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Challenge to enhance the mechanical property of polymeric materials by introducing bio-inspired folding structure

Research Project

Project/Area Number 18K19105
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 35:Polymers, organic materials, and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Yoshie Naoko  東京大学, 生産技術研究所, 教授 (20224678)

Project Period (FY) 2018-06-29 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords高分子材料物性 / 生体模倣 / 強靭化 / 動的結合 / 架橋ポリマー / 分子内架橋 / 機械特性 / 筋肉
Outline of Final Research Achievements

Muscle proteins have intramolecular folding structure driven by transient hydrogen bonds. The folded structure is unfolded upon external stress, efficiently dissipating energy to avoid fracture of the molecule. Inspired by this mechanism in nature, we aimed to develop a general methodology for toughening of artificial polymeric materials based on intramolecular folding structure. We introduced strong hydrogen-bonding groups into a block copolymer-type thermoplastic elastomer to induce intramolecular crosslinking. The mechanical properties of the polymers with intramolecular folding structure were examined by uniaxial tensile tests, which revealed the enhancement effect of intramolecular folding on mechanical performance of crosslinked polymers. We expect that the concept of intramolecular folding developed here will serve as a basis for enhancing mechanical functionalities of various polymeric materials.

Academic Significance and Societal Importance of the Research Achievements

本研究により、分子内折りたたみ構造の導入が、高分子材料の新たな力学特性向上手段となり得ることを示す先駆的な知見が得られた。高分子の三次元網目からなる架橋高分子は産業上重要な材料であり、その力学的信頼性の向上は常に重要な課題である。今後、より多様な高分子種・結合種を用いた折りたたみ構造を実現・検証することで、優れた力学機能を有する材料の開発につながると期待される。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (3 results)

All 2021 2018

All Presentation (3 results)

  • [Presentation] 水素結合の集約による分子内折りたたみを有する熱可塑性エラストマーの力学特性2021

    • Author(s)
      兼村 夏姫, 中川 慎太郎, 吉江 尚子
    • Organizer
      第70回高分子学会年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 筋タンパクにヒントを得た局所的折りたたみ構造を有する熱可塑性エラストマーの合成および物性2018

    • Author(s)
      中川 慎太郎, 吉江 尚子
    • Organizer
      第67回高分子討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] 筋タンパク質にヒントを得た折りたたみ構造を有する熱可塑性エラストマーの創製2018

    • Author(s)
      中川 慎太郎, 吉江 尚子
    • Organizer
      平成30年度 繊維学会秋季研究発表会
    • Related Report
      2018 Research-status Report

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Published: 2018-07-25   Modified: 2022-01-27  

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