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Tribotronic control of friction in oil-based lubricants with ionic liquid additives
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science.
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2016 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 18, no 34, 23657-23662 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2016. Vol. 18, no 34, 23657-23662 p.
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Chemical Sciences
URN: urn:nbn:se:kth:diva-193397DOI: 10.1039/c6cp04405kISI: 000382107200025PubMedID: 27511143ScopusID: 2-s2.0-84984622214OAI: diva2:1037203

QC 20161014

Available from: 2016-10-14 Created: 2016-10-03 Last updated: 2016-10-14Bibliographically approved

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Rutland, Mark W.
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