Next Article in Journal
A Preliminary Study to Enhance the Tribological Performance of CoCrMo Alloy by Fibre Laser Remelting for Articular Joint Implant Applications
Previous Article in Journal
Improvement of Thrust Bearing Calculation Considering the Convectional Heating within the Space between the Pads
Previous Article in Special Issue
Testing of WS2 Nanoparticles Functionalized by a Humin-Like Shell as Lubricant Additives
Article Menu
Issue 1 (March) cover image

Export Article

Open AccessArticle
Lubricants 2018, 6(1), 23;

Tribological Performance of Phosphonium Ionic Liquids as Additives in Lithium Lubricating Grease

School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
Author to whom correspondence should be addressed.
Received: 8 January 2018 / Revised: 14 February 2018 / Accepted: 20 February 2018 / Published: 27 February 2018
(This article belongs to the Special Issue Novel Lubricant Additives)
Full-Text   |   PDF [18400 KB, uploaded 27 February 2018]   |  


Three oil–miscible phosphonium ionic liquids with different structures were synthesized and used as additives for a Poly Alpha Olefin 10 (PAO 10) lithium lubricating grease. Different from other additives, the ionic liquids participated in saponification and were trapped in the entanglement network formed by the thickener. The effects of the ionic liquids on the rheological properties of lithium lubricating grease were characterized through a small-amplitude oscillatory shear (SAOS) measurement. The tribological performances of the lubricating greases were determined on a four-ball friction tester. The addition of phosphonium ionic liquids caused a decrease in the storage (G′) and loss (Gʺ) modulus of lubricating grease. However, the ionic liquids were found to be effective lubricant additives for improving the friction-reducing and antiwear properties of PAO 10 lithium lubricating grease. View Full-Text
Keywords: lithium lubricating grease; ionic liquid; additive; rheology lithium lubricating grease; ionic liquid; additive; rheology

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Wang, Z.; Chang, J.; Cai, C. Tribological Performance of Phosphonium Ionic Liquids as Additives in Lithium Lubricating Grease. Lubricants 2018, 6, 23.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Lubricants EISSN 2075-4442 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top