基于2-辛硫基-5-巯基-1,3,4-噻二唑Ag(Ⅰ)修饰的Keggin钼硅酸盐纳米颗粒摩擦学性能  

Tribological Properties of Keggin Siliconmolybdate Nanoparticles Modified with 2-Octathio-5-mercapto-1,3,4-thiadiazole Ag(Ⅰ)

作　　者：段天宝[1] 路培中[1] 曲黎[1] 张付特[1] 叶文玉[1] 

机构地区：[1]河南大学化学化工学院,开封475001

出　　处：《应用化学》2007年第11期1299-1303,共5页Chinese Journal of Applied Chemistry

基　　金：河南省科技攻关资助项目(0424270066)

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％。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%.

关 键 词：辛硫基巯基噻二唑 KEGGIN结构 纳米颗粒 摩擦性能 钼硅酸盐 

分 类 号：O613.7[理学—无机化学]