碳-碳双键修饰纳米SiO_2及其摩擦学性能  

Surface-modification of Silica Nanoparticles by Carbon-carbon Double Bonds and Its Tribological Properties

作　　者：欧宝立[1] 

机构地区：[1]湖南科技大学化学化工学院,湖南湘潭411201

出　　处：《材料工程》2009年第4期57-60,共4页Journal of Materials Engineering

基　　金：湖南省自然科学基金资助项目(06JJ20036);中南大学创新基金资助项目(1343-76210)

摘　　要：采用两步法将可聚合碳-碳双键以化学键形式键接到纳米SiO2表面合成可反应型功能化SiO2。通过红外测试,透射电镜(TEM),润湿性实验和分散性等实验评价表面修饰效果,采用四球摩擦磨损试验机和往复摩擦磨损试验机考察了纳米SiO2作为汽油机油添加剂的摩擦磨损行为。结果表明:修饰后的纳米SiO2可直接分散于基础油等油性介质中,并具有良好的分散稳定性;作为润滑油添加剂表现出优异的抗磨减摩性能,并对磨损表面起到一定的修复作用。Immobilization of carbon-carbon double bonds at silica nanoparticles surface was successfully achieved to gernerize reactable functionalized silica nanoparticles. The as-prepared samples were char- acterized by FTIR, TEM, wetting and dispersivity experiments. Friction reducing and anti-wear be- havior of the as-prepared functionalized silica used as additive in lubricant were evaluated on wear tester. The results indicated that the functionalized silica nanoparticles can well dispersed in lubricant oil, which contributed to greatly improvement on anti-wear and friction reducing ability of gas mobile oil, and also can repair worn surface to a certain degree due to forming polymer films at rubbing surface.

关 键 词：纳米二氧化硅 表面修饰 摩擦磨损性能 

分 类 号：O69[理学—化学] TH117.3[机械工程—机械设计及理论]