氧化石墨烯/聚乙二醇复合材料在人工关节材料上的润滑性能

Tribological properties of graphene oxide/polyethylene glycol composites applied on artificial joint

摘要: 通过销盘试验分析氧化石墨烯（GO）、聚乙二醇（PEG）和不同比例的GO/PEG复合材料的摩擦学性能，考察GO增强PEG在人工关节材料UHMWPE-CoCrMo配副上的润滑效果，并利用FTIR、XRD、拉曼光谱等研究了GO/PEG复合材料的结构和性能。结果表明：混合比例为0.85wt% GO与40wt% PEG的GO/PEG复合材料在4.2 MPa加载载荷、0.024 m/s的滑动速度条件下，平均摩擦系数为0.015，具有良好的润滑效果；GO均匀地分散在PEG溶液中，组分间较强的界面相互作用协同增强了GO/PEG复合材料的润滑性能。

Abstract: The tribological properties of graphene oxide(GO), polyethylene glycol (PEG) and different proportions of the GO/PEG composites were researched through pin and disc experiment, and the lubrication effect of PEG intensified by GO was investigated in UHMWPE-CoCrMo artificial joint materials. The structure and properties of GO/PEG composites were studied by FTIR, XRD and Laser Roman spectrometer in detail.The results show that the GO/PEG composites including 0.85wt% GO and 40wt% PEG have good lubrication effect, the average friction coefficient achieves 0.015 under the condition of 0.024 m/s sliding speed and 4.2 MPa load. GO is dispersed in PEG solution homogeneously, and the lubrication effect of GO/PEG composites can be improved significantly by the strong interfacial interactions between both components.