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Categorization of Boundary Layers Formed by Adsorption of a Couple of Additives and Its Tribological Property

Research Project

Project/Area Number 17H03167
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Design engineering/Machine functional elements/Tribology
Research InstitutionKyoto University (2019)
Doshisha University (2017-2018)

Principal Investigator

Tomoko Hirayama  京都大学, 工学研究科, 教授 (00340505)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2019: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2017: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Keywordsトライボロジー / 潤滑 / 複数添加剤 / 固液界面分析 / 添加剤 / 界面構造 / 境界潤滑 / 構造解析 / ナノトライボロジー特性 / 境界潤滑層
Outline of Final Research Achievements

Categorization of boundary layers formed by MoDTC and organic friction modifier (OFM) was examined from the viewpoint of the interfacial structure. In addition, their nanotribological properties were evaluated by atomic force microscopy with colloidal probe. The obtained results showed that OFM was made condensing at the interface by the existence of MoDTC, and that the coefficient of friction was the lowest when the OFM was mixed with MoDTC in lubricant. A series of experiments proved that the formation of thick and sustainable boundary layer is important, resulting in the lower coefficient of friction by a new mechanism.

Academic Significance and Societal Importance of the Research Achievements

形成される厚く密度の高い境界潤滑層がどのような化学構造および形態となっているのかに関しては多少疑問が残るものの、実摺動系における更なる摩擦低減への新規的なアプローチとして極圧剤と油性剤の併用が有効であることを界面構造および力学特性の両者から示すことができた。現在、さまざまな機器で同様となる極圧剤と油性剤の併用が検討されており、そのさきがけとなる実験結果の創出に成功したことから、今後、本研究の結果に即した添加剤の併用事例はますます増えるであろうことが期待できる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (15 results)

All 2019 2018 2017 Other

All Journal Article (4 results) (of which Peer Reviewed: 3 results) Presentation (9 results) (of which Int'l Joint Research: 9 results,  Invited: 5 results) Remarks (2 results)

  • [Journal Article] Growth of Adsorbed Additive Layer for Further Friction Reduction2019

    • Author(s)
      Tomoko Hirayama, Masayuki Maeda, Yuto Sasaki, Takashi Matsuoka, Hiroshi Komiya, Masahiro Hino
    • Journal Title

      Lubrication Science

      Volume: 31(5) Issue: 2 Pages: 171-178

    • DOI

      10.1002/ls.1485

    • NAID

      120006726154

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] トライボロジー現象解明に向けた量子ビーム分析の応用 【解説】2019

    • Author(s)
      平山朋子, 山下直輝
    • Journal Title

      トライボロジスト

      Volume: 64(11) Pages: 641-647

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Growth of Adsorbed Additive Layer for Further Friction Reduction2018

    • Author(s)
      Masayuki Maeda, Yuto Sasaki, Takashi Matsuoka, Hiroshi Komiya, Masahiro Hino
    • Journal Title

      Lubrication Science

      Volume: 1 Issue: 5 Pages: 1-8

    • DOI

      10.1002/ls.1420

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Cross-Sectional Imaging of Boundary Lubrication Layer Formed by Fatty Acid by Means of Frequency-Modulation Atomic Force Microscopy2017

    • Author(s)
      Tomoko Hirayama, Ryota Kawamura, Keita Fujino, Takashi Matsuoka, Hiroshi Komiya, Hiroshi Onishi
    • Journal Title

      Langmuir

      Volume: 33 Issue: 40 Pages: 10492-10500

    • DOI

      10.1021/acs.langmuir.7b02528

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Presentation] Neutron and AFM Studies for Understanding of Boundary Lubrication (Invited Talk)2019

    • Author(s)
      Tomoko Hirayama
    • Organizer
      46th Leeds-Lyon Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] What is the Best Design of Oil Additives for Friction Reduction? (Plenary Lecture)2019

    • Author(s)
      Tomoko Hirayama
    • Organizer
      International Tribology Conference Sendai 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Neutron and AFM studies for Understanding of Tribology (Invited Talk)2019

    • Author(s)
      Tomoko Hirayama
    • Organizer
      27th International Colloquium on Scanning Probe Microscopy
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Interfacial Structure and Nanotribological Property of Adsorption Layer Formed by Polyacrylate Type Friction Modifiers Having Poorly-Oil-Soluble Units2018

    • Author(s)
      Naohiro Kikuchi, Tomoko Hirayama, Hidetoshi Sakamoto, Takashi Matsuoka, Ko Onodera, Honami Watanabe, Takehisa Sato
    • Organizer
      STLE Tribology Frontiers
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Friction Reduction Effect by the Combination Use of MoDTC and Organic Friction Modifiers2018

    • Author(s)
      Yuto Sasaki, Tomoko Hirayama, Takashi Matsuoka, Hidetoshi Sakamoto, Toshiro Emura, Shintaro Kusuhara
    • Organizer
      STLE Tribology Frontiers
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Friction Reduction by the Combination Use of MoDTC and Organic Friction Modifier (Part 1: Interfacial Structure Analyzed by NR and ATR-IR)2017

    • Author(s)
      [83]Naohiro Kikuchi, Tomoko Hirayama, Hidetoshi Sakamoto, Takashi Matsuoka
    • Organizer
      BALTTRIB2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Friction Reduction by the Combination Use of MoDTC and Organic Friction Modifier (Part 2: Nanotribological Property Measured by Colloidal Probe AFM)2017

    • Author(s)
      [84]Yuto Sasaki, Tomoko Hirayama, Hidetoshi Sakamoto, Takashi Matsuoka
    • Organizer
      BALTTRIB
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] In-Situ Analysis and Evaluation of Adsorbed Additive Layer for Boundary Lubrication2017

    • Author(s)
      Tomoko Hirayama
    • Organizer
      ECOTRIB2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] In-Situ Analysis for Adsorbed Additive Layer on Metal Substrate and Its Nanotribological Properties2017

    • Author(s)
      Tomoko Hirayama
    • Organizer
      6th World Tribology Congress 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] 京都大学大学院 工学研究科 機械理工学専攻 機械機能要素工学研究室

    • URL

      https://www.me.t.kyoto-u.ac.jp/ja/research/introduction/kikaikinouyouso

    • Related Report
      2019 Annual Research Report
  • [Remarks]

    • URL

      https://www1.doshisha.ac.jp/~tribolab/

    • Related Report
      2017 Annual Research Report

URL: 

Published: 2017-04-28   Modified: 2021-02-19  

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