Visco Annamaria, Yousef Samy, Scolaro Cristina, Espro Claudia, Cristani Mariateresa
Department of Engineering, University of Messina, C.da Di Dio, 98166 Messina, Italy.
Institute for Chemical-Physical Processes CNR-IPCF, Viale Ferdinando Stagno d'Alcontres, 37, 98158 Messina, Italy.
Polymers (Basel). 2018 Nov 21;10(11):1291. doi: 10.3390/polym10111291.
Ultra High molecular weight polyethylene (UHMWPE) suffers wear degradation in total joint replacements and it needs to be improved. Thus, we enhanced wear resistance of UHMWPE with carbon nanofiller and paraffin oil and studied its tribological behavior in Simulated Synovial Fluid (SSF) for 60 days at 37 °C to reproduce the conditions of a real joint. Ageing in biological fluid accelerates the wear action but nanocomposite exhibited a higher wear resistance compared to UHMWPE because of its higher structural homogeneity. Carbon nanofiller closes the porosity of UHMWPE hindering SSF to penetrate inside. Wear resistance of the nanocomposite with 1.0 wt.% of CNF improved of 65% (before ageing) and of 70% (after 60 days in SSF) with respect to pure UHMWPE.
超高分子量聚乙烯（UHMWPE）在全关节置换中会发生磨损降解，需要对其进行改进。因此，我们用碳纳米填料和石蜡油提高了UHMWPE的耐磨性，并在37℃的模拟滑液（SSF）中研究了其60天的摩擦学行为，以重现真实关节的条件。在生物流体中的老化会加速磨损作用，但纳米复合材料由于其更高的结构均匀性，与UHMWPE相比表现出更高的耐磨性。碳纳米填料封闭了UHMWPE的孔隙，阻碍了SSF渗入内部。相对于纯UHMWPE，含1.0 wt.% 碳纳米纤维（CNF）的纳米复合材料的耐磨性在（老化前）提高了65%，在SSF中60天后提高了70%。
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