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首页> 外文期刊>Journal of Applied Polymer Science >Tribo-material based on a UHMWPE/RGOC biocomposite for using in artificial joints
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Tribo-material based on a UHMWPE/RGOC biocomposite for using in artificial joints

机译：基于UHMWPE / RGOC生物复合材料的摩擦材料用于人工关节

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Reduced graphene oxide (RGOC) filler that was green synthesized by vitamin C had been included in the ultrahigh molecular weight polyethylene (UHMWPE) matrix to produce biocomposite possessing improved properties especially against wear. The biocomposites filled with different loading (0.1, 0.3, 1.0, and 2.0 wt%) of RGOC was produced by a method of liquid phase ultrasonic mixing and then hot press molding. The structural analysis results of biocomposites showed that RGOC well-dispersed in polymer matrix and confirmed that there was interaction between the RGOC-UHMWPE. The biocomposite containing 2.0 wt% RGOC (UHMWPE/RGOC-2) gave the maximum microhardness and the value increased by 22. 5% compared with unfilled polymer. At the same RGOC content, the biocomposite had the highest thermal stability with residue content at 2.42%. The wear and friction behavior of biocomposites were carried out in a reciprocating friction testing machine under distilled water lubricating conditions. The UHMWPE/RGOC-2 biocomposite had the lowest friction coefficient value (0.034) and the wear rate of the biocomposite decreased by 44%, compared with that of unfilled UHMWPE. Furthermore, fatigue wear tracks were significantly reduced. This study suggests the use of this composite that had excellent tribological behavior as biomaterial instead of UHMWPE.
机译：由维生素C绿色合成的还原氧化石墨烯（RGOC）填料已被加入超高分子量聚乙烯（UHMWPE）基质中，以制备具有改进性能尤其是耐磨性的生物复合材料。通过液相超声混合然后热压成型的方法制备了填充不同负载量（0.1,0.3,1.0和2.0 wt%）RGOC的生物复合材料。生物复合材料的结构分析结果表明，RGOC在聚合物基体中分散良好，并证实RGOC-UHMWPE之间存在相互作用。含有2.0 wt%RGOC（UHMWPE/RGOC-2）的生物复合材料的显微硬度最大，值增加了22。与未填充聚合物相比为5%。在相同的RGOC含量下，生物复合材料的热稳定性最高，残渣含量为2.42%。在往复式摩擦试验机上，在蒸馏水润滑条件下研究了生物复合材料的磨损和摩擦行为。与未填充的UHMWPE相比，UHMWPE/RGOC-2生物复合材料的摩擦系数最低（0.034），磨损率降低了44%。此外，疲劳磨损痕迹显著减少。这项研究建议使用这种具有优异摩擦学性能的复合材料代替UHMWPE作为生物材料。

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