混合/流体润滑状态下原位离子液体添加剂的摩擦学性能研究  

Tribological Properties of In-situ Ionic Liquid Additives for Mixed and Hydrodynamic Lubrication

作　　者：杨淑燕 Wong Janet[3] 蔡美荣 周峰[1] YANG Shuyan;WONG Janet;CAI MeIrong;ZHOU Feng(State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Gansu Lanzhou 730000, China;School of Mechanical Engineering, Qingdao Technological University, Shandong Qingdao 266520, China;Department of MechanicaI Engineering, Imperial College London, London SW7 2AZ, UK)

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000 [2]青岛理工大学机械工程学院,山东青岛266520 [3]英国帝国理工学院机械工程系

出　　处：《摩擦学学报》2018年第3期342-348,共7页Tribology

基　　金：国家自然科学基金项目(51775287);中国博士后基金项目(2014M560821)资助~~

摘　　要：本工作重点研究了混合/流体润滑状态下原位离子液体添加剂的摩擦学性能,选用聚乙二醇(PEG-400)作基础油,将双(三氟甲基磺酰)亚胺锂盐(Li TFSI)溶解在PEG中原位合成离子液体.利用微型牵引力试验机测量在室温、60和80℃以及不同滑滚比下摩擦系数随卷吸速度的变化,研究离子液体添加剂的有效性以及离子液体添加剂对PEG流变行为的影响.本研究中将为深入研究离子液体的润滑机理提供一种新的研究手段,对于指导设计新型离子液体润滑材料具有较为重要的意义.This work focused on studying the tribological performance of IL additives in the mixed and hydradynamic lubrication regimes. Polyethylene glycol（PEG-400） was used as the base fluid, ILs were synthesized in situ by dissolving lithium bis（trifluoromethanesulfonyl） imide（LiTFSI） in PEG. Mini Traction Machine was used to measure the friction coefficients with entrainment speeds at room temperature, 60 ℃ and 80 ℃ and at various slide-roll ratios for confirming the effect of IL additives on the tribological properties, and the rheological behavior of PEG was also investigated. This work would provide a new research method for further study of the lubrication mechanism of ionic liquids, which is of great significance for guiding the design of new ionic liquid lubricating materials.

关 键 词：离子液体添加剂 混合/流体润滑 STRIBECK曲线 流变特性 

分 类 号：TH117.2[机械工程—机械设计及理论]