磷酸三甲酚酯和亚磷酸二正丁酯添加剂对菜籽油摩擦学性能的影响

The Effect of Tribenyl Phosphate and Dibutyl Phosphite as Additives on the Tribological Behaviors of Rapeseed Oil

利用四球摩擦磨损试验机考察了磷酸三甲酚酯 (TCP)和亚磷酸二正丁酯 (DBP)添加剂对菜籽油摩擦学性能的影响 ,用 X射线光电子能谱和扫描电子显微镜观察分析磨损表面的形貌和元素化学状态 .结果表明 :TCP和 DBP能明显改善菜籽油的抗磨性能并提高其承载能力 ,但减摩效果不好 ;含上述添加剂的菜籽油在摩擦过程中发生摩擦化学变化 ,生成由菜籽油三甘油酯和添加剂摩擦化学反应产物组存的边界润滑膜 。

The effect of tribenyl phosphate (TCP) and dibutyl phosphite (DBP) as additives on the tribological behaviors of rapeseed oil was studied with a four ball machine. The worn surfaces were analyzed by means of X ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). It has been found that both TCP and DBP as additives increase the load carrying capacity and antiwear ability of the rapeseed oil base stock. However, they are ineffective in improving the friction reducing behavior of rapeseed oil. Especially, TCP with higher concentration in the base stock registers considerably increased friction coefficient. XPS analytical results of the worn steel surfaces indicate that tribochemical reactions were involved for steel steel frictional pair lubricated with DBP rapeseed oil and TCP rapeseed oil. This contributes to increase the antiwear ability and load carrying capacity of rapeseed oil.