含硫磷酸官能团硼酸酯的制备及摩擦学性能研究

PREPARATION AND TRIBOLOGICAL STUDY OF A BORATE ESTER CONTAINING THIOPHOSPHORIC ACID GROUP

摘要:

以正丁醇、五硫化二磷、二乙醇胺、硼酸等为原料，制备了一种含硫磷酸官能团硼酸酯润滑油添加剂(简称SPNB)，采用元素分析和红外光谱对所得产物的结构组成进行了表征；研究了它在基础油大庆加氢矿物油HVI H200中的溶解性和水解稳定性；在四球摩擦磨损试验机上系统考察了添加剂SPNB在基础油中不同含量、不同载荷下的摩擦学以及抑制油品温升等性能；利用SEM/EDS观察分析了钢球磨痕表面。结果表明，添加剂SPNB具有良好的油溶性和水解稳定性，当SPNB加入量(w)为0.5%时，润滑油的磨斑直径和摩擦系数分别比基础油降低24%和20%，pB值和pD值分别提高60%和26%，同时还对抑制油品温升也起到了一定作用。

Abstract:

A kind of borate (Titled as SPNB) containing thiophosphoric acid functional group as lubricating oil additive was synthesized by n-butanol, phosphorus pentasulfide, diethanolamine, boric acid etc and its chemical structure was characterized using elemental analysis and infrared spectroscopy. The soluble stability and hydrolytic stability of the SPNB were studied in hydrogenated oil HVI H200, and its tribological and performances of suppression oil temperature rising in base oil with different mass fractions and loads were evaluated on a four-ball tester, then the worn steel surface was observed and examined by means of SEM/EDS. Results showed that the SPNB has a good soluble stability and good hydrolytic stability in the base oil. When 0.5%SPNB was added into the base oil, the wear scar diameter(WSD) of steel ball and friction coefiicient(μ) could be reduced by 24% and 20%, respectively, the pB and pD values could be incresed by 60% and 26%, respectively, which compared with the base oil, meanwhile it is good to supress oil temperature rising.