磷氮化改性菜籽油润滑添加剂的制备及其摩擦学性能

Synthesis and Tribological Behavior of Phosphorous-nitrogen-incorporated Rapeseed Oil as Lubricating Additive

在菜籽油中引入磷和氮 ,合成了 2种新型磷氮化改性菜籽油添加剂 ,并利用红外光谱对其主要官能团进行了鉴定 ,利用四球试验机考察其在菜籽油中的抗磨性能与极压性能 ,用扫描电子显微镜观察分析磨斑表面的形貌 ,同时通过对磨痕进行 X射线光电子能谱分析 ,探讨了磷氮化改性菜籽油润滑添加剂的极压抗磨作用机理 .结果表明 :两类磷氮化改性菜籽油添加剂能明显改善菜籽油的抗磨和减摩性能 ;其润滑作用机理是由于长链菜籽油分子的载体作用、磷和氮的高反应活性以及三者的协同作用与摩擦金属表面形成了一层高强度的吸附膜和 (或 )

Two types of phosphorous-nitrogen-incorporated rapeseed oil were synthesized and characterized by infrared spectrometry. Their tribological properties as additives in rapeseed oil and mineral oil were tested. The friction-reducing behavior of the additives in rapeseed oil was examined on an MM-200 friction and wear tester. The morphologies of the worn steel surfaces were analyzed by scanning electron microscopy. It is shown that the two types of modified rapeseed oil as additives can obviously increase the load-carrying capacity, antiwear and friction-reducing abilities of rapeseed oil. It is supposed that a high strength adsorption film and/or tribochemical reaction film on the rubbing steel surfaces accounts for the improved friction and wear behavior under the lubrication of rapeseed oil containing the additives. The molecules of the rapeseed oil base-stock with a long carbon chain help to strengthen the adsorption of the additive molecules on the steel surface, together with the high reaction activities of the P and N in the additive molecules shows a synergism to improve the friction-reducing and antiwear behavior of the lubricant.