Oleylamine (hereinafter referred to as OM)-modified CeO₂ nanoparticles were synthesized by a one-pot pyrolysis method. The tribological properties of the as-prepared CeO₂ nanoparticles as the lubricant additive in poly-alpha olefin (PAO) were investigated with a four-ball machine, and their lubricating mechanism was discussed in relation to worn surface analyses by SEM, EDS, and XPS. Findings indicate that these nanoparticles exhibit good dispersibility as well as excellent anti-wear ability in PAO. This is because OM-modified CeO₂ nanoparticles can catalyze the oxidation of metallic Fe to form ferrite oxide-containing tribo-film. Under the condition of ASTM D2266-2001, the same lowest WDS was obtained at the concentration of 0.2 wt% and 1.8 wt%. When the concentration of CeO₂ is 0.2 wt%, a compact catalytic oxidation tribo-film is formed, which has more outstanding long-term anti-wear ability. When 1.8 wt% CeO₂ is added, the tribo-film formed is the combination of catalytic oxidation film and ceria deposition film, which has more significant bearing capacity.

通过一锅法热解法合成了油胺素（以下称为OM）改性的CeO ₂纳米颗粒。用四球机研究了制备的CeO ₂纳米颗粒作为聚α-烯烃（PAO）中润滑油添加剂的摩擦学性能，并讨论了其润滑机理与SEM，EDS和SEM磨损表面分析的关系。 XPS。发现表明这些纳米颗粒在PAO中显示出良好的分散性以及优异的抗磨损能力。这是因为OM改性的CeO ₂纳米粒子可以催化金属铁的氧化，形成含铁氧体的摩擦膜。在ASTM D2266-2001的条件下，以0.2 wt％和1.8 wt％的浓度获得相同的最低WDS。当CeO ₂的浓度为0.2重量％时，形成致密的催化氧化摩擦膜，其具有更优异的长期抗磨能力。当添加1.8wt ％的CeO _2时，形成的摩擦膜是催化氧化膜和二氧化铈沉积膜的组合，其具有更大的承载能力。