【摘要】 在低温常压下合成了一种油溶性极压添加剂二正辛烷基多硫化物(DOPS);通过四球机考察了DOPS和传统添加剂磷酸三甲酚酯(TCP)间的复配摩擦学性能;用X射线光电子能谱议和扫描电子显微镜分析了钢球磨损表面形貌和元素化学状态。结果显示在TCP、DOPS添加剂及DOPS/TCP复合添加剂的存在下菜籽油(RSO)的承载能力均得到大幅提高;DOPS/TCP质量比为1∶9时的复合添加剂使基础油的摩擦学性能得到了显著提高,表现出了良好的协同效应。在摩擦过程中,添加剂和金属表面发生化学反应,所生成的含FeS2、FeSO4和Fe2(PO4)3边界润滑膜起到了耐极压抗磨减摩作用。更多还原

【Abstract】 A potential good oil-soluble extreme pressure additive—di-n-octyl polysulfide（DOPS） was synthesized at low temperature and under normal atmosphere,its synergistic tribological effect with a traditional additive,tricresyl phosphate（TCP）,in rape seed oil was examined by using four-ball machines.X-ray photoelectron spectroscopy（XPS） and scanning electron microscopy（SEM） were used to investigate the worn surfaces of the steel ball.The results show that the load-carrying capacity of the vegetable oil can be improved greatly by the presence of the TCP and/or DOPS;the synergistic system shows a good synergistic effect in improving the tribological performance of vegetable oil when DOPS/TCP mass ratios is 1∶9.The addictives reacted with steel interface and generated FeS₂,FeSO₄ and Fe₂（PO₄）₃ boundary lubrication films,which improves the tribological behaviors of vegetable oil.更多还原