The impacts of two fatty acidic diethanolamide borates, viz. oleic diethanolamide borate and lauric diethanolamide borate, as additives on biodegradability and lubricity of an unreadily biodegradable mineral lubricating oil were studied. The biodegradabilities of neat lubricating oil and its formulations with the borate esters were evaluated on a biodegradation tester. Furthermore, the anti-wear and friction-reducing abilities of neat oil and the formulated oils were determined on a four-ball tribotester, respectively. The tribochemical species of the worn surfaces were analyzed by an X-ray photoelectron spectroscope (XPS). The results indicated that oleic diethanolamide borate and lauric diethanolamide borate markedly enhanced biodegradability and lubricity of the lubricating oil. The improvement of anti-wear and friction-reducing abilities of the mineral oil by the borates was mainly ascribed to the formation of a composite boundary lubrication film thanks to the adsorption and tribochemical reactions of the borates on the friction surfaces.
两种
脂肪酸二
乙醇酰胺硼酸盐的影响,即。研究了
油酸二
乙醇酰胺硼酸盐和
月桂酸二
乙醇酰胺硼酸盐作为
添加剂对难
生物降解矿物润滑油的
生物降解性和润滑性的影响。在
生物降解测试仪上评价纯润滑油及其
硼酸酯配方的
生物降解性。此外,还分别在四球摩擦测试仪上测定了纯油和配制油的抗磨损和减摩能力。通过 X 射线光电子能谱 (X
PS) 分析磨损表面的摩擦
化学物质。结果表明,
油酸二
乙醇酰胺硼酸盐和
月桂酸二
乙醇酰胺硼酸盐显着增强了润滑油的
生物降解性和润滑性。
硼酸盐对矿物油抗磨和减摩能力的提高主要归因于
硼酸盐在摩擦表面的吸附和摩擦
化学反应,形成复合边界润滑膜。