论文部分内容阅读
采用液相化学还原法在溶液中原位合成了有机化合物表面修饰铜纳米微粒 ,用透射电子显微镜表征了微粒的尺寸、形貌和结构 ,在四球摩擦磨损试验机上考察了其作为液体石蜡添加剂的摩擦学性能 ,并与二烷基二硫代磷酸锌 (ZDDP)进行了对比 .结果表明 :铜纳米微粒添加剂能够显著提高基础油的极压性能 ,同时具有良好的抗磨性能 ,尤其是在高负荷下其性能优于 ZDDP.采用 EPMA和 XPS对铜纳米微粒的极压抗磨机理进行了分析 ,发现在摩擦过程中铜纳米微粒在表面形成沉积膜 ,这种沉积膜与表面修饰层形成的摩擦化学反应膜产生协同作用 ,从而表现出优良的极压抗磨性
The liquid-phase chemical reduction method was used to synthesize the surface-modified copper nanoparticles in situ in solution. The size, morphology and structure of the particles were characterized by transmission electron microscopy. The friction of the particles as liquid paraffin additives The results show that copper nanoparticle additive can significantly improve the extreme pressure performance of base oil and has good anti-wear properties, especially at high load Under EPM and XPS, the extreme pressure and anti-wear mechanism of copper nanoparticles were analyzed and it was found that the copper nanoparticles formed a deposited film on the surface during the rubbing process. The friction between the deposited film and the surface modification layer The chemical reaction membrane produces a synergistic effect, thereby exhibiting excellent extreme pressure and abrasion resistance