Koichi Mayumi

Profile Information

Affiliation: Associate Professor, Neutron Science Laboratory, The Institute for Solid State Physics, The University of Tokyo

Degree: Ph. D(Sep, 2011)

Contact information: kmayumiissp.u-tokyo.ac.jp
Researcher number: 30733513
ORCID iD: https://orcid.org/0000-0002-1976-3791
J-GLOBAL ID: 201901020374840408
researchmap Member ID: B000349147

External link: https://kmayumi.issp.u-tokyo.ac.jp/en/

Research Interests

Research Areas

Research History

Nov, 2020 - Present

Associate Professor, Neutron Science Laboratory Affiliated to the ISSP, The University of Tokyo
Mar, 2018 - Oct, 2020

Project Lecturer, Ito and Yokoyama Laboratory, Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo
Apr, 2014 - Feb, 2018

Assistant Professor, Ito and Yokoyama Laboratory, Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo
Apr, 2012 - Mar, 2014

Postdoctoral Researcher, Laboratoire SIMM/PPMD, ESPCI ParisTech
Apr, 2009 - Mar, 2012

Research Fellowship for Young Scientists (DC1), Ito and Yokoyama Laboratory, Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo

Education

Apr, 2009 - Sep, 2011

Doctral Course, Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo
Apr, 2007 - Mar, 2009

Master Course, Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo
Apr, 2005 - Mar, 2007

Department of Applied Physics, Faculty of Engineering, The University of Tokyo
Apr, 2003 - Mar, 2005

Natural Sciences I, College of Arts and Sciences, The University of Tokyo

Committee Memberships

Jun, 2017 - Present

新世代エラストマー技術研究分科会世話人, 日本ゴム協会
May, 2015 - Mar, 2021

関東高分子若手研究会世話人（2018年世話人代表）, 高分子学会

Awards

Papers

Mechanical properties of composite materials with low-covered polyrotaxane and plasma-surface-modified hexagonal boron nitride

Kenichi Inoue, Naoto Takagi, Shota Ando, Koichi Mayumi, Hitoshi Muneoka, Yoshiki Shimizu, Tsuyohito Ito, Kohzo Ito, Kazuo Terashima

Chemical Physics, 586 112377-112377, Oct, 2024
Hierarchical Structure of Soft Materials Studied at Small-Angle Neutron Scattering Instrument, SANS-U

Koichi Mayumi, Lester Geonzon, Kei Hashimoto, Tatsuro Oda

Journal of the Physical Society of Japan, 93(9), Sep 15, 2024
Effects of Heterogeneous Mixing of Imidazolium-Based Ionic Liquids with Alcohols on Complex Formation of Ni(II) Ion

Toshiyuki Takamuku, Akira Ogawa, Sou Tsutsui, Koichiro Sadakane, Hiroki Iwase, Koichi Mayumi, Kazuhiko Ozutsumi

The Journal of Physical Chemistry B, 128(35) 8567-8577, Aug 27, 2024
Understanding the rheological properties from linear to nonlinear regimes and spatiotemporal structure of mixed kappa and reduced molecular weight lambda carrageenan gels

Lester C. Geonzon, Takato Enoki, Sanjida Humayun, Rando Tuvikene, Shingo Matsukawa, Koichi Mayumi

Food Hydrocolloids, 150 109752-109752, May, 2024
Strain-Induced Crystallization in Tetra-Branched Poly(ethylene glycol) Hydrogels with a Common Network Structure

Kei Hashimoto, Takato Enoki, Chang Liu, Xiang Li, Takamasa Sakai, Koichi Mayumi

Macromolecules, 57(4) 1461-1468, Feb 12, 2024
Strain-induced crystallization and phase separation used for fabricating a tough and stiff slide-ring solid polymer electrolyte

Kei Hashimoto, Toru Shiwaku, Hiroyuki Aoki, Hideaki Yokoyama, Koichi Mayumi, Kohzo Ito

Science Advances, 9(47), Nov 24, 2023
Elaborating Spatiotemporal Hierarchical Structure of Carrageenan Gels and Their Mixtures during Sol–Gel Transition

Lester C. Geonzon, Kei Hashimoto, Tatsuro Oda, Shingo Matsukawa, Koichi Mayumi

Macromolecules, Oct 20, 2023
Phantom-Chain Simulations for the Effect of Node Functionality on the Fracture of Star-Polymer Networks

Yuichi Masubuchi, Yuya Doi, Takato Ishida, Naoyuki Sakumichi, Takamasa Sakai, Koichi Mayumi, Kotaro Satoh, Takashi Uneyama

Macromolecules, Sep 18, 2023
Mechanochromic luminescence of phase-separated hydrogels that contain cyclophane mechanophores

Shohei Shimizu, Hiroaki Yoshida, Koichi Mayumi, Hiroharu Ajiro, Yoshimitsu Sagara

Materials Chemistry Frontiers, 7(18) 4073-4079, Jun 22, 2023
Heterogeneities at the Onset of Reaction Acceleration during Bulk Polymerization of Methyl Methacrylate Investigated by Small-Angle Neutron Scattering

Yasuhito Suzuki, Yuya Doi, Ryutaro Mishima, Koichi Mayumi, Akikazu Matsumoto

MACROMOLECULES, 56(10) 3731-3738, May, 2023
Fabrication of Polyelectrolyte Sheets of Unimolecular Thickness via MOF-Templated Polymerization

Ami Nishijima, Yuki Hayashi, Koichi Mayumi, Nobuhiko Hosono, Takashi Uemura

Macromolecules, Apr 14, 2023
Phantom Chain Simulations for the Fracture of Energy-Minimized Tetra- and Tri-Branched Networks

Yuichi Masubuchi, Yuya Doi, Takato Ishida, Naoyuki Sakumichi, Takamasa Sakai, Koichi Mayumi, Takashi Uneyama

MACROMOLECULES, 56(5) 2217-2223, Feb, 2023
Quasi-elastic neutron scattering study on dynamics of polymer gels with controlled inhomogeneity under uniaxial deformation.

Kosuke Aomura, Yusuke Yasuda, Takeshi Yamada, Takamasa Sakai, Koichi Mayumi

Soft matter, 19(1) 147-152, Dec 21, 2022
A neuromechanical model for Drosophila larval crawling based on physical measurements.

Xiyang Sun, Yingtao Liu, Chang Liu, Koichi Mayumi, Kohzo Ito, Akinao Nose, Hiroshi Kohsaka

BMC biology, 20(1) 130-130, Jun 15, 2022
Tri-branched gels: Rubbery materials with the lowest branching factor approach the ideal elastic limit

Takeshi Fujiyabu, Naoyuki Sakumichi, Takuya Katashima, Chang Liu, Koichi Mayumi, Ung-il Chung, Takamasa Sakai

Science Advances, 8(14), Apr 8, 2022
Fracture Behavior of Polyrotaxane-Toughened Poly(Methyl Methacrylate).

Glendimar Molero, Cong Liu, Zewen Zhu, Qihui Chen, Suzanne R Peterson, Pavan V Kolluru, Hung-Jue Sue, Shuntaro Uenuma, Koichi Mayumi, Kohzo Ito

Langmuir : the ACS journal of surfaces and colloids, 38(7) 2335-2345, Feb 22, 2022
High-yield one-pot synthesis of polyrotaxanes with tunable well-defined threading ratios over a wide range.

Takako Noritomi, Lan Jiang, Hideaki Yokoyama, Koichi Mayumi, Kohzo Ito

RSC advances, 12(7) 3796-3800, Jan 28, 2022
Effect of movable crosslinking points on mechanical properties in composite materials of large amount of plasma-surface-modified boron nitride and slide-ring elastomer

Taku Goto, Yuta Hidaka, Lan Jiang, Rina Maeda, Koichi Mayumi, Tsuyohito Ito, Yoshiki Shimizu, Kohzo Ito, Yukiya Hakuta, Kazuo Terashima

COMPOSITES SCIENCE AND TECHNOLOGY, 216, Nov, 2021
Fabrication of flexible porous slide-ring polymer/carbon nanofiber composite elastomer by simultaneous freeze-casting and cross-linking reaction with dimethyl sulfoxide

Taku Goto, Noritaka Sakakibara, Kenichi Inoue, Koichi Mayumi, Yoshiki Shimizu, Tsuyohito Ito, Kohzo Ito, Yukiya Hakuta, Kazuo Terashima

Composites Science and Technology, 215, Oct 20, 2021
Fabrication of polyrotaxane and graphene nanoplate composites with high thermal conductivities

Masaki Iida, Taku Goto, Koichi Mayumi, Rina Maeda, Kazuto Hatakeyama, Tsuyohito Ito, Yoshiki Shimizu, Kohzo Ito, Yukiya Hakuta, Kazuo Terashima

POLYMER COMPOSITES, Aug, 2021

Misc.

Mechanical properties of slide-ring materials for dielectric elastomer actuators

K. Mayumi, C. Liu, Takanori Nakai, Makoto Ishida, Hiromitsu Takeuchi, Katsunari Inoue, Kenji Urayama, Hideaki Yokoyama, Kohzo Ito

Proceedings of SPIE - The International Society for Optical Engineering, 10966, 2019 Peer-reviewed
強度向上のためポリロタキサンを複合したPEDOTフィルムの作製と電気物性

岡田萌, 兼橋真二, 眞弓皓一, 下村武史, 伊藤耕三

繊維学会予稿集, 73(2) 17, Nov 1, 2018
マグネシウムイオン含有電解液膨潤スライドリングゲルのイオン伝導率測定

西野遥花, 兼橋真二, 眞弓皓一, 富永洋一, 下村武史, 伊藤耕三

高分子学会予稿集(CD-ROM), 66(2) ROMBUNNO.2Pc079, Sep 6, 2017
二次電池用電解液膨潤スライドリングゲルのイオン伝導率測定

西野遥花, 杉原直樹, 兼橋真二, 眞弓皓一, 富永洋一, 下村武史, 伊藤耕三

高分子学会予稿集(CD-ROM), 65(2) ROMBUNNO.3Pd060, Aug 24, 2016
アゾベンゼン側鎖を持つ環動性液晶ゲルの力学特性

林拓矢, 木戸脇匡俊, 伊藤耕三, 真弓皓一, 松澤洋子, 秋山陽久

高分子学会予稿集(CD-ROM), 63(2) ROMBUNNO.3PC037, Sep 3, 2014
アゾベンゼン骨格を持つ環動性液晶ゲルと非環動性ゲルの力学特性

林拓矢, 木戸脇匡俊, 伊藤耕三, 真弓皓一, 松澤洋子, 秋山陽久

日本液晶学会討論会講演予稿集(CD-ROM), 2014 ROMBUNNO.3B07, 2014
二軸伸長特性からみた環動ゲルの大変形挙動

近藤佑樹, 瀧川敏算, 浦山健治, 木戸脇匡俊, 眞弓皓一, 伊藤耕三

エラストマー討論会講演要旨集, 25th 141-142, Dec 10, 2013
二軸伸長測定による環動ゲルの大変形挙動の解析

近藤佑樹, 瀧川敏算, 浦山健治, 木戸脇匡俊, 眞弓皓一, 伊藤耕三

レオロジー討論会講演要旨集, 61st 180-181, Sep 25, 2013
Novel Entropic Elasticity of Topological Network Formed by Ring and String

MAYUMI Koichi, ITO Kohzo

68(3) 158-161, Mar 5, 2013
平衡膨潤状態の環動ゲルの二軸伸長挙動

近藤佑樹, 浦山健治, 瀧川敏算, 眞弓皓一, 木戸脇匡俊, 伊藤耕三

レオロジー討論会講演要旨集, 60th 183-184, 2012
分子ネックレスおよび可動架橋点高分子ゲルの構造とダイナミクス(<特集>ゲル研究の新展開)

眞弓皓一, 伊藤耕三

物性研究, 93(5) 546-550, 2010
28pVB-7 Nanoscale dynamics and structure of polyrotaxane by means of neutron scattering

Endo Hitoshi, Mayumi Koichi, Nagao Michihiro, Shibayama Mitsuhiro, Ito Kozo, Pipich Vitaliy, Holderer Olaf, Monkenbusch Michael, Richter Dieter

Meeting abstracts of the Physical Society of Japan, 64(1) 371-371, Mar 3, 2009
20pWB-10 Fine structural analysis on polyrotaxane by means of contrast variation small-angle neutron scattering

Endo Hitoshi, Mayumi Koichi, Osaka Noboru, Ito Kohzo, Shibayama Mitsuhiro

Meeting abstracts of the Physical Society of Japan, 63(2) 300-300, Aug 25, 2008

Research Projects

強相関ソフトマターの時空間階層構造解析

戦略的な研究開発の推進創発的研究支援事業, 科学技術振興機構, 2022 - 2028

眞弓皓一
Formation of cohelical structure in mixed gelatin gels and its effect on physical properties on food

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2023 - Mar, 2026
ゲルのロバスト強靱化機構の解明と人工腱・靱帯の開発

CREST 「革新的力学機能材料の創出に向けたナノスケール動的挙動と力学特性機構の解明」, 国立研究開発法人科学技術振興機構（JST）, Oct, 2019 - Mar, 2025

酒井崇匡
分子ダイナミクス計測による架橋高分子材料の強靭化メカニズム解明

科学研究費助成事業基盤研究(C), 基盤研究(C), 日本学術振興会, Apr, 2020 - Mar, 2023

眞弓皓一, 藤本和士
自己組織化ナノシートの構造制御と新規物性研究課題

科学研究費補助金基盤研究（A）, 日本学術振興会, Apr, 2019 - Mar, 2022

伊藤耕三
環動高分子材料の大変形・破壊メカニズムの解明研究課題

科学研究費補助金若手研究（B）, 日本学術振興会, Apr, 2015 - Mar, 2018

眞弓皓一
環動分子構造を利用した物質輸送膜システムの創成

科学研究費補助金基盤研究（S）, 日本学術振興会, Apr, 2014 - Mar, 2016

伊藤耕三
分子ネックレスのスライディング挙動と環境材料の動的力学物性の解明

科学研究費補助金特別研究員奨励費, 特別研究員奨励費, 日本学術振興会, Apr, 2009 - Mar, 2012

眞弓皓一

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