Ionic liquids as tribological performance improving additive for in-service and used fully-formulated diesel engine lubricants.

Anand, M., Hadfield, M., Viesca, J.L., Thomas, B., Hernandez Battez, A. and Austen, S., 2015. Ionic liquids as tribological performance improving additive for in-service and used fully-formulated diesel engine lubricants. Wear, 334-5, 67 - 74 .

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DOI: 10.1016/j.wear.2015.01.055

Abstract

In recent years, several papers have been published that investigate the potential use of ionic liquids (ILs) as additives in lubricants. However, corrosive attack of ILs on lubricated metal surfaces and low miscibility of ILs in the non-polar oils are major obstacles to maintaining an optimum lubrication performance level. High miscibility and no corrosive behaviour of Trihexyltetradecyl phosphonium bis(2,4,4-tri-methylpentyl) phosphinate and Trihexyltetradecyl phosphonium bis(2-ethylhexyl) phosphate, as lubricating oil additives have recently been described in literature. This article presents work on using these phosphonium based ILs as an additive in the fully formulated diesel engine lubricants. This approach could allow the used lubricants to recover their tribological performance for further use at the end of service life. This extension of service life has the potential to generate significant economic and environmental benefits. Also it will add to the much needed knowledge about the effect of interaction between ILs and existing additives in engine-aged lubricants on the tribological performance of ring-liner tribo-system of diesel engines. Results revealed an improvement in friction and antiwear performance of used lubricant by addition of both ILs. However an increase in wear was noted for new (fresh) and in-service lubricant samples. An interesting interference between existing lubricant additives and added ILs in a boundary film formation process has been observed.

Item Type:Article
ISSN:1873-2577
Uncontrolled Keywords:Ionic liquids; Antiwear; Lubricant additives; Boundary lubrication; Surface analysis
Subjects:UNSPECIFIED
Group:Faculty of Science and Technology
ID Code:22066
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:10 Jun 2015 11:44
Last Modified:10 Jun 2015 11:44

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