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Investigation of gel's mechanical properties and their spatial inhomogeneity

Research Project

Project/Area Number 19K15628
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 35020:Polymer materials-related
Research InstitutionHokkaido University (2021)
The University of Tokyo (2019-2020)

Principal Investigator

Li Xiang  北海道大学, 先端生命科学研究院, 准教授 (30759840)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsゲル / 小角散乱 / 構造欠陥 / 小角X線散乱 / 光散乱 / ソフトウェア開発 / 装置開発 / 大変形 / 均一ゲル / 伸長試験 / 小角散乱測定 / 構造評価 / 高分子 / 不均一性 / 動的光散乱 / 構造 / 力学物性
Outline of Research at the Start

ゲルやエラストマーなどの架橋高分子は医療材料から車のタイヤまで幅広い分野で利用されている。しかし、これらの架橋高分子の網目には様々な不均一性(空間不均一性・トポロジカル不均一性・結合不均一性)が内包されており、力学物性に多大な影響を与えている。本研究では申請者が新規開発した空間不均一性が存在しないゲルを用いて、空間不均一性が架橋高分子の力学応答に与える影響を明らかにする。

Outline of Final Research Achievements

Based on a gel with extremely low spatial inhomogeneity that has been successfully synthesized in recent years, we intentionally introduced spatial inhomogeneity without changing the basic unit, cross-linking agent, etc. We evaluated the effect of spatial defects on the mechanical properties of the gel. Small-angle X-ray scattering experiments revealed that the structural defects were successfully introduced as intended. The type, size, and volume fraction of the defects in the gel were also determined in detail. Furthermore, a method of small-angle X-ray scattering while elongating the gel has been established, which enables a more quantitative analysis of the scattering pattern, which was previously unclear.

Academic Significance and Societal Importance of the Research Achievements

研究室や工業的に合成されるゲルには不可避に構造欠陥が多く含まれる。多くの場合において、これらの欠陥は意図したものではなく、制御することも極めて困難である。本研究では、極めて均一な網目構造を持つゲルをベースに用い、合成手法をほとんど変えない状態で、意図的に空隙とナノ凝集を導入することに成功した。さらに、それらに基づく散乱プロファイルも明らかにできた。これらの結果は一般的なゲルの構造を解析する上で重要な知見を与える。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (30 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (15 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 15 results,  Open Access: 4 results) Presentation (10 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Remarks (3 results) Patent(Industrial Property Rights) (1 results) (of which Overseas: 1 results)

  • [Int'l Joint Research] Australian Centre for Neutron Scattering(オーストラリア)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Structure and Dynamics of Critical Polymer Clusters Formed with Tetra-Armed Star-Polymers2022

    • Author(s)
      Li Xiang
    • Journal Title

      Nihon Reoroji Gakkaishi

      Volume: 50 Issue: 1 Pages: 113-117

    • DOI

      10.1678/rheology.50.113

    • ISSN
      0387-1533, 2186-4586
    • Year and Date
      2022-02-15
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Star-Polymer-DNA Gels Showing Highly Predictable and Tunable Mechanical Responses2022

    • Author(s)
      Ohira Masashi、Katashima Takuya、Naito Mitsuru、Aoki Daisuke、Yoshikawa Yusuke、Iwase Hiroki、Takata Shin‐ichi、Miyata Kanjiro、Chung Ung‐il、Sakai Takamasa、Shibayama Mitsuhiro、Li Xiang
    • Journal Title

      Advanced Materials

      Volume: 34 Issue: 13 Pages: 2108818-2108818

    • DOI

      10.1002/adma.202108818

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nanoscale Structures of Poly(oligo ethylene glycol methyl ether methacrylate) Hydrogels Revealed by Small-Angle Neutron Scattering2022

    • Author(s)
      Kureha Takuma、Ohira Masashi、Takahashi Yuki、Li Xiang、Gilbert Elliot P.、Shibayama Mitsuhiro
    • Journal Title

      Macromolecules

      Volume: 55 Issue: 5 Pages: 1844-1854

    • DOI

      10.1021/acs.macromol.1c02259

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Construction of a nano-phase-separated structure on a hydrogel surface2022

    • Author(s)
      Nishimoto Taihei、Enomoto Takafumi、Lin Chia-Hsuan、Wu Jhih-Guang、Gupit Caidric Indaya、Li Xiang、Luo Shyh-Chyang、Akimoto Aya Mizutani、Yoshida Ryo
    • Journal Title

      Soft Matter

      Volume: 18 Issue: 4 Pages: 722-725

    • DOI

      10.1039/d1sm01659h

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Neutralization and Salt Effect on the Structure and Mechanical Properties of Polyacrylic Acid Gels under Equivolume Conditions2021

    • Author(s)
      Tsuji Yui、Shibayama Mitsuhiro、Li Xiang
    • Journal Title

      Gels

      Volume: 7 Issue: 2 Pages: 69-69

    • DOI

      10.3390/gels7020069

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Microphase separation of stimuli-responsive interpenetrating network microgels investigated by scattering methods2021

    • Author(s)
      Kozhunova Elena Yu.、Rudyak Vladimir Yu.、Li Xiang、Shibayama Mitsuhiro、Peters Georgy S.、Vyshivannaya Oxana V.、Nasimova Irina R.、Chertovich Alexander V.
    • Journal Title

      Journal of Colloid and Interface Science

      Volume: 597 Pages: 297-305

    • DOI

      10.1016/j.jcis.2021.03.178

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Molecular crystallization directed by polymer size and overlap under dilute and crowded macromolecular conditions2021

    • Author(s)
      Hata Yuuki、Li Xiang、Chung Ung-il、Sakai Takamasa
    • Journal Title

      Polymer Journal

      Volume: 53 Issue: 5 Pages: 633-642

    • DOI

      10.1038/s41428-021-00461-7

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of Nonlinear Elasticity on the Swelling Behaviors of Highly Swollen Polyelectrolyte Gels2021

    • Author(s)
      Tang Jian、Katashima Takuya、Li Xiang、Mitsukami Yoshiro、Yokoyama Yuki、Chung Ung-il、Shibayama Mitsuhiro、Sakai Takamasa
    • Journal Title

      Gels

      Volume: 7 Issue: 1 Pages: 25-25

    • DOI

      10.3390/gels7010025

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Topology Transformation toward Cyclic, Figure-Eight-Shaped, and Cross-Linked Polymers Based on the Dynamic Behavior of a Bis(hindered amino)disulfide Linker2021

    • Author(s)
      Yokochi Hirogi、Ohira Masashi、Oka Minami、Honda Satoshi、Li Xiang、Aoki Daisuke、Otsuka Hideyuki
    • Journal Title

      Macromolecules

      Volume: 54 Issue: 21 Pages: 9992-10000

    • DOI

      10.1021/acs.macromol.1c01437

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A benchmark for gel structures: bond percolation enables the fabrication of extremely homogeneous gels2021

    • Author(s)
      Li Xiang
    • Journal Title

      Polymer Journal

      Volume: 53 Issue: 7 Pages: 765-777

    • DOI

      10.1038/s41428-021-00479-x

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Selective Doping of Positive and Negative Spatial Defects into Polymer Gels by Tuning the Pregel Packing Conditions of Star Polymers2020

    • Author(s)
      Tsuji Yui、Nakagawa Shintaro、Gupit Caidric Indaya、Ohira Masashi、Shibayama Mitsuhiro、Li Xiang
    • Journal Title

      Macromolecules

      Volume: 53 Issue: 17 Pages: 7537-7545

    • DOI

      10.1021/acs.macromol.0c01208

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Characterization of N-phenylmaleimide-terminated poly(ethylene glycol)s and their application to a tetra-arm poly(ethylene glycol) gel2020

    • Author(s)
      Takashima Rikito、Ohira Masashi、Yokochi Hirogi、Aoki Daisuke、Li Xiang、Otsuka Hideyuki
    • Journal Title

      Soft Matter

      Volume: 16 Issue: 48 Pages: 10869-10875

    • DOI

      10.1039/d0sm01658f

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Quantitative Structure Analysis of a Near-Ideal Polymer Network with Deuterium Label by Small-Angle Neutron Scattering2020

    • Author(s)
      Ohira Masashi、Tsuji Yui、Watanabe Nobuyuki、Morishima Ken、Gilbert Elliot P.、Li Xiang、Shibayama Mitsuhiro
    • Journal Title

      Macromolecules

      Volume: 53 Issue: 10 Pages: 4047-4054

    • DOI

      10.1021/acs.macromol.9b02695

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Dynamics of Critical Clusters Synthesized by End-Coupling of Four-Armed Poly(ethylene glycol)s2019

    • Author(s)
      Li Xiang、Noritomi Takako、Sakai Takamasa、Gilbert Elliot P.、Shibayama Mitsuhiro
    • Journal Title

      Macromolecules

      Volume: 52 Issue: 14 Pages: 5086-5094

    • DOI

      10.1021/acs.macromol.9b01066

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Polymer gel with a flexible and highly ordered three-dimensional network synthesized via bond percolation2019

    • Author(s)
      Li X.、Nakagawa S.、Tsuji Y.、Watanabe N.、Shibayama M.
    • Journal Title

      Science Advances

      Volume: 5 Issue: 12

    • DOI

      10.1126/sciadv.aax8647

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Relationship between viscoelastic properties and molecular behavior of physical gels with ideal network cross-linked by duplex DNA2022

    • Author(s)
      大平 征史、Li Xiang
    • Organizer
      日本化学会春季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Nanostructures of polymer gels; towards highly homogeneous gels, International webinar on gels and networks2021

    • Author(s)
      Li Xiang
    • Organizer
      International webinar on gels and networks
    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 理想的な網目構造と予測可能なレオロジー特性を有する DNA ゲルの創製2021

    • Author(s)
      大平 征史、Li Xiang
    • Organizer
      高分子年次大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 架橋前の高分子の空間充填状態がゲルの構造とダイナミックスに与える影響2021

    • Author(s)
      Li Xiang
    • Organizer
      高分子討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 理想的な網目構造と制御可能なレオロジー特性を有するDNAゲルの創製2021

    • Author(s)
      大平 征史、Li Xiang
    • Organizer
      レオロジー討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 光・X 線散乱による高均一ゲルの構造・ダイナミックスの解析2020

    • Author(s)
      Li Xiang, 中川慎太郎、辻 優衣、柴山 充弘
    • Organizer
      高分子討論会
    • Related Report
      2020 Research-status Report
  • [Presentation] Bond-percolation による空間不均一性が全く存在ない高分子ゲルの創造2020

    • Author(s)
      Li Xiang, 中川慎太郎、辻優衣、柴山充弘
    • Organizer
      高分子ゲル研究討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] Polymer gel with a flexible and highly ordered three-dimensional network synthesized via bond-percolation2019

    • Author(s)
      Li Xiang
    • Organizer
      2nd GLowing Polymer Symposium in KANTO
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Structure Analysis of ideal Physical Gel Crosslinked with Double-Helix of DNA by Small Angle Neutron Scattering2019

    • Author(s)
      Xiang Li, Masashi Ohira, Mitsuru Naito, Mitsuhiro Shibayama
    • Organizer
      32th International Symposium on Polymer Analysis and Characterization
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Structure analysis of ideal physical gel crosslinked with double-helix of DNA by small-angle neutron scattering2019

    • Author(s)
      Xiang Li
    • Organizer
      Gordon Research Conference Neutron Scattering
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Remarks] 超高均一で究極に透明なゲルを創出 〜ゲルの状態を再定義〜

    • URL

      https://www.issp.u-tokyo.ac.jp/maincontents/news2.html?pid=9283

    • Related Report
      2019 Research-status Report
  • [Remarks] Researchers add order to polymer gels

    • URL

      https://www.u-tokyo.ac.jp/focus/en/press/z0508_00085.html

    • Related Report
      2019 Research-status Report
  • [Remarks] 究極に透明なゲルを合成・ゲルの状態を再定義

    • URL

      https://www.shibayamalab.issp.u-tokyo.ac.jp/research

    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] Highly homogeneous gels and their preparation method2019

    • Inventor(s)
      Li Xiang, 中川慎太郎、柴山充弘
    • Industrial Property Rights Holder
      Li Xiang, 中川慎太郎、柴山充弘
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2019 Research-status Report
    • Overseas

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

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