Evaluation of the dynamics of lubricating greases by dielecteric

• Project/Area Number: 21560144
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Design engineering/Machine functional elements/Tribology
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: SUZUKI Akihito 東京工業大学, 大学院・理工学研究科, 助教 (30235931)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2009: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: トライボロジー / 潤滑グリース / 誘電緩和 / 増ちょう剤 / 基油 / レオロジー / 網目構造 / 緩和時間 / 誘電緩和現象 / ヒドロキシル基

Research Abstract

Molecular dynamics of base oil and thickeners in the lubricating greases had been investigated with dielectric spectroscopy. Dielectric relaxations of base oil and thickener were observed independently. From the comparison of dielectric relaxation behavior and rheological properties of lubricating greases, it was found that temperature dependence of dielectric relaxation time of the base oil in lubricating grease is very similar with that of dynamic viscoelasticity and creep characteristics of lubricating grease. No clear correlation was found between dielectric relaxation of thickener and rheological properties of lubricating greases.

Research Products

• [Journal Article] Relation between Dielectric Relaxation and Rheological Properties of Lubricating Greases (2012)
  • Author(s): Akihito Suzuki, Shinichi Kotake, Masabumi Masuko, Yukitoshi Fujinami
  • Journal Title: Tribology Online Volume: 7 Issue: 3 Pages: 165-170
  • DOI: 10.2474/trol.7.165
  • NAID: 130002099859
  • ISSN: 1881-218X, 1881-2198
  • Peer Reviewed
• [Presentation] Relation between Dielectric relaxation and Rheological Properties of Lubricating Greases (2011)
  • Author(s): Akihito Suzuki, Shinichi Kotake, Masabumi Masuko, Yukitoshi Fujinami
  • Place of Presentation: Hiroshima, JAPAN
  • Year and Date: 2011-11-02
• [Presentation] Relation between Dielectric Relaxation and Rheological Properties of Lubricating Greases (2011)
  • Author(s): Akihito Suzuki
  • Organizer: International Tribology Conference, Hiroshima 2011
  • Place of Presentation: 広島国際会議場(広島県)
  • Year and Date: 2011-11-02
• [Presentation] 12-ヒドロキシステアリン酸リチウムを増ちょう剤に用いたグリースの誘電緩和と力学緩和 (2011)
  • Author(s): 鈴木章仁,小竹伸一,益子正文,藤浪行敏
  • Organizer: 日本トライボロジー学会トライボロジー会議
  • Place of Presentation: 東京,国立オリンピック記念青少年総合センター
  • Year and Date: 2011-05-24
• [Presentation] 12-ヒドロキシステアリン酸リチウムを増ちょう剤に用いたグリースの誘電緩和と力学緩和 (2011)
  • Author(s): 鈴木章仁
  • Organizer: トライボロジー会議2011春東京
  • Place of Presentation: 国立オリンピック記念青少年センター(東京都)
  • Year and Date: 2011-05-24
• [Presentation] Dielectric relaxation behavior of polyolester oil based greases with lithium 12-hydroxy stearate thickener (2010)
  • Author(s): Akihito Suzuki, Shinichi Kotake, Masabumi Masuko, Yukitoshi Fujinami
  • Organizer: ASIATRIB 2010
  • Place of Presentation: Perth, AUSTRALIA
  • Year and Date: 2010-12-06
• [Presentation] Dielectric Relaxation Behavior of Polyolester Oil Based Greases with Lithium 12-Hydroxy Stearate Thickener (2010)
  • Author(s): Akihito Suzuki
  • Organizer: International Tribology Congress - ASIATRIB 2010
  • Place of Presentation: Hyatt Regency Perth(オーストラリア)
  • Year and Date: 2010-12-06
• [Presentation] 12-ヒドロキシステアリン酸リチウムを増ちょう剤に用いたポリオールエステルグリースの誘電緩和挙動 (2010)
  • Author(s): 小竹伸一,鈴木章仁,益子正文,藤浪行敏
  • Organizer: 日本トライボロジー学会トライボロジー会議
  • Place of Presentation: 福井,福井大学文京キャンパス
  • Year and Date: 2010-09-15
• [Presentation] 12-ヒドロキシステアリン酸リチウムを増ちょう剤に用いたポリオールエステルグリースの誘電緩和挙動 (2010)
  • Author(s): 小竹伸一
  • Organizer: 日本トライボロジー学会
  • Place of Presentation: 福井大学文京キャンパス(福井県)
  • Year and Date: 2010-09-15
• [Presentation] 12-ヒドロキシステアリン酸リチウムを増ちょう剤に用いたPAOグリースの誘電緩和挙動 (2010)
  • Author(s): 小竹伸一,鈴木章仁,益子正文,藤浪行敏
  • Organizer: 日本トライボロジー学会トライボロジー会議
  • Place of Presentation: 東京,国立オリンピック記念青少年総合センター
  • Year and Date: 2010-05-18
• [Presentation] 12-ヒドロキシステアリン酸リチウムを増ちょう剤に用いたPAOグリースの誘電緩和挙動 (2010)
  • Author(s): 小竹伸一
  • Organizer: 日本トライボロジー学会
  • Place of Presentation: 国立オリンピック記念青少年総合センター(東京都)
  • Year and Date: 2010-05-18
• [Presentation] Dielectric Relaxation Behavior of Lithium 12-Hydroxy Stearate Grease (2009)
  • Author(s): Akihito Suzuki, Shinichi Kotake, Masabumi Masuko, Yukitoshi Fujinami
  • Organizer: Proceedings of World Tribology Congress2009
  • Place of Presentation: Kyoto, JAPAN
  • Year and Date: 2009-09-10
• [Presentation] Dielectric Relaxation Behavior of Lithium 12-Hydroxy Stearate Grease (2009)
  • Author(s): Akihito Suzuki
  • Organizer: World Tribology Congress 2009
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 2009-09-10