氧化程度对氧化石墨改性环氧树脂涂层摩擦学性能的影响

通过改变H2SO4／KMnO4氧化体系，制备出几种不同氧化程度的氧化石墨，分别对环氧树脂涂层进行填充耐磨改性。通过红外光谱和扫描电镜分析、电性能测试及摩擦磨损性能试验，研究硫酸用量、氧化石墨电阻与氧化程度三者之间的关系，考察氧化程度对氧化石墨结构及其填充改性环氧树脂耐磨涂层摩擦学性能的影响。结果表明：硫酸用量的增加引起氧化石墨电阻和氧化程度非线性增大，同时氧化石墨层状结构剥离成氧化石墨片的程度增加。氧化程度在95％以上的氧化石墨已失去固体润滑特性，导致填充改性环氧涂层摩擦性能下降，磨损增加，氧化程度约85％的氧化石墨填充改性涂层的综合性能最佳。

Effect of Oxidation Degree on Tribological Properties of Graphite Oxide Modified Epoxy Resin Coatings

Several types of graphite oxide （GO） with different oxidation degree were prepared by changing the ratio of H2 SO4/KMnO4, and were used as solid lubricant to modify epoxy resin coatings. Through tests of electrical and tribological properties and analysis of FT-IR and SEM, the relationships among H2SO4 content, electrical resistance and oxidation degree of GO and effects of oxidation degree on structures of GO and tribological properties of GO filled epoxy resin coatings were investigated. The results showed that the electrical resistance and oxidation degree of GO increased with increasing amount of H2SO4, and graphite layers were exfoliated to form different structures of GO. More than 95% oxidation degree GO lost its solid lubricating property and its filled coating had a poor tribological properties. The coating filled with GO of oxidation degree around 85 % had an excellent tribological properties.