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Quantitative analysis of surface strain of bent film: Fabrication of high performance flexible substrate by molecular orientation design

Research Project

Project/Area Number 18K14297
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 35030:Organic functional materials-related
Research InstitutionTokyo Institute of Technology

Principal Investigator

Akamatsu Norihisa  東京工業大学, 科学技術創成研究院, 助教 (50806734)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsひずみ / 分子配向 / 湾曲
Outline of Final Research Achievements

As the advantage of flexibility of soft materials, next-generation electronic devices such as flexible devices, wearable devices, and soft robots have been reported. However, surface strain induced by bending causes the performance degradation of these devices. To circumvent the bending strain, many researchers developed high-stretchable materials or explored structural design in the devices, but further effort is required. As the new approach to enhance performance of devices, the strain control by design of substrate has been proposed. Liquid-crystalline polymer materials are known to exhibit unique stimuli responsive behavior because of molecular alignment. Thus, it is expected that the design of molecular alignment direction, especially three-dimensional alignment, also enables to control bending strain. In this study, the author employed liquid-crystalline polymer films with controlled molecular alignment and evaluated their surface strain by bending analysis.

Academic Significance and Societal Importance of the Research Achievements

本研究では,分子配向を有する液晶高分子フィルムが,湾曲方向によって異なる表面ひずみを示すことを明らかにした。湾曲に伴う表面ひずみ解析により,一軸に配向したフィルムでは,分子配向方向に依らず外面が膨張し,内面が収縮する対称な表面ひずみ挙動を示した。一方,面内で液晶分子がねじれたツイストネマチック配向フィルムでは,分子配向によって外面と内面が非対称なひずみ挙動を示した。分子配向を三次元的に設計することで湾曲に伴う表面ひずみを制御できたことから,高性能でありながら低伸縮性であった電子部材を容易に積層することができる。今後,湾曲してもひずみが軽減されたフレキシブルデバイスの基板として大いに応用できる。

Report

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

    (48 results)

All 2020 2019 2018 Other

All Journal Article (9 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 9 results,  Open Access: 3 results) Presentation (36 results) (of which Int'l Joint Research: 8 results,  Invited: 4 results) Book (2 results) Remarks (1 results)

  • [Journal Article] Out-of-plane Strain Measurement of a Silicone Elastomer by means of a Cholesteric Liquid Crystal Sensor2020

    • Author(s)
      Kishino Masayuki、Akamatsu Norihisa、Taguchi Ryo、Hisano Kyohei,、Tsutsumi Osamu、Shishido Atsushi
    • Journal Title

      J. Photopolym. Sci. Technol.

      Volume: -

    • NAID

      130007867529

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nonlinear Molecular Reorientation of Polymer-Stabilized Dye-Doped Liquid Crystals by Depolarized Laser Beam2020

    • Author(s)
      Matsumoto Kohsuke、Usui Koji、Akamatsu Norihisa、Shishido Atsushi
    • Journal Title

      J. Photopolym. Sci. Technol.

      Volume: -

    • NAID

      130007867527

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of the Concentration Gradient on Molecular Alignment by Scanning Wave Photopolymerization2020

    • Author(s)
      Kobayashi Yoshiaki、Taguchi Ryo、Akamatsu Norihisa、Shishido Atsushi
    • Journal Title

      J. Photopolym. Sci. Technol.

      Volume: -

    • NAID

      130007867564

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Experimental and theoretical analyses of curvature and surface strain in bent polymer films2020

    • Author(s)
      Kuwahara Kohei、Taguchi Ryo、Kishino Masayuki、Akamatsu Norihisa、Tokumitsu Kayoko、Shishido Atsushi
    • Journal Title

      Applied Physics Express

      Volume: 13 Issue: 5 Pages: 056502-056502

    • DOI

      10.35848/1882-0786/ab8346

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Simultaneous formation behaviour of surface structures and molecular alignment by patterned photopolymerisation2019

    • Author(s)
      S. Hashimoto, M. Aizawa, N. Akamatsu, T. Sasaki, A. Shishido
    • Journal Title

      Liq. Cryst.

      Volume: 46 Issue: 13-14 Pages: 1995-2002

    • DOI

      10.1080/02678292.2019.1610980

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of surface treatment on molecular alignment behavior by scanning wave photopolymerization2019

    • Author(s)
      Ishizu Masaki、Aizawa Miho、Akamatsu Norihisa、Hisano Kyohei、Fujikawa Shigenori、Barrett Christopher J、Shishido Atsushi
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 4 Pages: 041004-041004

    • DOI

      10.7567/1882-0786/ab040d

    • NAID

      210000135634

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Direct fabrication of a q-plate array by scanning wave photopolymerization2019

    • Author(s)
      Aizawa Miho、Ota Megumi、Hisano Kyohei、Akamatsu Norihisa、Sasaki Takeo、Barrett Christopher J.、Shishido Atsushi
    • Journal Title

      Journal of the Optical Society of America B

      Volume: 36 Issue: 5 Pages: D47-D47

    • DOI

      10.1364/josab.36.000d47

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Single-step creation of polarization gratings by scanning wave photopolymerization with unpolarized light2019

    • Author(s)
      Hisano Kyohei、Ota Megumi、Aizawa Miho、Akamatsu Norihisa、Barrett Christopher J.、Shishido Atsushi
    • Journal Title

      Journal of the Optical Society of America B

      Volume: 36 Issue: 5 Pages: D112-D112

    • DOI

      10.1364/josab.36.00d112

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effect of Hardness on Surface Strain of PDMS Films Detected by a Surface Labeled Grating Method2018

    • Author(s)
      Akamatsu Norihisa、Fukuhara Motoyuki、Fujikawa Shigenori、Shishido Atsushi
    • Journal Title

      Journal of Photopolymer Science and Technology

      Volume: 31 Issue: 4 Pages: 523-526

    • DOI

      10.2494/photopolymer.31.523

    • NAID

      130007481547

    • ISSN
      0914-9244, 1349-6336
    • Year and Date
      2018-06-25
    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] 選択反射を示すコレステリック液晶を利用した湾曲シリコーンエラストマー内部の面外ひずみ解析2020

    • Author(s)
      岸野真之,久野恭平,堤治,赤松範久,宍戸厚
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] フレキシブルエレクトロニクスに資する高分子フィルム基板の湾曲表面ひずみの制御2020

    • Author(s)
      田口諒,桑原恒平,赤松範久,宍戸厚
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 高分子フィルムの湾曲ひずみにおける分子配向方向依存性2020

    • Author(s)
      金原優里奈,桑原恒平,田口諒,赤松範久,宍戸厚
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 光の回折を利用した高分子フィルムの湾曲ひずみ解析と理論による検証2019

    • Author(s)
      桑原恒平,徳光香代子,田口諒,赤松範久,藤川茂紀,宍戸厚
    • Organizer
      プラスチック成形加工学会第30回年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] コレステリック液晶フィルムを利用した湾曲シリコーンエラストマーの面外方向ひずみ解析2019

    • Author(s)
      岸野真之,久野恭平,堤治,赤松範久,宍戸厚
    • Organizer
      プラスチック成形加工学会第30回年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Inner Strain Analysis in Bending Silicone Elastomer by Cholesteric Liquid Crystal Sensor2019

    • Author(s)
      岸野真之,久野恭平,堤治,赤松範久,宍戸厚
    • Organizer
      The 19th International Meeting on Information Display
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 分子配向を制御した液晶高分子フィルムの作製と湾曲挙動解析2019

    • Author(s)
      藤澤愛樹,赤松範久,宍戸厚
    • Organizer
      2019年日本液晶学会討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 選択反射を示すコレステリック液晶センサーを導入したシリコーンエラストマーのひずみ挙動解析2019

    • Author(s)
      岸野真之,久野恭平,堤治,赤松範久,宍戸厚
    • Organizer
      2019年日本液晶学会討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 三次元分子配向を有する液晶高分子フィルムの作製と変形に伴う力学挙動解析2019

    • Author(s)
      藤澤愛樹,赤松範久,宍戸厚
    • Organizer
      第80回応物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 機能性高分子フィルムの三次元変形に伴う力学挙動解析2019

    • Author(s)
      赤松範久,宍戸厚
    • Organizer
      第68回高分子討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 湾曲ひずみを抑制した積層高分子フィルムによるクラック発生防止2019

    • Author(s)
      田口諒,桑原恒平,赤松範久,宍戸厚
    • Organizer
      第68回高分子討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 分子配向を制御した液晶高分子フィルムの微視的湾曲挙動解析2019

    • Author(s)
      藤澤愛樹,赤松範久,宍戸厚
    • Organizer
      第68回高分子討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 力学特性が異なる高分子フィルムの湾曲ひずみ挙動解析2019

    • Author(s)
      桑原恒平,田口諒,赤松範久,宍戸厚
    • Organizer
      第68回高分子討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] コレステリック液晶のらせんピッチ変化を利用した面外ひずみの定量可視化2019

    • Author(s)
      岸野真之,久野恭平,堤治,赤松範久,宍戸厚
    • Organizer
      第68回高分子討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 一軸延伸ポリエチレンテレフタラートフィルムの湾曲定量解析2019

    • Author(s)
      金原優里奈,桑原恒平,田口諒,赤松範久,宍戸厚
    • Organizer
      第9回CSJ化学フェスタ2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 液晶高分子フィルムの湾曲挙動における分子配向効果2019

    • Author(s)
      藤澤愛樹,赤松範久,宍戸厚
    • Organizer
      第29回日本MRS年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 高分子フィルム基板の湾曲挙動解析~曲がるデバイス創製を目指して~2019

    • Author(s)
      赤松範久
    • Organizer
      東京学芸大学教育学部自然科学系分子化学分野学術講演会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Out-of-plane strain analysis of deformed soft materials by selective reflection of cholesteric liquid crystals2019

    • Author(s)
      岸野真之,久野恭平,堤治,赤松範久,宍戸厚
    • Organizer
      The 4th Asian Conference on Liquid Crystals (ACLC 2019)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] フレキシブルな高分子フィルムの力学挙動解析2019

    • Author(s)
      赤松範久
    • Organizer
      平成30年度東北地区先端高分子セミナー
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] コレステリック液晶フィルムを利用した湾曲ソフトマテリアルのひずみ可視化2019

    • Author(s)
      岸野真之,久野恭平,堤治,赤松範久,宍戸厚
    • Organizer
      日本化学会第99春季年会
    • Related Report
      2018 Research-status Report
  • [Presentation] 延伸高分子フィルムの湾曲形状解析2019

    • Author(s)
      桑原恒平,徳光香代子,田口諒,赤松範久,藤川茂紀,宍戸厚
    • Organizer
      日本化学会第99春季年会
    • Related Report
      2018 Research-status Report
  • [Presentation] 機能性フレキシブルフィルムの湾曲に伴うひずみ解析2018

    • Author(s)
      赤松範久,宍戸厚
    • Organizer
      有機エレクトロニクス材料研究会 第228回研究会「フレキシブルアクチュエータ」
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] コレステリック液晶フィルムの三次元的なひずみによる反射光制御2018

    • Author(s)
      岸野真之,臼井鴻志,久野恭平,赤松範久,宍戸厚,堤治
    • Organizer
      第22回液晶化学研究会シンポジウム
    • Related Report
      2018 Research-status Report
  • [Presentation] Development of Strain Analysis Method for Flexible Polymer Substrates2018

    • Author(s)
      田口諒,徳光香代子,赤松範久,藤川茂紀,宍戸厚
    • Organizer
      3rd International Conference on Photoalignment and Photopattering in Soft Materials 2018 (PhoSM 2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Three-Dimensional Strain Analysis of Bending Flexible Polymer Films2018

    • Author(s)
      赤松範久,宍戸厚
    • Organizer
      The 35th International Conference of Photopolymer Science and Technology
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] コレステリック液晶の選択反射を利用したソフトマテリアルの湾曲挙動解析2018

    • Author(s)
      岸野真之,久野恭平,堤治,赤松範久,宍戸厚
    • Organizer
      2018年日本液晶学会討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] アスペクト比の異なる高分子フィルムの湾曲挙動解析と形状観察2018

    • Author(s)
      桑原恒平,徳光香代子,田口諒,赤松範久,藤川茂紀,宍戸厚
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 繰り返し湾曲過程における高分子フィルムのひずみ解析2018

    • Author(s)
      徳光香代子,田口諒,赤松範久,藤川茂紀,宍戸厚
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] コレステリック液晶の選択反射を利用した湾曲シリコーンエラストマーの面外方向変形解析2018

    • Author(s)
      岸野真之,久野恭平,堤治,赤松範久,宍戸厚
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] Microscopic strain analysis of largely bending polymer films by a surface-labeled grating method2018

    • Author(s)
      徳光香代子,田口諒,赤松範久,藤川茂紀,宍戸厚
    • Organizer
      2018 KJF International Conference on Organic Materials for Electronics and Photonics (KJF-ICOMEP 2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Development of bending strain analysis method for flexible polymer films2018

    • Author(s)
      田口諒,徳光香代子,赤松範久,藤川茂紀,宍戸厚
    • Organizer
      The 79th Okazaki Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] コレステリック液晶センサーによるソフトマテリアルの湾曲内部ひずみ解析2018

    • Author(s)
      岸野真之,久野恭平,堤治,赤松範久,宍戸厚
    • Organizer
      第8回CSJ化学フェスタ2018
    • Related Report
      2018 Research-status Report
  • [Presentation] 高分子フィルムの湾曲挙動における形状依存性評価2018

    • Author(s)
      桑原恒平,徳光香代子,田口諒,赤松範久,藤川茂紀,宍戸厚
    • Organizer
      第8回CSJ化学フェスタ2018
    • Related Report
      2018 Research-status Report
  • [Presentation] 柔軟な高分子フィルムの大湾曲に伴うひずみ挙動解析2018

    • Author(s)
      赤松範久,宍戸厚
    • Organizer
      第6回アライアンス若手研究交流会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Strain Analysis in Bent Silicone Elastomers by Selective Reflection of Cholesteric Liquid Crystals2018

    • Author(s)
      岸野真之,久野恭平,堤治,赤松範久,宍戸厚
    • Organizer
      The 9th International Forum on Chemistry of Functional Organic Chemicals (IFOC-9)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Novel Bending Surface Strain Sensing Method for Flexible Films2018

    • Author(s)
      田口諒,徳光香代子,赤松範久,藤川茂紀,宍戸厚
    • Organizer
      The 9th International Forum on Chemistry of Functional Organic Chemicals (IFOC-9)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Book] 次世代ディスプレイへの応用に向けた材料、プロセス技術の開発動向2020

    • Author(s)
      田口諒,赤松範久,宍戸厚
    • Total Pages
      559
    • Publisher
      技術情報協会
    • ISBN
      9784861047794
    • Related Report
      2019 Annual Research Report
  • [Book] 光機能性有機・高分子材料における新たな息吹2019

    • Author(s)
      田口諒,赤松範久,宍戸厚
    • Total Pages
      333
    • Publisher
      シーエムシー出版
    • ISBN
      9784781314143
    • Related Report
      2019 Annual Research Report
  • [Remarks] 宍戸・久保研究室

    • URL

      http://www.polymer.res.titech.ac.jp/

    • Related Report
      2019 Annual Research Report

URL: 

Published: 2018-04-23   Modified: 2021-02-19  

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