文献类型：期刊文献

英文题名：A molecular dynamics study on the synergistic lubrication mechanisms of graphene/water-based lubricant systems

作者：Li, Chenjie[1];Tang, Weiwei[2];Tang, Xiu-Zhi[3];Yang, Linyan[4];Bai, Lichun[1]

机构：[1]Cent South Univ, Sch Traff & Transportat Engn, Key Lab Traff Safety Track, Minist Educ, Changsha 410075, Peoples R China;[2]Panzhihua Univ, Sch Biol & Chem Engn, Panzhihua 617000, Peoples R China;[3]Cent South Univ, Sch Aeronaut & Astronaut, Hunan Key Lab Adv Fibers & Composites, Changsha 410083, Peoples R China;[4]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：167

外文期刊名：TRIBOLOGY INTERNATIONAL

收录：;EI(收录号：20215111354120);WOS:【SCI-EXPANDED(收录号:WOS:000733011100001)】；

基金：We acknowledge financial support of the National Natural Science Foundation of China (51905548), and the open project of State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University (SV2019-KF-24). The simulations in this work are supported by the High Performance Computing Center of Central South University.

语种：英文

外文关键词：Graphene; Water-based lubricant; Synergistic lubrication; Molecular dynamics simulation

摘要：Water-based lubricants with graphene have excellent lubrication behaviors, but the synergistic mechanism involving the activities of both water and graphene isblue still unclear. This work investigates such mechanism by considering the effect of different factors such as the number of water molecules, loading, surface roughness and sliding velocity via molecular dynamics simulation. It is found that the friction reduction by water-based lubricants is due to the enhanced isolation between friction pairs by the graphene presence and the improvement of water replenishment. The synergistic lubrication mechanism works as that the water molecules may protect the structural integrity of graphene by inducing its movement to release lateral stresses and the graphene can enhance the movement of water molecules and promote their rolling like bearings.