质子型离子液体水基润滑液摩擦学性能研究  

Lubricating Properties of the Protic Ionic Liquids as the Water-Based Lubricating Additives

作　　者：张建文 张朝辉[1] 刘志杭 ZHANG Jianwen;ZHANG Chaohui;LIU Zhihang(School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学机械与电子控制工程学院

出　　处：《摩擦学学报》2019年第5期628-634,共7页Tribology

摘　　要：配置了不同质量分数的质子型离子液体二乙醇胺月桂酸(Bis[(2-hydroxyethyl)ammonium]lauric,BOEAL)水溶液,使用MRS-10A摩擦试验仪、NGY-6型纳米膜厚测量仪、接触角测量仪,对BOEAL水溶液的减摩抗磨性能、极压性能、成膜性能和润湿性等进行试验研究,并用3D共聚焦表面形貌仪和XPS对摩擦磨损机制进行了分析.结果表明:质量分数为5%的BOEAL水溶液最大无卡咬负荷在834~883 N之间,相比纯水(98 N)有较大的提高,即BOEAL可作为水基润滑液的极压添加剂.BOEAL的加入显著提高了纯水的成膜能力以及在钢-钢摩擦副表面的润湿性能.分析原因是BOEAL中的极性基团可以在金属表面形成致密的化学吸附膜或物理吸附膜,从而使得金属摩擦副的摩擦系数降低,抗磨效果提高,同时由于BOEAL分子极性较强,低质量分数的BOEAL水溶液在不锈钢表面就表现出良好的摩擦学性能.Protic ionic liquid(Bis[(2-hydroxyethyl)ammonium]lauric,BOEAL)aqueous solutions were prepared.Friction-reducing and anti-wear properties,extreme pressure properties,film forming properties and wettability of BOEAL aqueous solutions were tested on the MRS-10 A friction tester,NGY-6 nanometer and Contact angle tester.The friction and wear mechanism were analyzed by 3D surface profiler and X-ray photoelectron spectrometer.The results show that low concentration BOEAL aqueous solution had excellent extreme pressure performance,and the non-seizure value(PB)of the BOEAL aqueous solution(5%)was between 834 N and 883 N.Compared to that of pure water(98 N),the BOEAL aqueous solution had good extreme pressure performance.The film forming ability of pure water and the wettability of steel-steel friction pair surface were remarkably improved by BOEAL.The reason was that the polar groups of BOEAL can form a dense chemical or physical adsorption film on the metal surface,which reduced the friction coefficient and improved the anti-wear properties.Because of the saturated adsorption of the polar molecules,low concentration of BOEAL aqueous solutions had good tribological properties.

关 键 词：二乙醇胺月桂酸 水基润滑液 减摩抗磨 成膜特性 润湿性 

分 类 号：TH117.1[机械工程—机械设计及理论] TH117.2