【作者】 耿明；

【导师】 张朝辉；

【作者基本信息】 北京交通大学 ， 机械工程， 2012， 硕士

【摘要】 随着世界性能源危机的出现和社会对环保的重视,水基润滑液得到迅速的发展；水基润滑液将在工业领域发挥着越来越大的作用。本文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1：1混合配制成水基润滑液(BN-LPE);以LPE水溶液为参照组,对BN-LPE水溶液进行减摩抗磨性能、流变性能及成膜性能分析并做机理分析。利用四球摩擦磨损试验机对润滑液的减摩抗磨性能进行评价分析。分别考虑浓度、载荷和转速对润滑液减摩抗磨性能的影响；利用X射线光电子能谱仪(X-ray photoelectron spectroscopy instrument, XPS)分析出磨痕表面的生成物成分；利用Micro XAM型三维共聚焦表面形貌仪对磨痕表面进行形貌分析。研究发现BN-LPE水溶液具有良好的减摩抗磨性能,其减摩性能随浓度的增加而增强；浓度在15%-35%时,其平均摩擦系数在0.03左右；最低摩擦系数达到0.005左右。分析原因是硼酸三乙醇胺分解后和月桂酸无规共聚醚或其基团反应生成新的硼酸酯,吸附在金属表面形成致密的化学反应膜从而起到有效的减摩抗磨性能。利用Physica MCR301旋转流变仪对BN-LPE水溶液做流变性能分析,得出不同质量浓度和温度下BN-LPE水溶液的动力粘度和剪切率之问的关系曲线。经分析得出BN-LPE水溶液的动力粘度较小,这可能是其减摩性能良好的原因。选择半浸泡的润滑方式,利用NGY-6纳米级润滑膜厚度测量仪对BN-LPE水溶液的成膜性能进行研究,分别考虑浓度、载荷和线速度对成膜性能的影响。研究发现：BN-LPE水溶液的成膜性能在高载荷下较稳定并有一定的承载能力；随着载荷的增大,线速度对成膜性能的影响越小；经分析该润滑液在试验中可能形成了化学吸附膜。本文研究的含氮硼酸酯在聚醚水溶液中的摩擦学性能,经试验表明该水基润滑液具有良好的减摩抗磨性能,具有很好的工业应用前景。图61幅,表7个,参考文献67篇。更多还原

【Abstract】 With the emergence of the world energy crisis and the social attention of the environmental protection, water-based lubricant develops rapidly and will play more and more important role in industrial fields. In this study, the water-based lubricant, the1:1(w/w) solution of lauric acid random copoly-ether (LPE):boric acid triethanolamine (BN) is prepared. Friction-reducing, anti-wear, rheology, film-forming performances and mechanism analysis of BN-LPE solution are tested, taking LPE solutions as reference groups.The friction-reducing and anti-wear performances of lubricants are studied by the four-ball tribometer. The influences of concentration, load and revolution to friction-reducing and anti-wear performances are considered. The products on the grinding surface are analyzed by X-ray photoelectron spectroscopy instrument (XPS). The surface morphology is analysized by Micro XAM type3-D surface profile meter. The results reveal that BN-LPE solution has well friction-reducing and anti-wear properties. Moreover, friction-reducing performance gets better and better with the increasing of concentration. The average friction coefficient is about0.03in solution of15%～35%; the minimum friction coefficient is as low as0.005. BN decomposes and reacts with LPE, producing new type boric acid ester and playing effective friction-reducing and anti-wear properties by adsorbing on the metal surface, forming a compact chemical reaction film.Rheology of BN-LPE aqueous solution is tested by physica MCR301rotating rheometer. Then getting the relation curve between dynamic viscosity and shear rate of different quality concentration and temperature in BN-LPE aqueous solution. The dynamic viscosity of BN-LPE aqueous solution is small, this may be the reason for well friction-reducing performance.Considering the influences of film performance on concentration, load and linear velocity in half soak, BN-LPE aqueous solution is analysized by NGY-6nanoscale lubrication film thickness gauge. Results reveals that BN-LPE solution has well film performance and relatively a certain stable carrying capacity; with the increasing of the load, the linear velocity to the influence on the film performance is small; the lubricating solution in trials may form the chemical adsorption membrane by analyzing.This paper studied the tribological properties of boric acid ester containing nitrogen in polyether aqueous solution, the test showed that the water-based lubricant had well friction-reducing, anti-wear properties and a well industrial application prospect.更多还原