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Development of an evaluation system for the stability of particle dispersions in non-aqueous liquids based on a new perspective

Research Project

Project/Area Number 21H01639
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26030:Composite materials and interfaces-related
Research InstitutionDoshisha University (2023)
Okayama University (2021-2022)

Principal Investigator

Naoyuki Ishida  同志社大学, 理工学部, 教授 (80344133)

Co-Investigator(Kenkyū-buntansha) 森 隆昌  法政大学, 生命科学部, 教授 (20345929)
今村 維克  岡山大学, 環境生命自然科学学域, 教授 (70294436)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2023: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2022: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
Keywords分散評価体系 / 非水系 / 微粒子 / 相互作用力 / 相互作用 / 有機溶媒 / 原子間力顕微鏡 / 非水溶媒 / 分散凝集 / 相互作用測定 / パルスNMR / 表面間相互作用 / 分子配向構造 / 直鎖炭化水素 / 溶媒和力 / 表面間力
Outline of Research at the Start

非水系の溶液を用いた微粒子分散系は、多くの工業プロセスにおいて重要であるが、非水系の分散現象は、支配要因である非水溶媒中の表面間の相互作用力への理解が不十分であるため、ほとんど体系化されていない。本研究では、表面と溶媒分子の親和性を基軸とした新しい視点に基づき、これが表面間の相互作用にもたらす影響を明らかにすることで、「表面・溶媒の種類と組合せから系の分散・凝集が予測できる」体系を構築する。

Outline of Final Research Achievements

The interaction forces between solid surfaces in organic solvents were measured using atomic force microscopy (AFM). The correlation between the affinity of solvent molecules to surfaces was evaluated using pulsed nuclear magnetic resonance (NMR) to investigate their influence on particle dispersion stability. It was confirmed that a high affinity between the surface and solvent molecules leads to repulsion between the surfaces due to the formation of a solvation layer. Conversely, low affinity to the solvent molecules results in attraction between the surfaces due to the absence of a solvation layer. Additionally, it was found that the formation of this solvation layer on surfaces coated with linear hydrocarbons is significantly influenced by factors such as chain length and molecular shape, in addition to the affinity between the surface and solvent molecules.

Academic Significance and Societal Importance of the Research Achievements

工業プロセスや製品において、化粧品、塗料から電子デバイスや電池材料に至るまで非水系液体にコロイド粒子を分散させた分散系が数多く使われている。この分散系の分散・凝集の挙動評価はこれら分散系を扱う上で最も重要であるが、分散・凝集を司る非水系で微粒子の表面間力への理解がこれまでは決定的に不足しており、プロセスの最適化は、勘や経験に依存せざるをえなかった。今回の結果は、表面と溶媒分子の相互作用の視点から、非水系での表面間力を解釈・予測できることを示したものであり、今後の科学的根拠に基づいた分散プロセスの合理的な設計や高度な制御・最適化に大いに貢献するものと考えられる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (22 results)

All 2023 2022 2021

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (17 results) (of which Int'l Joint Research: 7 results,  Invited: 1 results)

  • [Journal Article] Evaluation of Hydrophobic Attraction between Polystyrene Layer and Silanated Silica Surface by Atomic Force Microscopy2023

    • Author(s)
      Okuda Yuta、Imamura Koreyoshi、Ishida Naoyuki
    • Journal Title

      Chemistry Letters

      Volume: 52 Issue: 12 Pages: 878-882

    • DOI

      10.1246/cl.230363

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evaluation of Interaction Forces between Hydrophobic Surfaces in Surfactant Solutions by Atomic Force Microscopy2023

    • Author(s)
      Shota Kage, Koreyoshi Imamura, Naoyuki Ishida
    • Journal Title

      Colloid and Polymer Science

      Volume: -

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Characterization of slurries for lithium-ion battery cathodes by measuring their flow and change in hydrostatic pressure over time and clarification of the relationship between slurry and cathode properties2023

    • Author(s)
      Takamasa Mori, Tsukasa Ochi, Kenta Kitamura
    • Journal Title

      Journal of Colloid and Interface Science

      Volume: 629 Pages: 36-45

    • DOI

      10.1016/j.jcis.2022.08.192

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dense immobilization of gold nanoparticles onto a cotton textile for obtaining plasmonic heating2022

    • Author(s)
      Fukuda Nobuko、Ishida Naoyuki
    • Journal Title

      MRS Advances

      Volume: - Issue: 20 Pages: 405-409

    • DOI

      10.1557/s43580-022-00262-x

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Direct measurements of interaction forces of bovine serum albumin and lysozyme with stainless steel by atomic force microscopy2021

    • Author(s)
      Kawaguchi Hikaru、Imanaka Hiroyuki、Imamura Koreyoshi、Ishida Naoyuki
    • Journal Title

      Colloids and Surfaces A: Physicochemical and Engineering Aspects

      Volume: 627 Pages: 127137-127137

    • DOI

      10.1016/j.colsurfa.2021.127137

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Importance of non-DLVO forces to the stability of colloidal dispersion systems: Evaluation by atomic force microscopy2023

    • Author(s)
      Naoyuki Ishida
    • Organizer
      2023 International Conference on Advanced Nano-Micro Materials
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Exploring the characteristics of “short-range” hydrophobic attraction between silanated silica surfaces2023

    • Author(s)
      Naoyuki Ishida, Yurika Nakanyama, Kohei Matsuo, Shota Kage, Koreyoshi Imamura
    • Organizer
      The 37th Conference of the European Colloid and Interface Society
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 疎水性引力の起源は現在どの程度理解されているのか?2023

    • Author(s)
      石田 尚之,松尾 康平,鹿毛 翔太, 今村 維克
    • Organizer
      第74回コロイドおよび界面化学討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 有機溶媒中の炭化水素被覆表面間力に与える表面近傍の溶媒分子構造の影響2023

    • Author(s)
      宇高 渉吾,鹿毛 翔太, 今村 維克,石田 尚之
    • Organizer
      第74回コロイドおよび界面化学討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] ブロックコポリマー水溶液中でのシリカ表面間力のAFM測定:高濃度共存イオンの影響2023

    • Author(s)
      中山 友梨香,鹿毛 翔太, 今村 維克,石田 尚之
    • Organizer
      第74回コロイドおよび界面化学討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 疎水性基板上におけるシリカ粒子を含む水-ブタノール液滴の蒸発挙動とその乾燥構造2023

    • Author(s)
      野島 邦仁,鹿毛 翔太, 今村 維克,石田 尚之
    • Organizer
      化学工学会福井大会2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] シリカ粒子間の水和力に与える表面状態とイオン種の影響:原子間力顕微鏡による評価2022

    • Author(s)
      石田尚之,秋田翔貴,小寺正修,今村維克
    • Organizer
      第59回粉体に関する討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 有機溶媒中の炭化水素被覆表面間に働く短距離力:表面と溶媒分子の親和性および構造の影響2022

    • Author(s)
      宇高渉吾,今村維克,石田尚之
    • Organizer
      第73回コロイドおよび界面化学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 分散・凝集を司る表面間力:直接測定から見えるもの2022

    • Author(s)
      石田尚之
    • Organizer
      関西接着ワークショップ第3回研究会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Exploring the characteristics of “short-range” hydrophobic attraction between silanated silica surfaces and its origin2022

    • Author(s)
      Naoyuki Ishida, Masato Itakura, Kohei Matsuo, Koreyoshi Imamura
    • Organizer
      51st Biennial Assembly of the German Colloid Society
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 微粒子の分散と表面間力に与える表面有機分子の影響:AFMによる直接測定2022

    • Author(s)
      石田尚之,宇高渉吾,今村維克
    • Organizer
      第56回粉体技術討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Affinity between Surface and Solvent Molecules Dominates the Interaction Forces between Surfaces in Organic Solvents2022

    • Author(s)
      Naoyuki Ishida, Akifumi Ohnishi, Shogo Udaka, Koreyoshi Imamura
    • Organizer
      36th Conference of the European Colloid and Interface Society
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Exploring the characteristics of “short-range” hydrophobic attraction between silanated silica surfaces2022

    • Author(s)
      Naoyuki Ishida, Masato Itakura, Kohei Matsuo, Koreyoshi Imamura
    • Organizer
      17th Conference of the International Association of Colloid and Interface Scientists
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] パルスNMR法による粒子表面-溶媒分子間相互作用の評価と有機溶媒中の微粒子分散2022

    • Author(s)
      石田尚之
    • Organizer
      粉体工学会2022年度春期研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] An AFM study on the interaction forces between silanated silica surfaces in organic solvents: Effect of the interactions on stability of particle dispersions2021

    • Author(s)
      Naoyuki Ishida
    • Organizer
      APT2021: 8th Asian Particle Technology Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Conformational Transitions of Poly (N-isopropylacrylamide) layers on silica in alcohols and binary solvents2021

    • Author(s)
      Naoyuki Ishida
    • Organizer
      第72回コロイドおよび界面化学討論会(国際シンポジウム)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 溶媒緩和NMRによる有機溶媒中での固体表面-溶媒分子間の親和性の評価と表面間力への影響の解析2021

    • Author(s)
      石田尚之
    • Organizer
      第72回コロイドおよび界面化学討論会
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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