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Measurement and modeling of surface reaction of reactive species in surface treatment using atmospheric pressure plasma

Research Project

Project/Area Number 22K18789
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 21:Electrical and electronic engineering and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Ono Ryo  東京大学, 大学院新領域創成科学研究科, 教授 (90323443)

Project Period (FY) 2022-06-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2023: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2022: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Keywords活性種 / 大気圧プラズマ / 表面処理 / ポリマー / 表面反応 / プラズマ / 選択的供給 / モデリング / VUV法
Outline of Research at the Start

大気圧プラズマを用いた固体、液体、生体等の表面処理では、プラズマで生成された活性種の表面反応が重要である。しかし、活性種の表面反応は計測が困難なため、その反応機構はよく分かっていない。本研究では、これまで困難であった活性種の表面反応計測を、申請者が開発した独自の手法で行い、さらにその計測結果をもとに表面反応モデルを構築する。

Outline of Final Research Achievements

In this study, we quantitatively measured the surface reaction of reactive species on polypropylene surfaces using vacuum ultraviolet photodissociative reactive species supply (VUV PRS) method, an original technique to selectively deliver reactive species such as OH and O, which are important in material surface treatment using atmospheric-pressure plasma. We succeeded in quantitatively measuring the rates of surface reactions of OH and O. The results also indicated the existence of a reaction in the reverse direction, where the reaction saturates or the surface modification degenerates due to an excessive supply of reactive species. Based on the results of this measurement, a simulation model of the surface reaction of reactive species was developed with the aid of quantum chemical calculations and molecular dynamics calculations.

Academic Significance and Societal Importance of the Research Achievements

大気圧プラズマによる材料表面処理は、産業界で広く使われている。これら表面処理では活性種の表面反応が最も重要だが、その計測は困難でこれまで例がなかった。本研究では独自の技術を用いてこの計測を可能とし、ポリマー表面のOおよびOHの反応を計測した。また、この計測結果に基づく表面反応モデルの構築も行った。これまで経験則に頼らざるを得なかった大気圧プラズマ表面処理に、計測および反応モデルを導入した本研究の意義は大きい。また、大気圧プラズマは液面や生体への照射も行われており、本研究手法は将来的にこれらの表面反応解明にもつながる点でも意義は大きい。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (12 results)

All 2024 2023 2022

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (7 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Mechanism behind polypropylene surface modifications by OH radicals: An experimental study2024

    • Author(s)
      Du Hao、Komuro Atsushi、Seki Yuichi、Kobayashi Masaki、Ono Ryo
    • Journal Title

      Applied Surface Science

      Volume: 648 Pages: 159086-159086

    • DOI

      10.1016/j.apsusc.2023.159086

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Theoretical Prediction of the Reaction Probabilities of H, O, and OH Radicals on the Polypropylene Surface2024

    • Author(s)
      Du Hao、Sato Masahiro、Komuro Atsushi、Ono Ryo
    • Journal Title

      The Journal of Physical Chemistry A

      Volume: 128 Issue: 6 Pages: 1041-1048

    • DOI

      10.1021/acs.jpca.3c07531

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Theoretical mechanism behind the higher efficiency of O than OH radicals in polypropylene surface modification: a molecular dynamics study2024

    • Author(s)
      Du Hao、Sato Masahiro、Komuro Atsushi、Ono Ryo
    • Journal Title

      Plasma Sources Science and Technology

      Volume: 33 Issue: 2 Pages: 025009-025009

    • DOI

      10.1088/1361-6595/ad2118

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Quantitative and selective study of the effect of O radicals on polypropylene surface treatment2023

    • Author(s)
      Du Hao、Komuro Atsushi、Ono Ryo
    • Journal Title

      Plasma Sources Science and Technology

      Volume: 32 Issue: 7 Pages: 075013-075013

    • DOI

      10.1088/1361-6595/ace5d3

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Selective supply of atomic oxygen to a surface placed in room air using vacuum ultraviolet photolysis of carbon dioxide2023

    • Author(s)
      Ono Ryo、Battulga Tuguldur、Du Hao、Komuro Atsushi
    • Journal Title

      Plasma Sources Science and Technology

      Volume: 32 Issue: 3 Pages: 035004-035004

    • DOI

      10.1088/1361-6595/acc131

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] CO2-VUV法のシミュレーションの検証およびO原子のポリマー表面反応計測への応用2024

    • Author(s)
      木全 悠人, 小室 淳史, 小野 亮
    • Organizer
      2024年度静電気学会春期講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Quantitative measurements of the effects of OH, O, and O3 on surface treatments of polymers using VUV photodissociation method2023

    • Author(s)
      R. Ono, H. Du, and A. Komuro
    • Organizer
      35th International Conference on Phenomena in Ionized Gases
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Synergistic effects of oxygen radicals and ozone on surface treatment of polypropylene measured by newly developed VUV photodissociation method2023

    • Author(s)
      H. Du, A. Komuro, and R. Ono
    • Organizer
      25th International Symposium on Plasma Chemistry
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Surface modification of polypropylene by oxygen radicals: A molecular dynamic simulation study2023

    • Author(s)
      H. Du, M. Sato, A. Komuro, and R. Ono
    • Organizer
      第47回静電気学会全国大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] CO2-VUV法のシミュレーションの検証およびO原子のポリマー表面反応計測への応用2023

    • Author(s)
      木全 悠人, 小室 淳史, 小野 亮
    • Organizer
      第47回静電気学会全国大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Based on VUV photodissociation method to treat polypropylene surface: The synergistic effects between oxygen radicals and ozone2023

    • Author(s)
      H. Du, A. Komuro, R. Ono
    • Organizer
      2023年度静電気学会春期講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Quantum chemical calculation for surface reaction probabilities of OH and O with polypropylene2022

    • Author(s)
      H. Du, M. Sato, A. Komuro, R. Ono
    • Organizer
      第46回静電気学会全国大会
    • Related Report
      2022 Research-status Report

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Published: 2022-07-05   Modified: 2025-01-30  

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