Tribotronic control of friction in oil-based lubricants with ionic liquid additives

Title: Tribotronic control of friction in oil-based lubricants with ionic liquid additives
Creator: Cooper, P. K.; Li, H.; Rutland, M. W.; Webber, Grant B.; Atkin, R.
Relation: Physical Chemistry Chemical Physics Vol. 18, Issue 34, p. 23657-23662
Publisher Link: http://dx.doi.org/10.1039/c6cp04405k
Publisher: Royal Society of Chemistry
Resource Type: journal article
Date: 2016
Description: Atomic force microscopy (AFM) reveals that tribotronic control of friction using an external potential applied to a gold surface is possible for ionic liquid (IL) concentrations as low as 5 mol% in hexadecane. The IL used is trihexyl(tetradecyl)phosphonium bis(2,4,4-trimethylpentyl)phosphinate, in which both the cation and anion have surfactant-like structures, and is miscible with hexadecane in all proportions. For IL concentrations less than 5 mol% friction does not vary with applied potential, but for 5 mol% and above changing the potential changes the composition of the IL boundary layer from cation-enriched (negative potentials) to anion-enriched (positive potentials). As the lubricities of the cation-rich and anion-rich boundary layers differ, this enables active control of friction in oil-based lubricants.
Subject: atomic force microscopy (AFM); ionic liquids; tribotronic control; friction
Identifier: http://hdl.handle.net/1959.13/1319064
Identifier: uon:23775
Identifier: ISSN:1463-9084
Language: eng
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