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Synthesis of grafted polymer chains intiated from the free surface

Research Project

Project/Area Number 21K19000
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 InstitutionNagoya University

Principal Investigator

Seki Takahiro  名古屋大学, 工学研究科, 名誉教授 (40163084)

Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Keywords自由界面 / 光電子移動RAFT重合 / 液晶 / グラフト鎖 / RAFT重合 / 表面グラフト鎖 / 光開始重合
Outline of Research at the Start

固体基板表面からの開始するグラフト重合は高密度ブラシ鎖を形成させることができ、固有なコンフォメーションと配向から特徴的な機能が発現する。本研究は、固体基板表面からのグラフト重合ではなく、モノマー膜の空気側の自由界面から開始させる重合反応を提案し、新たな高分子合成のプラットフォームの構築に挑戦する。具体的には、酸素存在下でも重合が阻害されにくいイリジウム錯体の光電子移動剤を組み込んだ可逆的付加開裂連鎖移動(RAFT)重合系にて本提案を検証する。この重合系は光照射のオン/オフで重合が進行/停止が制御できるので、重合の進行と状態変化の各段階の状態を詳細に解析することができると期待される。

Outline of Final Research Achievements

Attaching the polymer chain to the substrate surface is frequently performed in the surface-initiated process from the substrate. Such surface-initiated graft polymerization can form dense brush chains, which leads to characteristic conformation and alignment nature. This approach is usually carried out from the surface of a solid substrate.
In the present research, a new polymerization process that performs the reaction starting from the free surface (on the air side of the monomer film) is proposed, aiming at proposing a platform for new polymer synthesis. We conducted research to verify this proposal using a reversible addition-fragmentation chain transfer(RAFT) polymerization system incorporating a photoelectron transfer agent of an iridium complex whose polymerization is not easily inhibited even in the presence of oxygen.

Academic Significance and Societal Importance of the Research Achievements

液晶分子の表面光配向制御は、基板表面の光反応を用いるのが一般的であるが、最近申請者は、側鎖型液晶高分子の薄膜にて、空気側(自由界面)から光配向操作が可能であ
ることを見出した。これまでは、予め液晶高分子を合成しておき製膜し、光配向に行う操作である。本課題は、一歩段階を進め、モノマー膜を作製しておき、空気側から、自由界面グラフト重合とも呼べる高分子合成の新たなプラットフォームを構築できるのではないかとの着想の研究である。高分子薄膜での重合プロセスにおける新たな手法提案となるとともに、高分子表面加工法が開発される可能性もある。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (31 results)

All 2023 2022 2021 Other

All Journal Article (11 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 9 results,  Open Access: 5 results) Presentation (17 results) (of which Int'l Joint Research: 5 results,  Invited: 10 results) Book (2 results) Remarks (1 results)

  • [Journal Article] alignment and Photofixation of Chromonic Mesophase in Ionic Linear Polysiloxanes Using a Dual Irradiation System2023

    • Author(s)
      Mitsuo Hara, Ayaka Masuda, Shusaku Nagano, Takahiro Seki
    • Journal Title

      Crystals

      Volume: 13 Issue: 2 Pages: 326-326

    • DOI

      10.3390/cryst13020326

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Induction of Highly Ordered Liquid Crystalline Phase of an Azobenzene Side Chain Polymer by Contact with 4′-Pentyl-4-cyanobiphenyl: An In Situ Study2023

    • Author(s)
      Chikara Kawakami, Mitsuo Hara, Shusaku Nagano, Takahiro Seki
    • Journal Title

      Langmuir

      Volume: 39 Issue: 1 Pages: 619-626

    • DOI

      10.1021/acs.langmuir.2c02950

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Induced smectic E phase in a binary blend of side-chain liquid crystalline polymers2022

    • Author(s)
      Naoki Hida, Tatsunaga Nakajima, Mitsuo Hara, Takahiro Seki, Shusaku Nagano
    • Journal Title

      Macromolecular Rapid Communications

      Volume: 44 Issue: 5

    • DOI

      10.1002/marc.202200761

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The Effect of a Topcoat with Amorphous Polymer Layers on the Mesogen Orientation and Photoalignment Behavior of Side Chain Liquid Crystalline Polymer Films2022

    • Author(s)
      Mari Furuichi, Mitsuo Hara, Shusaku Nagano, Takahiro Seki
    • Journal Title

      Applied Sciences

      Volume: 12 Issue: 19 Pages: 9410-9410

    • DOI

      10.3390/app12199410

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Water-Retentive/Lipophilic Amphiphilic Surface Properties Attained by Hygroscopic Polysiloxane Ultrathin Films2022

    • Author(s)
      Mitsuo Hara, Yuuma Ueno, Shusaku Nagano, Takahiro Seki
    • Journal Title

      Journal of Fiber Science and Technology

      Volume: 78 Issue: 10 Pages: 169-177

    • DOI

      10.2115/fiberst.2022-0021

    • ISSN
      2189-7654
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Humidity-Induced Self-Assembled Nanostructure via Ion Aggregation in Ionic Linear Polysiloxanes2022

    • Author(s)
      Mitsuo Hara, Atsuki Kodama, Shohei Washiyama, Yoshihisa Fujii, Shusaku Nagano, Takahiro Seki
    • Journal Title

      Macromolecules

      Volume: - Issue: 11 Pages: 4313-4319

    • DOI

      10.1021/acs.macromol.2c00404

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Solvent- and light-sensitive AIEE-active azo dye: From spherical to 1D and 2D assemblies2022

    • Author(s)
      Mina Han, Ikue Abe, Jihun Oh, Jaehoon Jung, Young Ji Son, Jaegeun Noh, Mitsuo Hara, Takahiro Seki
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 2 Issue: 2 Pages: 965-965

    • DOI

      10.3390/ijms23020965

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Crystallization-Induced Uniform Nanodots Formation of Titanium Dioxide Films2022

    • Author(s)
      Mitsuo Hara, Ryota Oguri, Shingo Sarkar, Shusaku Nagano, Takahiro Seki
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 95 Issue: 2 Pages: 216-220

    • DOI

      10.1246/bcsj.20210391

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Unconventional Approaches to Light-Promoted Dynamic Surface Morphing on Polymer Films2022

    • Author(s)
      Zhang Dongyu、Liu Danqing、Ubukata Takashi、Seki Takahiro
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 95 Issue: 1 Pages: 138-162

    • DOI

      10.1246/bcsj.20210348

    • NAID

      130008159283

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 高分子と液晶と界面--データ駆動型手法への期待2022

    • Author(s)
      関 隆広
    • Journal Title

      表面と真空

      Volume: 65 Pages: 27-32

    • NAID

      130008140712

    • Related Report
      2021 Research-status Report
  • [Journal Article] 先人の偉業と雑感2021

    • Author(s)
      関 隆広
    • Journal Title

      液晶

      Volume: 25 Pages: 202-203

    • Related Report
      2021 Research-status Report
  • [Presentation] Photoalignment and Surface Morphing of LC Polymer Films from the Top Surface2022

    • Author(s)
      Takahiro Seki
    • Organizer
      Annual Meeting of Taiwan Liquid Crystal Society (2022 TLCS)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 光応答高分子システム---繊高研、資源研、名古屋大にて2022

    • Author(s)
      関 隆広
    • Organizer
      東京工業大学化学生命科学研究所 講演会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Light-driven Photoalignment and Surface Morphing in Polymer Films from the Top Surface2022

    • Author(s)
      Takahiro Seki
    • Organizer
      RadTech Asia 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 光応答システム構築における空気側界面の活用2022

    • Author(s)
      関 隆広
    • Organizer
      第40回高分子表面研究会基礎講座
    • Related Report
      2022 Annual Research Report
  • [Presentation] 分子集合に基づく光応答ソフトマテリアル構築の新手法の開発2022

    • Author(s)
      関 隆広
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] アゾベンゼン高分子薄膜表面にて誘起される高次液晶相2022

    • Author(s)
      河上 知良・滝島 啓介・原 光生 ・永野 修作 ・関 隆広
    • Organizer
      第71回高分子学会年次大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 自由界面を起点とした RAFT 光重合による側鎖型液晶高分子薄膜の調製2022

    • Author(s)
      古田 大輔 ・原 光生 ・関 隆広
    • Organizer
      第71回高分子学会年次大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 自由界面を起点とする光RAFT重合を用いた側鎖型液晶高分子薄膜の調製2022

    • Author(s)
      古田大輔,原 光生,関 隆広
    • Organizer
      2022年繊維学会年次大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 自由界面を開始点とする光RAFT 重合による側鎖型液晶高分子薄膜の調製2022

    • Author(s)
      古田大輔,原 光生,関 隆広
    • Organizer
      第71回高分子討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 高分子膜における空気表面の役割--液晶配向と表面レリーフ形成の観点から--2022

    • Author(s)
      関 隆広
    • Organizer
      第180回粘着研究会例会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Surface-mediated photoalignment of Liquid Crystalline Polymers2021

    • Author(s)
      Takahiro Seki
    • Organizer
      Spring Meeting of Polymer Society of Korea
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 光を使った高分子薄膜の配向と形態制御の新たな展開2021

    • Author(s)
      関 隆広
    • Organizer
      第70回高分子学会年次大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] New strategies for Photoalignment and Surface Morphing in Photoreponsive Liquid Crystalline Polymers2021

    • Author(s)
      Takahiro Seki
    • Organizer
      2021年WEB光化学討論会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Photo-triggered mass transport driven from the film surface2021

    • Author(s)
      Takahiro Seki
    • Organizer
      Optics in Liquid Crystals (OLC2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Specific molecular orientation and structure induction at the interface between nematic liquid crystal and azobenzene polymer film2021

    • Author(s)
      Chikara Kawakami, Mitsuo Hara, Keisuke Takishima, Shusaku Nagano,Takahiro Seki
    • Organizer
      Optics in Liquid Crystals (OLC2021)(
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 空気側の界面から操作する高分子膜の配向と構造2021

    • Author(s)
      関 隆広
    • Organizer
      21-2フォトニクスポリマー研究会(高分子学会)
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] アゾベンゼン高分子の光機能2021

    • Author(s)
      関 隆広
    • Organizer
      ラドテック研究会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Book] 高分子材料の事典(中條善樹ら編), 6基礎編, C機能性高分子, 6-21 光反応性高分子2022

    • Author(s)
      関 隆広
    • Total Pages
      2
    • Publisher
      朝倉書店
    • ISBN
      9784860435356
    • Related Report
      2022 Annual Research Report
  • [Book] Photoalignment of Liquid Crystalline Polymers Attained from the free Surface, chapter 10, Nonconventional Liquid Crystals and Their Applications (Sandeep Kumar & Wei Lee Eds.)2021

    • Author(s)
      Takahiro Seki, Nobuhiro Kawatsuki
    • Total Pages
      20
    • Publisher
      De Gruyter
    • ISBN
      9783110583038
    • Related Report
      2021 Research-status Report
  • [Remarks] 名古屋大学 大学院工学研究科 有機・高分子化学専攻 高分子化学講座 高分子組織化学グループ

    • URL

      http://www.chembio.nagoya-u.ac.jp/labhp/polymer3/index-j.html

    • Related Report
      2022 Annual Research Report

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Published: 2021-07-13   Modified: 2024-01-30  

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