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Development of next-generation mechanoprobes that can contribute to elucidation of failure, fatigue, and degradation mechanisms in polymeric materials

Research Project

Project/Area Number 19K15623
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 35010:Polymer chemistry-related
Research InstitutionHiroshima University

Principal Investigator

Imato Keiichi  広島大学, 先進理工系科学研究科(工), 助教 (80777970)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords高分子化学 / メカノケミストリー / メカノクロミズム / メカノフォア / 分子マシン / 分子スイッチ / 電荷移動相互作用 / 応力検出 / メカノフルオロクロミズム / 高分子 / 光制御
Outline of Research at the Start

軽量で加工性に優れ、強度も向上した高分子材料は低炭素社会の実現に向け、特に自動車や航空機の燃料を削減する構造材料などで用途拡大と需要増加が期待される。しかし、歴史の浅い高分子材料の破壊・疲労・劣化現象の理解は乏しく、機構解明による耐久性・安全性・信頼性の向上は喫緊の課題である。本研究では、この機構解明に適した機能(①高感度認識・検出、②熱不可逆性、③光可逆性)を併せ持つ次世代のメカノプローブを開発する。

Outline of Final Research Achievements

In this study, we tried to develop mechanoprobes (MPs) with functions suitable for elucidation of failure, fatigue, and degradation mechanisms in polymeric materials, such as thermal irreversibility at room temperature, photoreversibility, and highly sensitive detection of force. Although the designed MPs could not be obtained, we successfully synthesized a molecular switch, which is a central part of the MPs and showed properties superior to existing molecular switches, including large structural changes, high switching ratio, and excellent thermal stability. The molecular switch was introduced into linear polymers, enabling them to photoreversibly convert their structures in solution and physical properties in bulk.

Academic Significance and Societal Importance of the Research Achievements

アゾベンゼンに代表される分子スイッチは、化学に限らず生物学や工学などの広範な分野で利用されている。本研究で開発した新たな分子スイッチはアゾベンゼンを凌駕する機能を示し、今後、様々な応用が期待されることから学術的意義は大きい。特にソフトアクチュエーターや光可逆性接着剤の実現により、近年注目を集めるソフトロボットやリサイクル分野での貢献が考えられ、社会的意義も十分にある。

Report

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

    (12 results)

All 2020 2019 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 3 results,  Invited: 4 results) Remarks (2 results)

  • [Journal Article] Fluorescent supramolecular mechanophores based on charge-transfer interactions2020

    • Author(s)
      Imato Keiichi、Yamanaka Ryota、Nakajima Hidekazu、Takeda Naoya
    • Journal Title

      Chemical Communications

      Volume: 56 Issue: 57 Pages: 7937-7940

    • DOI

      10.1039/d0cc03126g

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Self-healing polyurethane elastomers based on charge-transfer interactions for biomedical applications2020

    • Author(s)
      Imato Keiichi、Nakajima Hidekazu、Yamanaka Ryota、Takeda Naoya
    • Journal Title

      Polymer Journal

      Volume: 53 Issue: 2 Pages: 355-362

    • DOI

      10.1038/s41428-020-00432-4

    • NAID

      120007168961

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Phenazine-based photosensitizers for singlet oxygen generation2020

    • Author(s)
      Imato Keiichi、Ohira Kazuki、Yamaguchi Masakuni、Enoki Toshiaki、Ooyama Yousuke
    • Journal Title

      Materials Chemistry Frontiers

      Volume: 4 Issue: 2 Pages: 589-596

    • DOI

      10.1039/c9qm00685k

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Thermally stable and photoresponsive molecular machines for manipulating polymer structures and properties2020

    • Author(s)
      Keiichi Imato, Ayane Sasaki, Ayumu Yamane, Ichiro Imae, Yousuke Ooyama
    • Organizer
      The 14th International Symposium on Organic Reactions and the 44th Symposium on Organic Electron Transfer Chemistry
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 熱安定な光応答性分子マシンを有する高分子の合成と評価2020

    • Author(s)
      佐々木綾音, 今任景一, 今榮一郎, 大山陽介
    • Organizer
      第69回高分子学会年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 電荷移動相互作用に基づく力に応答する機能性高分子材料の開発2020

    • Author(s)
      今任景一
    • Organizer
      2020年日本化学会中国四国支部大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Force-Reporting and Self-Healing Materials Based on Charge-Transfer Interaction2019

    • Author(s)
      Keiichi Imato
    • Organizer
      2019 Hiroshima University-Pusan National University Joint Symposium on Sustainable Materials
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 高分子材料に生じる力を検出可能な蛍光色素間の電荷移動相互作用に基づくメカノプローブの開発2019

    • Author(s)
      今任景一, 山中凌大, 中島英和, 武田直也
    • Organizer
      2019年度 色材研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] Force-Reporting and Self-Healing Polymeric Materials Based on Charge-Transfer Interaction2019

    • Author(s)
      Keiichi Imato
    • Organizer
      The National Central University-Hiroshima University Joint Symposium 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 力や光に応答する機能性高分子材料の開発2019

    • Author(s)
      今任景一
    • Organizer
      2019年度 高分子・ハイブリッド材料研究センター(PHyM)若手フォーラム
    • Related Report
      2019 Research-status Report
    • Invited
  • [Remarks] 今任景一(Keiichi Imato)の個人ページ

    • URL

      https://kimato.info

    • Related Report
      2020 Annual Research Report 2019 Research-status Report
  • [Remarks] researchmap

    • URL

      https://researchmap.jp/keiichi_imato

    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2022-01-27  

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