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Tribological properties of crown‐type phosphate ionic liquids as lubricating additives in rapeseed oils
Author(s) -
Jiang Dong,
Hu Litian,
Feng Dapeng
Publication year - 2013
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.1199
Subject(s) - ionic liquid , tribology , materials science , rapeseed , phosphate , solubility , lubrication , ionic bonding , base oil , chemical engineering , metallurgy , composite material , chemistry , organic chemistry , ion , scanning electron microscope , catalysis , food science , engineering
ABSTRACT The friction and wear properties of rapeseed oils with different concentrations and crown‐type phosphate ionic liquids were studied by an Optimol SRV oscillating friction and wear tester. Crown‐type phosphate ionic liquids have better solubility than conventional ionic liquids in rapeseed oils. The tribological test results showed that the crown‐type phosphate ionic liquids as lubricating additives in rapeseed oil exhibited better tribological performance than the base oil for steel/steel friction pair under various loads. It is noted that the friction pair showed the least friction coefficient and wear volume when the concentration of ionic liquids was 1 wt.%. The better tribological properties of friction pair should be attributed to the effective boundary films formed in the worn surface, on various tribochemical products, organometallic products and iron oxides. Copyright © 2012 John Wiley & Sons, Ltd.