在胎牛血清蛋白润滑环境下GO/UHMWPE复合材料的摩擦学性能研究

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.

Tribological Property of GO/UHMWPE Composites under the Lubrication of Bovine Serum Albumin

Under the lubrication of bovine serum albumin, the tribological property of Graphene oxide (GO)/UHMWPE composites were investigated using the reciprocating friction testing apparatus. After the wear test, the surface topographies and the wear volume of these composites were observed and evaluated by a high-resolution scanning electron microscope and an Micro-XAM three-dimensional surface profiler. The results demonstrate that compared with the pure UHMWPE, although the steady coefficient of friction of the composite was reduced, but no markedly changes were observed with the gradual increasing of GO content. However, for the wear rate of these composites was reduced significantly as the increasing content of GO. Therefore, under the lubrication of BSA, the wear resistance of UHMWPE was improved markedly with the addition of GO filler.