Article Title
Synergistic lubricating effect of graphene/ionic liquid composite material used as an additive
Keywords
grapheme (G), ionic liquid (IL), synergistic lubrication, protective films, out-of-plane puckering mechanism
Abstract
We prepared a graphene/ionic liquid (G/IL) composite material by the hybridization of G and an IL for use as a lubricating oil additive. The friction coefficient and wear volume of a base oil containing 0.04 wt% of the G/IL composite was reduced by 45% and 90%, respectively. Furthermore, the base oil containing the G/IL composite exhibited better lubricating properties than the base oil containing G, IL, or a mixture of IL and G at the same mass fraction. A synergistic lubrication mechanism was also revealed. The G/IL composite was adsorbed and deposited on the wear surface, forming a more ordered protective film and a unique tribochemical reaction film during rubbing. Therefore, the G/IL composite exhibited the synergistic lubricating effects of G and IL, which significantly improved the lubricating performance of the base oil. This study also suggested a way to limit the out-of-plane puckering of G at the macroscale.
Publisher
Tsinghua University Press
Recommended Citation
LIU, Lincong; ZHOU, Ming; MO, Youtang; BAI, Pengpeng; WEI, Qilin; JIN, Long; YOU, Shengli; WANG, Mingyue; LI, Liangchuan; CHEN, Xin; LI, Xiao; and TIAN, Yu
(2020)
"Synergistic lubricating effect of graphene/ionic liquid composite material used as an additive,"
Friction: Vol. 9:
Iss.
6, Article 17.
DOI: https://doi.org/10.1007/s40544-020-0442-8
Available at:
https://dc.tsinghuajournals.com/friction/vol9/iss6/17
