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合成了3个丁氧基二硫代碳酸-S-乙酸酯新型化合物,采用核磁共振氢谱、核磁共振碳谱、红外光谱、紫外光谱、质谱和元素分析对添加剂分子结构进行了表征.同时采用热失重分析(TGA)对其热稳定性进行了评价,利用四球摩擦磨损试验机考察了其在液体石蜡中的摩擦学行为,并采用光学显微镜、扫描电子显微镜(SEM)和X射线光电子能谱仪(XPS)分析了钢球的磨损表面形态.结果表明:3种添加剂具有比ZDDP更好的抗磨性能和承载能力;其良好的抗磨和极压性能归因于含添加剂的液体石蜡在摩擦过程中发生摩擦化学反应,并生成了主要由FeSO4、FeS2及铁的氧化物等组成的边界膜.
Three novel compounds of butoxy dithiocarbonate-S-acetate were synthesized and their molecular structures were characterized by 1H-NMR, 13C NMR, IR, UV, MS and elemental analysis. The thermogravimetric analysis (TGA) was used to evaluate its thermal stability. The tribological behavior of the sample in liquid paraffin was investigated by four-ball friction and wear tester. The tribological behavior of the sample in liquid paraffin was investigated by optical microscope, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy The wear surface morphology of the steel ball was analyzed by XPS.The results showed that the three kinds of additives had better wear resistance and bearing capacity than ZDDP.The good wear resistance and extreme pressure performance of the three additives were attributed to the liquid paraffin Frictional chemical reaction occurs during the friction process, and a boundary film mainly composed of FeSO4, FeS2 and iron oxides is formed.