Environmental-friendly polytetrafluoroethylene@silica (PTFE@SiO₂) composite particles characterized by core-shell structure were synthesized. The tests demonstrated that the synthesized particles had good dispersibility and stability in poly-α-olefin 6 (PAO6) and its corrosion resistance was better than zinc dialkyl dithiophosphate (ZDDP). The extreme pressure (EP) and tribological tests evidenced that PTFE@SiO₂ particles possessed superior EP and anti-wear (AW) properties, which could enhance the wear-resistance and load-bearing capacities of PAO6 in high efficiency, whereas the tribological performance was greatly affected by the load. Besides, EP tests for different kinds of base oils demonstrated that the addition of PTFE@SiO₂ particles could significantly improve the bearing capacity of these base oils, and the corresponding performances were also better than ZDDP. Scanning electron microscope and X-ray photoelectron spectrum characterizations proved that there was an organic-inorganic co-extruded transfer film generated on the worn surface, and a possible lubrication mechanism on this basis was also put forward.

合成了具有核-壳结构特征的环保型聚四氟乙烯@二氧化硅（PTFE @ SiO ₂）复合颗粒。试验表明，所合成的颗粒在聚α-烯烃6（PAO6）中具有良好的分散性和稳定性，其耐腐蚀性优于二烷基二硫代磷酸锌（ZDDP）。极压（EP）和摩擦学测试表明PTFE @ SiO ₂颗粒具有优异的EP和抗磨（AW）性能，可以高效提高PAO6的耐磨性和承载能力，而摩擦学性能受负载的影响很大。此外，EP对不同种类基础油的测试表明，PTFE @ SiO _2的添加颗粒可以显着提高这些基础油的承载能力，相应的性能也优于ZDDP。扫描电子显微镜和X射线光电子能谱表征证明在磨损表面产生了有机-无机共挤出转移膜，并在此基础上提出了可能的润滑机理。