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采用往复式滑动摩擦磨损试验机,考察了在胎牛血清蛋白(BSA)润滑环境下,氧化石墨烯/超高分子量聚乙烯(GO/UHMWPE)复合材料的摩擦学性能.试验结束后,利用高分辨扫描电子显微镜(HR-SEM)和Micro-XAM非接触式三维表面轮廓仪观察试样表面磨痕并计算相应的磨损率.结果表明:在BSA润滑环境下,相对纯UHMWPE,尽管无机增强填料GO的添加可以显著降低复合材料的稳态摩擦系数(COF),但是随GO含量增加无明显变化.然而,复合材料的体积磨损率(WR)却随GO含量增加呈现出逐渐减小的趋势.因此无机填料GO可以显著改善UHMWPE在BSA润滑环境下的摩擦学性能.
The tribological properties of graphene oxide / ultrahigh molecular weight polyethylene (GO / UHMWPE) composites were investigated using a reciprocating sliding friction and wear tester at the BSA lubrication environment. After the test, The surface wear marks were observed by HR-SEM and Micro-XAM non-contact three-dimensional surface profilometer and the corresponding wear rates were calculated.The results showed that in the BSA lubrication environment, the relative pure UHMWPE, although the inorganic reinforcing filler The addition of GO can significantly reduce the steady-state coefficient of friction (COF) of the composites, but does not change significantly with the increase of GO content. However, the volumetric wear rate (WR) of composites shows a decreasing trend with the increase of GO content. Therefore, the inorganic filler GO can significantly improve the tribological properties of UHMWPE under BSA lubrication.