were studied for two different crystalline structures of nylon 6 in the solid state by the cross polarization/magic angle spinning (CP/MAS) method. Two crystalline structures, α‐form and γ‐form, gave different chemical shifts for methylene carbons. The results showed that the hydrogen bonds between intermolecular chains are stronger in the γ‐form than in the α‐form. This strongly supports the results of the X‐ray study of nylon 6 by Malta et al. Our results also showed that interamolecular delocalization of positive charges occurs in the γ‐form through hyperconjugation in which the dihedral angle between the π bond and neighboring σ bonds is 30° while no such effect can be expected in the α‐form in which the angle is 0°. Copyright © 1989 John Wiley & Sons, Inc.

    DOI： 10.1002/app.1989.070370519

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  85. SWELLING BEHAVIOR OF MONTMORILLONITE BY POLY-6-AMIDE Reviewed International journal

    FUKUSHIMA Y, OKADA A, KAWASUMI M, KURAUCHI T, KAMIGAITO O

    CLAY MINERALS   Vol. 23 ( 1 ) page： 27 - 34   1988.3

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    DOI： 10.1180/claymin.1988.023.1.03

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  86. Vinylbenzyl-type polyamide macromer synthesized from bicyclic oxalactam. Preparation and characterization of graft copolymer composed of polystyrene as a stock and hydrophilic polyamide as branches.

    Hashimoto Kazuhiko, Sumitomo Hiroshi, Kawasumi Masaya

    Polymer Journal   Vol. 17 ( 9 ) page： 1045 - 1054   1985.9

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Society of Polymer Science, Japan  

    Vinylbenzyl-type polyamide macromers (<B>1</B>) of various average molecular weights (<I>M</I><SUB>n</SUB>; 3900, 5400, and 8400) were prepared by the anionic ring-opening polymerization of a bicyclic oxalactam, 8-oxa-6-azabicyclo[3.2.1]octan-7-one (abbreviated as BOL, <B>2</B>) followed by a reaction with <I>p</I>-vinylbenzylamine. The relative reactivity of the macromer (M<SUB>1</SUB>) in the radical copolymerization with styrene (M<SUB>2</SUB>) was found to be lower than that of <I>p</I>-methylstyrene from the estimation of the reciprocal monomer reactivity ratio (1/<I>r</I><SUB>2</SUB>). The resulting graft copolymer composed of a polystyrene stock and polyamide branches was characterized by structural analysis, solubility test, and determination of moisture sorption. Two kinds of transparent binary blend films, which were i) the graft copolymer and homopolystyrene and ii) the graft copolymer and polyBOL, were cast on a glass plate from the corresponding chloroform and chloroform-methanol (9:1) solutions, respectively. In the case of the former film comprising mainly polystyrene, the hydrophilic polyamide segment of the graft copolymer as a really minor component was found to be located on the glass-side surface from the contact angle measurement and the attenuated total reflection-infrared spectroscopy.

    DOI： 10.1295/polymj.17.1045

    Web of Science

    Scopus

    CiNii Research

  87. Preparation of a new polyamide macromer having a vinylbenzyl group from bicyclic oxalactam and its radical copolymerization with styrene

    Hashimoto K.

    Polymer Bulletin   Vol. 11 ( 2 ) page： 121 - 128   1984.2

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1007/BF00258018

    Scopus

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Books 1

  1. 知の挑戦 新しい価値の創造 2014年版

    BPコンサルティング  2014 

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Presentations 27

  1. Polymer Electrolyte Membrane Nano-Coated with Proton-Permeable Two-Dimensional Materials for Enhanced Gas Barrier Property International conference

    Koshi Yamaji, Yue Shi, Minoru Osada, Takahiro Ikeda, Tsuyoshi Hamaguchi, Masaya Kawasumi

    2024.3.6 

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    Event date： 2024.3

    Language：English   Presentation type：Poster presentation  

    Country：Japan  

  2. Fullerene Derivative and Cerium Composite as Radical Quenchers in Nafion Matrix Fuel Cell Membranes

    Ratna Balgis, Kazuhira Miwa, Hibiki Ohashi, Yutaka Matsuo, Masaya Kawasumi

    2024.3.7 

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    Event date： 2024.3

    Language：English   Presentation type：Poster presentation  

    Country：Japan  

  3. Synthesis of sulfonated C60 as a radical quencher for Nafion fuel cell membranes International conference

    Kazuhira Miwa, Ratna Balgis, Hibiki Ohashi, Masaya Kawasumi, Shinobu Aoyagi, Takahiro Sasamori, Hideki Yorimitsu, Yutaka Matsuo

    2024.3.6 

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    Event date： 2024.3

    Language：English   Presentation type：Poster presentation  

    Country：Japan  

  4. Single-walled carbon nanotubes supported Pt electrocatalyst as cathode catalyst of a single fuel cell with high durability against start-up/shut-down potential cycling International conference

    Miftakhul Huda, Tomoya Kawahara, Chu-Yang Yu, Jae-Hyeok Park, Masaya Kawasumi, Yutaka Matsuo

    2024.3.8 

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    Event date： 2024.3

    Language：English   Presentation type：Oral presentation (general)  

    Country：Japan  

  5. Synthesis of Platinum-Palladium bimetallic nanorods supported on Single-Walled Carbon Nanotubes International conference

    Qing Li, Miftakhul Huda, Masaya Kawasumi, Yutaka Matsuo

    2024.3.6 

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    Event date： 2024.3

    Language：English   Presentation type：Poster presentation  

    Country：Japan  

  6. PEFCカソード用カーボンシェルカプセル化PtFe合金触媒の活性及び長期耐久性改善に及ぼすカーボンシェルの効果

    パク ジェヒョク、永宏 齋藤、川角 昌弥

    第54回 中部化学関係学協会支部連合秋季大会  中部化学関係学協会支部連合協議会

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    Event date： 2023.11

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：三重大学   Country：Japan  

  7. ソリューションプラズマ法グラフェンカプセル化PtFe合金触媒の PEFCカソード触媒としての適用可能性検討

    パク ジェヒョク、キム キュソン、ワン シャオヤ、ミフタフル フダ、澤田 康之、松尾 豊、永宏 齋藤、川角 昌弥

    2023電気化学秋期大会  2023.9.11  公益社団法人 電気化学会

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    Event date： 2023.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：福岡県福岡市   Country：Japan  

  8. 水素・燃料電池関連のトレンドや技術開発状況などの概要

    川角　昌弥

    第４回カーボンニュートラル関連技術研究会  科学技術交流財団

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    Event date： 2023.7

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：愛知県名古屋市   Country：Japan  

  9. Enhancement of oxidative stability of Nafion membrane by introduction of fullerene derivatives for high durability of PEFC

    Taichi Shintaku, Jae-Hyeok Park, Yutaka Matsuo, Masaya Kawasumi

    The 63rd Fullerenes-Nanotubes-Graphene General Symposium  2022.9.1 

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    Event date： 2022.8 - 2022.9

    Language：English   Presentation type：Poster presentation  

    Country：Japan  

  10. The performance of Pt nanoparticles supported on Single-Walled Carbon Nanotubes as a single cell of fuel cell

    omoya Kawahara, Miftakhul Huda, Satoru Hashimoto, Masaya Kawasumi, Yutaka Matsuo

    The 63rd Fullerenes-Nanotubes-Graphene General Symposium  2022.8.31  The Fullerenes-Nanotubes-Graphene Society

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    Event date： 2022.8 - 2022.9

    Language：English   Presentation type：Poster presentation  

    Country：Japan  

  11. Synthesis of Pt nanoparticles supported on Single-Walled Carbon Nanotubes and its performance for fuel cell application

    2022.3.3  フラーレン・ナノチューブ・グラフェン学会

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    Event date： 2022.3

    Language：English   Presentation type：Oral presentation (general)  

    Venue：名古屋   Country：Japan  

  12. １００年に一度の自動車産業の大変革　～CASE革命から始まる未来のモビリティー社会、 モノづくりについて～ Invited

    川角　昌弥

    一般社団法人日本金型工業会中部支部　特別講演会  一般社団法人日本金型工業会

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    Event date： 2021.5

    Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Venue：オンライン   Country：Japan  

  13. Material and Process Designs in Toyota Central R&D Laboratories and Industry's Expectation for Materials Genome

    Masaya Kawasumi,

    1st US-Japan Materials Genome Workshop 

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    Event date： 2015

    Language：English   Presentation type：Oral presentation (invited, special)  

  14. 豊田中研におけるナノ材料開発-クレイナノコンポジット材料を中心に-

    川角 昌弥

    次世代ナノテクフォーラム2013 

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    Event date： 2013

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

  15. Nanostructured Ceramics and Hybrid Materials in Toyota Central R&D Labs.

    Masaya Kawasumi

    4th International Congress on Ceramics 

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    Event date： 2012

    Language：English   Presentation type：Oral presentation (invited, special)  

  16. 自動車用燃料電池への取り組み

    川角 昌弥

    東海化学工業会セミナー「次世代自動車:政策展開と電池・軽量化の技術」 

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    Event date： 2010

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

  17. 高分子電解質膜の開発と自動車用燃料電池への展開

    川角 昌弥

    平成20年度　東海シンポジウム、高分子科学による将来展望 -持続型社会での高分子の役割- 

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    Event date： 2009

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

  18. Degradation of Perfluorinated Membranes Having Intentionally Formed Pt-Band

    N. Hasegawa, T. Asano, T. Hatanaka, M. Kawasumi, Y. Morimoto

    ECS Transactions 

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    Event date： 2008

    Language：English  

  19. Electrode and Membrane Durability Issues of PEFCs

    T. Hatanaka, T. Takeshita, H. Murata, N. Hasegawa, T. Asano, M. Kawasumi, Y. Morimoto

    ECS Transactions 

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    Event date： 2008

    Language：English  

  20. 燃料電池用高分子電解質膜

    川角 昌弥

    第38回中部化学関係学協会支部連合秋季大会 

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    Event date： 2007

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

  21. Study on Water Content of Perfluorosulfonic Acid Ionomer Membranes below Water Freezing Point

    A. Koiwai, A. Kamiya, M. Kawasumi

    ECS Transactions 

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    Event date： 2007

    Language：English  

  22. 高温作動用電解質膜の開発

    川角 昌弥

    2007年度高分子学会燃料電池材料研究会講座「電解質膜の最先端」 

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    Event date： 2007

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

  23. Scaling Law for Elastic Modulus in Filler-Reinforced Composite Materials

    A. Koiwai, M. Kawasumi, S. Hyodo, T. Motohiro, S. Noda, O. Kamigaito

    Benibana” International Symposium on How to Improve the Toughness of Polymers and Composites--Toughness, Fracture and Fatigue of Polymers and Composites 

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    Event date： 1990

    Language：English  

  24. Synthesis and Properties of Nylon-6/Clay Hybrids

    A. Okada, M. Kawasumi, A. Usuki, Y. Kojima, T. Kurauchi, O. Kamigaito

    Polymer based molecular composites MRS Symposium Proceedings 

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    Event date： 1990

    Language：English  

  25. CHARACTERIZATION AND PROPERTIES OF NYLON-6 - CLAY HYBRID International conference

    USUKI A, KOJIMA Y, KAWASUMI M, OKADA A, KURAUCHI T, KAMIGAITO O

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY  1990.8.26 

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    Language：English   Presentation type：Oral presentation (general)  

  26. SYNTHESIS AND CHARACTERIZATION OF A NYLON 6-CLAY HYBRID International conference

    OKADA A, KAWASUMI M, KURAUCHI T, KAMIGAITO O

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY  1987.8.30 

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    Language：English   Presentation type：Oral presentation (general)  

  27. Cell performances of direct methanol fuel cells with grafted membranes. International conference

    Hatanaka T, Hasegawa N, Kamiya A, Kawasumi M, Morimoto Y, Kawahara K

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY  2001.8 

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    Language：English   Presentation type：Oral presentation (general)  

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Research Project for Joint Research, Competitive Funding, etc. 2

  1. 高性能・高耐久・低コストMEAに向けた先端要素技術の研究開発

    Grant number：P20003  2020.7

    国立研究開発法人新エネルギー・産業技術総合開発機構  燃料電池等利用の飛躍的拡大に向けた共通課題解決型産学官連携研究開発事業 

    川角　昌弥

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    Grant type：Competitive

  2. 燃料電池の耐久性向上に向けたフラーレン誘導体ラジカルクエンチャーの研究開発

    2022.7

    燃料電池等利用の飛躍的拡大に向けた共通課題解決型産学官連携研究開発事業 

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    Authorship：Coinvestigator(s)  Grant type：Competitive

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Industrial property rights 3

  1. 積層型プロトン伝導性電解質膜およびその製造方法

    川角　昌弥、長田　実、施　越、山路　晃史、山崎　翔也

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    Applicant：国立大学法人東海国立大学機構　株式会社豊田中央研究所

    Application no：2023-116623  Date applied：2023.7

    Rights holder：株式会社豊田中央研究所

  2. 電解質膜、電解質膜の製造方法、及び膜電極接合体

    松尾 豊　川昌弥昌弥

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    Applicant：東海国立大学機構

    Application no：2024-030037   Date applied：2024.2

  3. 触媒、触媒の製造方法、及び燃料電池

    松尾 豊 MIFTAKHUL HUDA 川角 昌弥

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    Applicant：2024-02-27

    Application no：2024-025901  Date applied：2024.2

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Social Contribution 3

  1. 第18回　アカデミックナイト ～グリーン・サステイナブルケミストリー～

    Role(s)：Commentator

    ナゴヤイノベーターズガレージ  アカデミックナイト  2022.2

  2. 第16回　アカデミックナイト ～カーボン・ニュートラル～

    Role(s)：Commentator

    一般社団法人 中部圏イノベーション推進機構  アカデミックナイト  2021.6

  3. 第2回 アカデミックナイト「新構造による高機能化」

    Role(s)：Commentator

    一般社団法人 中部圏イノベーション推進機構  アカデミックナイト  2019.10

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