环氧大豆油衍生物作为多元醇酯润滑添加剂的性能研究

Tribological Performance of Epoxidized Soybean Oil Derivative in Polyol Ester Base Fluid

以环氧大豆油、酸性磷酸酯、酸性硫代磷酸酯为原料制备2种润滑油添加剂。采用SRV试验机研究2种添加剂在三羟甲基丙烷多元醇酯中的减摩、抗磨性能,利用四球试验机测试其最大无卡咬负荷。实验结果表明,2种添加剂质量分数为1%时能够显著降低体系的摩擦因数与磨损体积,磨损体积最低可降至基础油润滑时的1/10。采用扫描电镜与X射线光电子能谱仪对下试盘磨痕表面的形貌及元素化学状态进行表征,结果表明2种添加剂在摩擦过程中与摩擦副表面发生摩擦化学反应生成了铁的氧化物、硫化物和磷化物从而起到良好的减摩抗磨作用。

Two kinds of lubricating additives were synthesized via the reaction of acidic phosphate and acidic thiophos- phate wifh epoxidized soybean oils respectively.The friction reducing and anti-wear properties of the additives in ester oil were investigated by SRV friction machine.The maximum non seizure load values of the lubricant were carried out using four ball machine.The results show that the additives with mass fraction of 1% in ester can dramatically reduce the friction coefficient and wear volume, and the minimum wear volume is only the 1/10 of that of the base fluid lubrication.The mor- phology and chemical composition of the rubbing surface were analyzed by scanning electron microscope and X-ray photoe- lectron spectroscopy.The result shows that the excellent friction reducing and anti-wear properties of the lubricant additive can be attributed to the formation of iron oxides, iron sulfide, and iron phosphate during the rubbing process.