噻吩含氮衍生物在菜籽油中的摩擦学行为

利用四球摩擦磨损试验机考察了所合成添加剂S-(2H-噻吩－2－基）甲基]N、N－二烷基二硫代氨基甲酸酯和噻吩对菜籽油摩擦学性能的影响以及添加剂结构和性能的关系，用X射线光电子能谱仪和扫描电子显微镜观察分析了磨损表面的形貌和元素化学状态。结果表明：噻吩／菜籽油润滑剂对钢－钢摩擦副有增摩促磨作用，而噻吩氨基甲酸酯衍生物添加剂在适当浓度下可改善菜籽油的减摩抗磨性能和承载能力；含上述添加剂的菜籽油在摩擦过程中发生摩擦化学反应，生成由菜籽油甘油酯和添加剂摩擦化学反应产物组成的边界润滑膜，从而改善菜籽油的摩擦学性能。

Friction and Wear Behavior of N-containing Thiophen Derivatives as Additives in Rapeseed Oil

S (2H thiophen 2 yl)methyl N, N dialkyl] dithiocarbamates were prepared in laboratory. The extreme pressure, antiwear and friction reducing properties of rapeseed oil with thiophen and S (2H thiophen 2 yl)methyl N,N dialkyl] dithiocarbamates as additives and the relationship between the additive structure and triobolgical properties were examined with a four ball machine. The worn surfaces of the steel ball were analyzed by means of X ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). It has been found that thiophen as additive in rapeseed oil worsens the antiwera and extreme pressure properties, while S (2H thiophen 2 yl)methyl N,N dialkyl] dithiocarbamates at proper concentrations are effective in improving the antiwear, friction reducing behavior and load carrying capacity of rapeseed oil. The XPS analytical results of the worn steel surfaces indicate that tribochemical reactions were involved for steel steel frictional pair lubricated with rapeseed oil containing S (2H thiophen 2 yl)methyl N,N dialkyl] dithiocarbamates as the additives, with the formation of a boundary lubricating and protecting film composed of triester of rapeseed oil and tribochemical reaction products of the lubricants. This contributes to improve the triblogical properties of the rapeseed oil base stock.