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Molecules 2009, 14(6), 2286-2305; doi:10.3390/molecules14062286
Ionic Liquids in Tribology
Department of Chemical Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate, 020-8551, Japan
Received: 24 May 2009; in revised form: 20 June 2009 / Accepted: 23 June 2009 / Published: 24 June 2009
(This article belongs to the Special Issue Ionic Liquids)
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Abstract: Current research on room-temperature ionic liquids as lubricants is described. Ionic liquids possess excellent properties such as non-volatility, non-flammability, and thermo-oxidative stability. The potential use of ionic liquids as lubricants was first proposed in 2001 and approximately 70 articles pertaining to fundamental research on ionic liquids have been published through May 2009. A large majority of the cations examined in this area are derived from 1,3-dialkylimidazolium, with a higher alkyl group on the imidazolium cation being beneficial for good lubrication, while it reduces the thermo-oxidative stability. Hydrophobic anions provide both good lubricity and significant thermo-oxidative stability. The anions decompose through a tribochemical reaction to generate metal fluoride on the rubbed surface. Additive technology to improve lubricity is also explained. An introduction to tribology as an interdisciplinary field of lubrication is also provided.
Keywords: synthetic lubricant; surface chemistry; molecular design; friction and wear; thermo-oxidative stability
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MDPI and ACS Style
Minami, I. Ionic Liquids in Tribology. Molecules 2009, 14, 2286-2305.AMA Style
Minami I. Ionic Liquids in Tribology. Molecules. 2009; 14(6):2286-2305.Chicago/Turabian Style
Minami, Ichiro. 2009. "Ionic Liquids in Tribology." Molecules 14, no. 6: 2286-2305.