新型含硫、氮的苯基硼酸酯润滑油添加剂的制备与性能

Preparation and Tribological Properties of a Novel Phenylboronate Lubricating Additive Containing S and N

在催化剂作用下,通过醚化反应合成1–巯基苯并噻唑–2–辛基–3–苯基硼酸酯(MOPB)作为润滑油添加剂.以四球磨损试验机为测试工具分别测试MOPB的摩擦学性能,当基础油(PAO)中的MOPB添加量为2.5%时,基础油的承载能力和抗磨性能分别提高了131.8%和24.7%.运用扫描电子显微镜(SEM)和能谱仪(EDS)分别分析测试过程中的钢球磨损表面形貌和磨斑表面元素组成,通过水解稳定性实验测试MOPB的水解稳定性.结果表明:MOPB具有优良的水解稳定性,同时,MOPB作为润滑油添加剂与二烷基二硫代磷酸锌(ZDDP)相比具有较好的摩擦学性能.SEM和EDS的测试结果表明,在摩擦环境下,MOPB能有效减轻钢球摩擦副表面的擦伤和磨损.

1-Mercaprobenzothiazole-2-Octyl-3-Phenylborate(MOPB)was synthesized through etherification reaction in the presence of catalyst.The tribological properties of MOPB as a lubricant additive in basestock were evaluated using a four-ball machine. When 2.5% MOPB was added into the base oil, the P B value was increased by 131.8%, and the wear-scar diameter was reduced by 24.7%. The surface topography and elements of the abra ded steel were studied with scanning electron mi-croscope(SEM)and energy dispersive spectrometer(EDS), respectively. The results show that the MOPB possesses good hydrolytic stability.In addition, MOPB as a lubricating oil additive, compared with zinc dialkyl dithiophosphates(noted as ZDDP), exhibits excellent tribological properties. SEM and EDS analyses show that MOPB can more effectively alleviate the scratch and abrasion of the surface of the steel balls.