表面修饰Ag2S纳米微粒的热稳定性能及摩擦学行为研究

采用有机化合物表面修饰法在溶液中原位合成了DDP（二烷氧基二硫代磷酸吡啶法）修饰的Ag2S纳米微粒，该纳米核的粒径小，具有与块体Ag2S相同的晶体结构，表面修饰层的存在能够有效抑制Ag2S纳米核的氧化且使其在有机介质和液体石蜡油中具有良好的分散性，采用多种手段分析表征了DDP修饰Ag2S纳米微粒的结构、热稳定性能和摩擦学性能。结果表明，经表面修饰的Ag2S纳米微粒具有较好的减摩抗磨性能，可显著提高基础油的失效负荷，是一种新型的润滑油抗磨添加剂。

Study of Thermally Stable Properties and Tribological Behavior of DDP Surface-modified Ag2S Nanoparticles

DDP surface modified Ag 2S nanoparticles were successfully prepared in situ by chemical method, and the Ag 2S nanoparticles were stable in air The samples have good dispersivity in some organic solvents and liquid paraffin and their tribological behaviors as lubrication oil additives were evaluated on a four ball machine The results show Ag 2S DDP nanoparticles have good antiwear capacity and can effectly improve the failure load of liquid paraffin Contrary to the non surface modified Ag 2S particle, the Ag 2S nanoparticles have better antiwear capacity It is a new antiwear additive in lubricating oil