新型S-N型1,3,4-噻二唑-2-硫酮衍生物对菜籽油摩擦磨损性能的影响

Tribological Study of a Novel S-N style 1,3,4-thiadiazole-2-thione Derivative in Rapeseed Oil

合成了一种新型S-N型1,3,4-噻二唑-2-硫酮衍生物5-十二烷基二硫代-3-苯基-1,3,4-噻二唑-2-硫酮(DPTT),采用元素分析和红外光谱技术对化合物结构进行表征,用热重分析仪考察其热稳定性,在四球摩擦磨损试验机上评价其作为菜籽油(RSO)添加剂的摩擦磨损性能,采用扫描电子显微镜和X射线光电子能谱仪观察分析钢球磨损表面形貌及其元素的化学形态.结果表明:所合成的化合物具有较高的热稳定性,能够有效地提高菜籽油的抗磨减摩性能;在摩擦过程中,钢球磨损表面形成了一层含硫化亚铁、二硫化亚铁和硫酸铁、含氮金属配合物、氮氧化合物和氮的有机化合物复合膜,从而使添加剂具有良好减摩抗磨性能.

A novel 1,3,4-thiadiazole-2-thione derivative DPTT was synthesized and confirmed by elemental analyses and IR. The thermal properties of DPTT was investigated by thermogravimetric analyzer, and the tribological properties of DPTT as additive in rapeseed oil was examined by using four-ball tester. Worn surface morphology and element chemical composition of rubbing film was analyzed by means of scanning electron microscopy and X-ray photoelectron spectroscopy. The result indicates that DPTT possed good thermal stability, this novel compound as an additive in the rapeseed oil was able to obviously decrease the wear rate and friction coefficient, the additives reacted with metal surface to form a film containing FeS, FeS2 and FeSO4, and nitrogen metal complex, nitrogen oxides and organic nitrogen, all these compound contributed to the improved tribological properties of the rapeseed oil.