Friction, wear and tribofilm growth of organic friction modifiers (glycerol monooleate and oleamide), anti-wear additive (ZDDP) and binary additive system comprising the organic friction modifiers and ZDDP were studied in polyalphaolefin (PAO) and ester oil. The mechanisms underlying base oil polarity-dependent frictional performance of the OFM and AW additives at high temperature (140 ℃), either singly or in combination, were investigated in the light of chemical composition analysis of the tribofilms post friction measurements using energy dispersive X-ray spectroscopy (EDX), static and dynamic time-of-flight secondary ion mass spectrometry (ToF–SIMS). Depending on the rubbing conditions, the boundary friction coefficient of the binary additive systems was found to be either lower than that of individual additives or to lay between the values for the individual additives. Chemical composition analysis of the tribofilms indicated that the nature of base oil controlled interactions between ZDDP and OFM and consequently adsorption and reactive tribofilm formation in the boundary lubrication layer. Surface roughness and wear scar width measured post tribological tests using 3D surface profiler showed improved wear performance in both PAO and ester-based additive formulations.

在聚α烯烃 (PAO) 和酯油中研究了有机摩擦改进剂（甘油单油酸酯和油酸酰胺）、抗磨添加剂 (ZDDP) 和包含有机摩擦改进剂和 ZDDP 的二元添加剂系统的摩擦、磨损和摩擦膜生长。根据摩擦后摩擦膜的化学成分分析，使用能量色散 X-射线光谱 (EDX)、静态和动态飞行时间二次离子质谱 (ToF-SIMS)。根据摩擦条件，发现二元添加剂系统的边界摩擦系数要么低于单个添加剂的边界摩擦系数，要么介于单个添加剂的值之间。摩擦膜的化学成分分析表明，基础油的性质控制了 ZDDP 和 OFM 之间的相互作用，从而控制了边界润滑层中的吸附和反应性摩擦膜的形成。使用 3D 表面轮廓仪在摩擦学测试后测量的表面粗糙度和磨痕宽度表明，PAO 和酯基添加剂配方的磨损性能都有所提高。