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Study on polymer surface properties by high-temperature AFM observation of poly(methyl methacrylate) (PMMA) isolated chains deposited on a PMMA molecularly flat substrate

Research Project

Project/Area Number 21K18993
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 InstitutionYamagata University

Principal Investigator

Kumaki Jiro  山形大学, 大学院有機材料システム研究科, 教授 (00500290)

Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2022: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2021: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywords高分子表面 / 分子運動 / ガラス転移点 / 原子間力顕微鏡 / 熱ナノインプリント / ポリメチルメタクリレート / 表面物性 / ガラス転移温度 / ラングミュア・ブロジェット膜 / 分子平滑基板 / Langmuir-Blodgett film / 表面ガラス転移温度 / 原子間力顕微鏡(AFM) / ラングミュア・ブロジェット膜
Outline of Research at the Start

近年、高分子材料は超薄膜として使用されるようになっており、表面・界面特性を把握することは極めて重要である。現在、高分子表面は不安定であり、表面のガラス転移温度は内部に比べて大幅に低下していると広く信じられている。最近、我々は熱プレスして作成したポリメチルメタクリレート(PMMA)の分子平滑基板の上にPMMA孤立鎖を積層し、原子間力顕微鏡(AFM)で観察することに成功し、驚くべきことに、構造が空気中、室温で数か月安定に存在することを明らかにした。本研究では、PMMA分子平滑板、その上のPMMA孤立鎖の耐熱性を高温AFMを用いて検討し、高分子表面の熱特性を文字通り、分子鎖レベルで初めて明確化する。

Outline of Final Research Achievements

It is well-known that the chain movements at polymer surface are significantly accelerated, however, the chain movements at the topmost surface have never been directly observed by atomic force microscopy (AFM). Then, in this study, we initially planned to evaluate chain movements using poly(methyl methacrylate) (PMMA) isolated chains deposited on a PMMA molecularly flat substrate. However, as the result of the research progress, we finally found that the chain movements of the topmost surface can be evaluated by in-situ real-time AFM observation of polymer surfaces at high temperatures for the first time. We also succeeded to evaluate the chain movements at the polymer surfaces in water for the first time.

Academic Significance and Societal Importance of the Research Achievements

高分子表面の特性を知ることは、超薄膜や医療材料等で益々重要になってきているが、従来、高分子最表面の分子運動を直接評価する方法は無かった。本研究の結果、高分子最表面分子の運動が、高分子表面を高温原子間力顕微鏡(AFM)で実時間観察することで直接評価できることが初めて明らかになった。また水中での高分子表面分子運動を同様に評価できることも示した。

Report

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

    (19 results)

All 2023 2022 2021 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 1 results) Presentation (11 results) (of which Int'l Joint Research: 3 results,  Invited: 5 results) Remarks (2 results)

  • [Journal Article] Crystallization of Star-Shaped Poly(L-lactide)s with Arm Chains Aligned in the Same Direction in Two-Dimensional Crystals in a Langmuir Monolayer2023

    • Author(s)
      Yamazaki Shota、Harada Mahoko、Watanabe Yuya、Lang Rongjian、Kato Takashi、Haba Osamu、Fukushima Kazuki、Kumaki Jiro
    • Journal Title

      Langmuir

      Volume: 39 Issue: 15 Pages: 5486-5494

    • DOI

      10.1021/acs.langmuir.3c00199

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Chain Movements at the Topmost Surface of Poly(methyl methacrylate) and Polystyrene Films Directly Evaluated by In Situ High-Temperature Atomic Force Microscopy2022

    • Author(s)
      Koike Kouki、Kumaki Jiro
    • Journal Title

      Langmuir

      Volume: 38 Issue: 45 Pages: 13707-13719

    • DOI

      10.1021/acs.langmuir.2c01788

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Chain Movements of a Molecularly Flat PMMA Substrate Surface Prepared by Thermal Imprinting with Mica and Isolated PMMA Chains Deposited on the PMMA Substrate Observed by AFM around the Bulk Tg2022

    • Author(s)
      Jin Ohkawa, Jiro Kumaki
    • Journal Title

      Polym. J.

      Volume: 54 Issue: 3 Pages: 281-292

    • DOI

      10.1038/s41428-021-00600-0

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Solubilization of Poly(styrene)(PS)-b-Poly(methyl methacrylate)(PMMA)-b-PS in Poly(n-nonyl acrylate) and PMMA Monolayers as Isolated Chains with Both PS Blocks Forming Separated Single-Block Particles2022

    • Author(s)
      Fumiki Honma, Jiro Kumaki
    • Journal Title

      Polym. J

      Volume: 54 Issue: 5 Pages: 687-696

    • DOI

      10.1038/s41428-022-00614-2

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Thermal Stabilities of a Molecularly Stepped PMMA Substrate Prepared by Thermal Nanoimprinting and Isolated PMMA Chains Deposited on It Evaluated by High-Temperature Atomic Force Microscopy2021

    • Author(s)
      Ryota Umetsu, Jiro Kumaki
    • Journal Title

      Polym. J.

      Volume: 53 Issue: 10 Pages: 1111-1121

    • DOI

      10.1038/s41428-021-00508-9

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Molecular Combing of Various Poly(n-alkyl acrylate) Chains on Mica by the Dipping Method2021

    • Author(s)
      Akihiro Ohmatsuzawa, Moriya Kikuchi, Seigou Kawaguchi, Jiro Kumaki
    • Journal Title

      Langmuir

      Volume: 37 Issue: 24 Pages: 7556-7564

    • DOI

      10.1021/acs.langmuir.1c01054

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] PMMA, PS膜表面分子運動の高温in situ AFMによる観察2023

    • Author(s)
      小池仰輝、熊木治郎
    • Organizer
      第19回高分子表面研究討論会(高分子学会)
    • Related Report
      2022 Annual Research Report
  • [Presentation] 高分子膜表面分子運動の高温in-situ AFM観察2022

    • Author(s)
      小池仰輝、熊木治郎
    • Organizer
      第71回高分子学会年次大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] AFM Observation of Polymer Structures at the Molecular Level2022

    • Author(s)
      Jiro Kumaki
    • Organizer
      Virtual Royal Microscopical Society (RMS) AFM & SPM Meeting 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 高分子膜表面分子運動の高温in-situ AFM観察2022

    • Author(s)
      小池仰輝、熊木治郎
    • Organizer
      第71回高分子討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 高分子鎖構造の高分解能原子間力顕微鏡観察2022

    • Author(s)
      熊木治郎
    • Organizer
      龍谷大学学術講演会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] AFM Observation of Polymer Structures at the Molecular Level2022

    • Author(s)
      Jiro Kumaki
    • Organizer
      The Japan-Taiwan Bilateral Polymer Symposium 2022 (JTBPS2022)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 原子間力顕微鏡による高分子の高倍観察2021

    • Author(s)
      熊木治郎
    • Organizer
      光ナノサイエンス特別講義(奈良先端科学技術大学院大学)
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 熱ナノインプリントで作成したPMMA分子平滑基板に積層したPMMA孤立鎖のAFM観察と耐熱性評価2021

    • Author(s)
      梅津亮汰、熊木治郎
    • Organizer
      第70回高分子学会年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] マイカ熱インプリントで作成したPMMA平滑基板とその上に積層したPMMA孤立鎖の高温実時間AFM観察2021

    • Author(s)
      大川迅、熊木治郎
    • Organizer
      第70回高分子討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] PMMA膜表面分子の高温AFM観察2021

    • Author(s)
      小池仰輝、大川迅、梅津亮汰、熊木治郎
    • Organizer
      2021高分子学会東北支部研究発表会
    • Related Report
      2021 Research-status Report
  • [Presentation] In Situ Real-Time Observations of isotactic Poly(methyl methacrylate)(it-PMMA) Crystallization in Langmuir Monolayers by AFM2021

    • Author(s)
      Jiro Kumaki
    • Organizer
      Sakura Science
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] 山形大学熊木研究室

    • URL

      https://kumaki-lab.yz.yamagata-u.ac.jp/index.html

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
  • [Remarks] 山形大学教員情報

    • URL

      https://yudb.kj.yamagata-u.ac.jp/html/100000173_ja.html

    • Related Report
      2022 Annual Research Report 2021 Research-status Report

URL: 

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

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