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Tribology Letters
Erschienen in: Tribology Letters 3/2008

01.06.2008 | Original Paper

The Tribological Properties of Ionic Liquids Composed of Trifluorotris(pentafluoroethyl) Phosphate as a Hydrophobic Anion

verfasst von: Ichiro Minami, Mamoru Kita, Tomoo Kubo, Hidetaka Nanao, Shigeyuki Mori

Erschienen in: Tribology Letters | Ausgabe 3/2008

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Abstract

The tribological properties of trifluorotris(pentafluoroethyl) phosphate [(C2F5)3PF 3 − , FAP]-derived ionic liquids were evaluated under boundary conditions. The anion is hydrophobic in comparison with bis(trifluoromethylsulfonyl)imide [(CF3SO2)2N−, TFSI]. 1,3-Dialkylimidazolium salts of FAP provided much lower friction than 1,3-dialkylimidazolium salts of TFSI. In addition, the FAP salts exhibit better anti-wear properties than the TFSI salts. Another advantage of the FAP anion is availability of several cations to prepare ionic liquids. For example, tetraalkylphosphonium, N,N-dialkylpyrrolidium, and tetramethylisouronium salts of FAP provided friction coefficient of approximately 0.1. Straight-chain carboxylic acids as model friction-reducing additives improved the tribological properties of the FAP salts. Surface analyses were conducted to study the boundary film formed by rubbing. It was found that the boundary film is composed of adsorbed anion on uppermost surfaces and reacted anion on sub-surfaces. The model friction-reducing additives were found on the rubbed surfaces.
Vorheriger Artikel Friction, Wear, and Aging of an Alkoxy-monolayer Boundary Lubricant on Silicon
Nächster Artikel A Model for Potential Adhesive Wear Particle at Sliding Inception of a Spherical Contact

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Metadaten
Titel
The Tribological Properties of Ionic Liquids Composed of Trifluorotris(pentafluoroethyl) Phosphate as a Hydrophobic Anion
verfasst von
Ichiro Minami
Mamoru Kita
Tomoo Kubo
Hidetaka Nanao
Shigeyuki Mori
Publikationsdatum
01.06.2008
Verlag
Springer US
Erschienen in
Tribology Letters / Ausgabe 3/2008
Print ISSN: 1023-8883
Elektronische ISSN: 1573-2711
DOI
https://doi.org/10.1007/s11249-008-9329-y

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