含氮硼酸酯在聚醚水溶液中的成膜性能

Film-forming Property of Polyether Aqueous Solutions with Nitrogenous Boric Acid Ester

含氮硼酸酯和聚醚添加剂都是性能良好的水基润滑添加剂,两种添加剂的混合水基润滑液的成膜性能尚未研究。将月桂酸无规共聚醚(Lauric acid random copoly-ether,LPE)和硼酸三乙醇胺(Boric acid triethanolamine,BN)按质量比为1∶1混合后得到无色透明的水基润滑液,选取半浸泡的润滑方式,利用纳米级润滑膜厚度测量仪(NGY-6型)进行膜厚测量并做机理分析,分别从浓度、载荷和线速度三方面研究水基润滑液的成膜性能。结果表明该水基润滑液(浓度5%,载荷100 N)膜厚度基本稳定在5.5 nm,承受0.86 GPa的载荷;水基润滑液的成膜性能受浓度、载荷和线速度综合影响,随着载荷的增大,线速度对成膜性能的影响越小。经分析该水基润滑液在试验中形成化学吸附膜。纳米级厚度润滑薄膜的成膜性能研究将在精密仪器领域有很大的应用。

Nitrogen contained boric acid ester and polyether additive are all well-performed water-based lubricant additives. The film forming properties of the two additives mixed water-based lubricating fluid is not studied. The transparent aqueous solution is the 1 ： 1 （m/m） mixture of laurie acid random copoly-ether （LPE） and boric acid triethanolamine （BN）. The effect of concentration, load and linear speed on the film-forming property of the mixed polyether aqueous solution are analyzed by the nanometer scale lubrication film thickness gauge （NGY-6）. Results of the tests show that film thickness of the water-based lubricant （5%, v/v, load 100 N） is 5.5 nm, and it can bear the load of 0.86 GPa. The film-forming property of water-based lubricants is affected by the concentration, load and linear speed. With the increase in the load, the effect of linear speed on film-forming property decreases. Meanwhile, in the experiments, the chemical adsorption film is formed on the friction pair surfaces. The nanoscale film-forming properties of the lubricating film can be widely applied in the field of precision instalments.