Synergistic lubricating effect of graphene/ionic liquid composite material used as an additive  

作　　者：Lincong LIU Ming ZHOU Youtang MO Pengpeng BAI Qilin WEI Long JIN Shengli YOU Mingyue WANG Liangchuan LI Xin CHEN Xiao LI Yu TIAN 

机构地区：[1]School of Mechanical and Transportation Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China [2]State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China [3]Department of Electromechain and Automotive Engineering,Liuzhou City Vocational College,Liuzhou 535006,China [4]Chengdu Carbon Co.,Ltd.,Chengdu 610100,China

出　　处：《Friction》2021年第6期1568-1579,共12页摩擦（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.12062002);Guangxi Natural Science Foundation(Grant No.2018GXNSFAA138174);the Science and Technology Development Plan of Liuzhou(No.2018CB10508).

摘　　要：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.

关 键 词：grapheme(G) ionic liquid(IL) synergistic lubrication protective films out-of-plane puckering mechanism 

分 类 号：TH117.22[机械工程—机械设计及理论] TB332[一般工业技术—材料科学与工程]