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中文摘要：
合成了1-乙基-3-辛基咪唑二乙基膦酸盐离子液体,采用傅立叶变换红外光谱仪（FT-IR）和核磁共振谱仪表征了其结构;测定了该化合物的黏度、倾点和密度;在四球试验机和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;采用扫描电子显微镜（SEM）和X射线光电子能谱仪（XPS）分析了钢块磨损表面形貌及化学状态.结果表明：1-乙基-3-辛基咪唑二乙基膦酸盐离子液体低温流动性能和抗腐蚀性能较好;作为润滑剂对钢/钢摩擦副具有优异的减摩抗磨性能,XPS结果显示该离子液体在钢磨损表面形成了含Fe2O3和有机金属复合物等的边界润滑膜,有效地提高了摩擦副的承载能力和抗磨性能.
英文摘要：
The ionic liquid of l-ethyl-3-octylimidazolium diethylphosphonate was prepared and evaluated as a kind of promising lubricant for a steel/steel contact. The friciton and wear behavior of the steel/steel system lubricated with the ionic liquid was investigated on an Optimol SRV oscillating friction and wear tester and MRS-1J four-ball friction and wear tester. The elemental composition and chemical nature of the boundary films generated on the worn steel surface were analyzed with SEM and XPS. The ionic liquid synthesized showed better friction-reducing and antiwear properties and was superior to the PAO in terms of friction-reduction ability and load-carrying capability. 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 Fe2O3 and organic metal complex. This contributed to reduced friction and wear.
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