中文摘要：

合成了1-甲基-3-己基咪唑四氟硼酸盐离子液体，并以此为反应介质通过有机金属化合物热分解法制备出CdS纳米微粒，采用X射线粉末衍射仪和透射电子显微镜对CdS纳米微粒的结构和形貌进行表征，在四球摩擦磨损试验机上考察了含CdS纳米微粒离子液体的摩擦磨损行为．结果表明：所制备的CdS纳米微粒具有六方相结构，粒径均一，约为15nm；含CdS纳米微粒离子液体的减摩抗磨性能明显优于纯离子液体；CdS纳米微粒以滚动／滑动方式起到了减摩抗磨作用，同时可以加速离子液体中阴离子的分解，促进FeF2和FeF3的形成，使复合体系的减摩抗磨性能有所提高．

英文摘要：

CdS nanoparticles were prepared in a room temperature ionic liquid, 1-methyl-3-hexyl-imidazolium tetrafluoroborate. X-ray powder diffraction and transmission electron microscopy were used to characterize the structure of the CdS nanoparticles. The results indicate that the average diameter of the nanoparticles is about 15 nm. The nanoparticles have hexagonal structure. The tribological behaviors of 1-methyl-3-hexyl-imidazolium tetrafluoroborate ionic liquid and its complex system which containing CdS nanoparticles were studied on a four-ball machine. The results indicate that the ionic liquid containing CdS nanoparticles shows better tribological behavior than pure ionic liquid. CdS nanoparticles increased the decomposition of anion existing in ionic liquid, and their rolling/sliding reduced the friction.