1-甲基-3-丁基咪唑六氟磷酸盐离子液的摩擦学性能  

Tribological Behavior of the Ionic Liquid of 1-Methyl-3-Butyl-Imidazolium Hexafluorophosphate as a Lubricant

作　　者：王海忠[1] 叶承峰[1] 刘维民[1] 

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

出　　处：《摩擦学学报》2003年第1期38-41,共4页Tribology

基　　金：国家杰出青年基金资助项目 (5 982 5 116)

摘　　要：合成了 1-甲基 - 3-丁基咪唑六氟磷酸盐离子液体 ,采用核磁共振氢谱仪和傅立叶转换红外光谱仪表征了其结构 ;测定了该化合物的粘度、倾点和密度 ;在 SRV摩擦磨损试验机上评价了其作为润滑剂对钢 /钢体系的润滑作用 ;采用 X射线光电子能谱仪和扫描电子显微镜分析了钢磨损表面形貌及化学状态 ,以考察其润滑机理 .结果表明 :1-甲基 -3-丁基咪唑六氟磷酸盐离子液低温流动性能好 ,作为润滑剂对钢 /钢摩擦副具有优异的润滑作用 ,摩擦系数极低 ,且抗磨性能优良 .这是由于该离子液体在钢磨损表面形成含 Fe PO4 和 Fe F2 等物质的边界润滑膜 。The ionic liquid of 1 methyl 3 butylimidazolium hexafluorophosphate was prepared and evaluated as a kind of promising lubricant for a steel/steel contact. Thus the friciton and wear behavior of the steel/steel system lubricated with the ionic liquid was examined on an Optimol SRV oscillating friction and wear tester, by comparing with that under the lubrication of phosphazene X 1P and perfluoropolyether as the lubricants. The elemental composition and chemical nature of the boundary films generated on the steel worn surface were analyzed with a scanning electron microscope equipped with a Kevex energy dispersive X ray analyzer attachment and an X ray photoelectron spectroscope. As the results, the synthetic ionic liquid showed excellent friction reducing and antiwear behavior and was superior to the phosphazene X 1P and perfluoropolyether in terms of friction reduction ability and load carrying capacity. A boundary lubricating film of ionic liquid was formed on the steel worn surface by physical adsorption, while chemical reaction of the ionic liquid with the steel surface was involved at an elevated temperature to generate a boundary lubricating film containing FePO 4 and FeF 2. This contributed to reducing the friction and wear.

关 键 词：离子液 1-甲基-3-丁基咪唑六氟磷酸盐 润滑剂 摩擦学性能 

分 类 号：TH117.22[机械工程—机械设计及理论]