Synthesis and Tribological Behaviour of 1,3,4-Thiadiazole Schiff Base Derivatives as Multifunctional Lubricant Additives

Six new 1,3,4-thiadiazole Schiff base derivatives were synthesized and characterized by IR spectroscopy and ~1H NMR spectrometry, and their anti-corrosion properties and thermal stability were investigated via thermogravimetric analysis(TGA) and copper strip corrosion test. The tribological behavior of the said Schiff base derivatives was evaluated on an Optimol SRV~?4 oscillating reciprocating friction and wear tester. The worn surfaces of the steel discs were investigated using a scanning electron microscope(SEM) and energy dispersive X-ray spectrometer(EDS). The test results indicated that these thiadiazole Schiff base derivatives possessed favourable thermal stability, corrosion inhibiting ability and the capability of improving the tribological characteristic of the base oil effectively. It is assumed that the adsorbed additives probably reacted with the steel surfaces during the friction process, resulting in the formation of a protective film composed of sulphates, sulphides and organic nitrogen compounds.     

三类润滑油极压抗磨添加剂的研究现状及发展预测

润滑油极压抗磨添加剂是一类重要的润滑油添加剂,润滑油极压抗磨添加剂的不断发展推动了润滑油添加剂质量的改善。文章简要地概括了含氮杂环化合物及其衍生物、纳米粒子与离子液体三类润滑油极压抗磨添加剂的发展现状和研究动态,对三类润滑油极压抗磨添加剂的优缺点进行了比较与总结,并对其各自的作用机理进行了分析和归纳。指出:各类润滑油添加剂的复配研究是润滑油添加剂的研究热点,认为新型环保多功能型极压抗磨添加剂将是今后添加剂发展的主要方向。