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制备了氧化三辛基膦表面修饰的油溶性ZrO2纳米微粒,用透射电镜(TEM)、X-射线衍射仪、红外光谱仪对其进行表征,研究了其作为多烷基环戊烷(MACs)添加剂的摩擦学性能及润滑机理.结果表明:ZrO2纳米微粒粒径大约为7～8 nm,分布比较均匀,无明显团聚,在非极性溶剂中能很好地溶解和稳定分散;作为MACs添加剂,在摩擦过程中,无机ZrO2纳米微粒以沉积膜形式沉积在摩擦副表面,有机修饰剂中的活性P元素在摩擦副表面发生了化学反应,形成了FePO4极压润滑膜,ZrO2沉积膜和FePO4极压润滑膜的协同作用起到了良好的抗磨和抗极压作用.
The oil-soluble ZrO2 nanoparticles modified with trioctylphosphine oxide were prepared and characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and infrared spectroscopy. The tribological properties and lubrication mechanism of ZrO2 nanoparticles were studied.The results show that the size of ZrO2 nanoparticles is about 7-8 nm with uniform distribution and no agglomeration and can dissolve and disperse well in nonpolar solvents.As a MACs additive, In the process of friction, the inorganic ZrO2 nanoparticles deposited on the surface of the friction pair in the form of deposited film. The active P element in the organic modifier chemically reacted on the surface of the friction pair to form the extreme pressure lubrication film of FePO4, the ZrO2 deposition film and the FePO4 electrode The synergistic effect of pressure lubrication film has played a good anti-wear and anti-extreme pressure effect.