【摘要】 以合成的2-辛硫基-5-巯基-1,3,4-噻二唑为配体,在醇-水体系中制备了2-辛硫基-5-巯基-1,3,4-噻二唑Ag(Ⅰ)修饰的钼硅酸盐纳米颗粒,以透射电子显微镜(TEM)、扫描电子显微镜(SEM)、元素分析仪(EA)、傅立叶变换红外光谱仪(FT-IR)、热分析仪(TG-DTA)等测试手段对此纳米颗粒的形貌、组成和结构进行了表征,并在机械式四球长时抗磨损试验机上考察了其摩擦学性能。分散性实验结果表明该纳米颗粒在有机溶剂中良好分散,红外光谱表明所合成的纳米颗粒具有杂多酸Keggin骨架结构无机核,透射电镜分析表明颗粒平均粒径约为20nm,热分析显示分解温度范围为220~370℃,作为新型纳米润滑油添加剂,测试条件为负荷300N,时间30min,转速1450r/min条件下,在最佳添加质量分数为0.05%时,使磨斑直径减小43.4%,摩擦系数减小23.6%。更多还原

【Abstract】 The heteropoly siliconmolybdate nanoparticles modified with 2-octathio-5-mercapto-1,3,4-thiodiazole Ag(Ⅰ) were prepared in a solution of water-ethanol. The shape, composition and structure of the nanoparticles were characterized by means of transmission electron microscope(TEM), scanning electron microscope(SEM), Fourier transform infrared spectrometer(FT-IR) and thermal analyzer(TG-DTA). In addition, the tribological properties were investigated with a four-ball tribometer. The result shows that the nanoparticles obtained disperse in organic solvents very well. They also have a Keggin structure with the mean graininess diameter about 20 nm. The decomposition temperature is between 220~370 ℃. As a new-type lube additive, when the load is 300 N, the reaction time is 30 min and the rotation speed is 1 450 r/min, the best additive mass fraction is 0.05%, with the tribological spot decreased by 43.4% and the friction coefficient decreased by 23.6%.更多还原