Lubrication performance of an ammonium cation-based ionic liquid used as an additive in a polar oil

Authors: Viesca, J.L., Mallada, M.T., Blanco, D., Fernández-González, A., Espina-Casado, J., González, R., Hernández Battez, A.

Journal: Tribology International

Publication Date: 01/01/2017

Volume: 116

Pages: 422-430

ISSN: 0301-679X

DOI: 10.1016/j.triboint.2017.08.004

Abstract:

This paper studies the tribological behavior of the ionic liquid methyltrioctylammonium bis(trifluoromethylsulfonyl)imide ([N1888][NTf2]) as additive at different concentrations (1.25, 2.50, 3.75 and 5.00 wt%) in a polar base oil (diester). A tribometer using a ball-on-disk reciprocating configuration under fully flooded lubrication was used at a frequency of 15 Hz, at three different loads (40, 80 and 120 N), stroke length of 4 mm, and duration of 45 min. Worn surface on the disk was studied by confocal microscopy, SEM and XPS. Main results showed similar coefficient of friction for all lubricant samples; but different wear results were found at different loads, probably related with the chemical states found for fluorine on the worn surface and the temperature-dependent adsorption-desorption processes.

https://eprints.bournemouth.ac.uk/29877/

Source: Scopus