含磷抗磨添加剂在三羟甲基丙烷油酸酯中的性能研究

Properties Study of Phosphorus Containing Anti-wear Additives in Trimethylolpropane Trioleate(TMPT)

三羟甲基丙烷三油酸酯(TMPT)作为抗燃液压油、可生物降解液压油、金属加工用油等在多个工业领域获得应用。文章采用四球试验机、高压差示扫描量热仪(PDSC)以及液压油水解安定性测定仪分别研究了磷酸三甲酚酯(TCP)、磷酸酯胺盐(Irgalube 349)、二烷基二硫代磷酸锌(ZDDP)三种含磷抗磨添加剂在三羟甲基丙烷油酸酯中的摩擦学性能、氧化安定性以及水解性能。摩擦试验表明:磷酸酯胺盐对三羟甲基丙烷油酸酯摩擦学性能的改善效果明显优于ZDDP与TCP。PDSC氧化试验表明三种添加剂对TMPT的抗氧化性能均无显著的提高作用,TCP与Irgalube 349的存在不会对胺类抗氧剂的抗氧效果产生影响,ZDDP则与丁基辛基二苯胺L57表现出协同抗氧作用。水解试验则表明磷酸酯胺盐与ZDDP会加速TMPT的水解。此外,还对添加剂在TMPT中的作用机理进行了讨论。

Trimethylolpropane trioleate（TMPT）has been widely used for fire-resistant hydraulic oil,biodegradable hydraulic oil and metal working fluids in modern industry.In this work,four ball machine,pressure differential scanning calorimetry（PDSC）,and hydrolytic stability test machine of hydraulic fluid were utilized to evaluate the tribological performance,oxidation stability,as well as hydrolysis performance of tritolyl phosphate（TCP）,amine phosphate（Irgalube 349）,and zinc dialkyl dithiophosphate（ZDDP）in TMPT.Tribological test results showed that Irgalube 349 exhibits excellent friction-reducing and anti-wear performance in TMPT.It was also found that there is little effect on the oxidation stability of base oil for these additives,and TCP and Irgalube 349 have no negative effect on the anti-oxidation behavior of L57.However,ZDDP shows synergistic antioxidant effect with L57.The hydrolytic test results showed that the addition of Irgalube 349 and ZDDP will accelerate the hydrolysis speed of the TMPT.Furthermore,the action mechanisms of the additive in TMPT were also discussed.