磺酸醇胺离子液体作为水润滑添加剂的摩擦学机制研究  

Tribological Mechanism of Sulfonic Alkanolamine Ionic Liquid as Water Lubricating Additive

作　　者：董瑞 危得全 于强亮[1] 张嘉莹 王新刚 蔡美荣[1,3] 周峰 刘维民[1] DONG Rui;WEI Dequan;YU Qiangliang;ZHANG Jiaying;WANG Xingang;CAI Meirong;ZHOU Feng;LIU Weimin(State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Gansu Lanzhou 730000 China;University of Chinese Academy of Sciences,Beijing 100049 China;Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing,Shandong Yantai 264006,China)

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]中国科学院大学,北京100049 [3]烟台先进材料与绿色制造山东省实验室,山东烟台264006

出　　处：《摩擦学学报》2022年第3期482-492,共11页Tribology

基　　金：国家重点研发计划(2021YFA0716304);国家自然科学基金项目(21972153,U21A20280);载人航天预研项目(040101);中国科学院青年创新促进会(2018454);中科院兰州化学物理研究所青年科技工作者协同创新联盟合作基金(YJGL20-01)资助。

摘　　要：合成了不含卤素的磺酸醇胺离子液体(S-IL),并将其作为水基润滑添加剂进行研究.与商用的水基润滑添加剂聚合蓖麻油酸酯(L4)进行对比,共同考察了他们在不同金属摩擦对偶上的摩擦学性能.通过对磨斑表面的XPS测试探究了S-IL分别在钢/钢、钢/铜、钢/铝、钢/钛和钢/镁摩擦副上的润滑机理.结果表明:所合成的磺酸醇胺离子液体在水体系中具有良好的溶解性,同时表现出一定的抗腐蚀性能.相比于商用水基添加剂,S-IL具有优异的减摩作用和极压性能,这主要归因于离子液体分子结构中极性基团(-SOO-)在金属摩擦副表面的物理/化学吸附,以及其分子结构中含有的活性元素S和N与金属摩擦副基底发生摩擦化学反应所形成的摩擦化学反应膜.In this work,dodecyl benzenesulfonic acid and triethanolamine were applied to synthesize a kind of halogenfree sulfonic alcohol amine ionic liquid(S-IL)as water lubricating additive,and a commercial ionic liquid(tetra ricinolein acid ester,L4)was chosen as reference.Nuclear Magnetic Resonance showed that as-synthesized S-IL additive had a definite molecular structure and high purity.Subsequently,solubility in water was considered for S-IL compared to L4,the result revealed that the former was superior to the later.The reason was that the ionic configuration of S-IL can electrolyze out cations and anions in water,and the cationic triethanolamine species can produce hydrogen bonds with water molecules to promote the dissolution.In contrast,L4 was a neutral molecule with the longer alkane chains that generated the hydrophobicity.The anti-corrosive durability of additives was the most concerned issue in water lubricating system.The electrochemical corrosive tests were used to inspect the corrosion resistances of S-IL,L4and pure water,with the assistance of iron plates and copper plates serving as the working electrode,respectively.Noted that no matter iron electrode or copper one,S-IL enabled the more excellent corrosion resistance than other two references,which implied that S-IL can efficiently form the protective film on the metal interface.Tribological tests were performed to evaluate the lubricating performances of S-IL as additive compared to L4 and pure water in ball-ondisk configurations on steel-steel friction pairs.Although both S-IL and L4 presented the similar sliding status and approximate friction coefficient,relative to that of pure water,S-IL additive can suffer the much higher load pressure up to 900 N than extreme pressure load of L4.The load patience was further verified on four balls tester on such extreme load,with the smooth and steady friction coefficient observed across the running time.Next,the different metal plates(Cu,Al,Ti and Mg)sliding against steel ball were employed to explore the avai

关 键 词：离子液体 添加剂 水基润滑 金属摩擦副 摩擦学机制 

分 类 号：TH117.22[机械工程—机械设计及理论]