表面修饰纳米粒子的摩擦学性能  

Tribological Investigation of Surface Modified Nanoparticles as Oil Additive

作　　者：乌学东[1] 王大璞[1] 张信刚[1] 杨生荣[2] 

机构地区：[1]上海交通大学化学化工学院 [2]中国科学院兰州化学物理所固体润滑开放实验室

出　　处：《上海交通大学学报》1999年第2期224-227,共4页Journal of Shanghai Jiaotong University

摘　　要：分别用沉淀法和溶胶－凝胶法合成了二烷基二硫代磷酸（ＤＤＰ）、硬脂酸修饰的ＭｏＳ２、ＴｉＯ２纳米粒子，并用作油品添加剂．通过表面修饰的方法不但解决了油溶性问题，而且由于修饰层控制了粒子的长大和团聚．在四球机上研究其摩擦学性质．试验结果表明，有机基团修饰的纳米粒子具有优良的抗磨、减摩能力，并根据摩擦表面光电子能谱分析提出润滑机理假设．Molybdenum disulfide and titanium dioxide nanoparticles, which are capped with dialkyldithiophosphate (DDP) and stearic acid respectively, were prepared by precipitate method and sol gel method respectively. They were used as oil additives. The modifying layer not only makes the particles oil soluble, but also prevents them from growing and agglomeration. The tribology properties of the surface modified nanoparticles were investigated on a four ball machine. The results show these additives have an excellent load carrying value, anti wear and friction reducing abilities. The lubrication mechanism was also proposed according to the results from the X ray photoelectron spectrum on the friction surface.

关 键 词：纳米粒子 添加剂 润滑油 摩擦学性能 表面修饰 

分 类 号：TH117.22[机械工程—机械设计及理论] TE626.3[石油与天然气工程—油气加工工程]