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Research into the thermal stability and mechanical properties of vitamin E diffusion modified irradiation cross-linked graphene oxide/ultra-high molecular weight polyethylene composites

机译：维生素E扩散改性辐射交联石墨烯氧化物/超高分子量聚乙烯复合材料的热稳定性和力学性能研究

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摘要

Recently, there has been increasing interest in modifying ultra-high molecular weight polyethylene (UHMWPE) due to glaring needs in the artificial joint replacement field. It is generally reported in the literature that irradiation cross-linking and adding graphene oxide (GO)/vitamin E (VE) can enhance the mechanical properties of UHMWPE, but this can sacrifice the oxidation stability and gel content. This paper examines how VE diffusion can influence irradiation cross-linked GO/UHMWPE composites and whether mechanical performance and oxidation resistance can be maintained simultaneously, which will provide new guidance for prolonging the longevity of UHMWPE implants. The GO/UHMWPE composites were fabricated by means of liquid ultrasonic dispersion, hot pressing and irradiation cross-linking, followed by VE diffusion and homogenization treatment. The results indicated that limited VE diffusion decreased the water absorption and wettability. The crystallinity, melting temperature, thermal stability, hardness and scratch resistance of the composites basically remain essentially the same, except in the case of pure UHMWPE. In addition, the oxidation resistance was improved significantly after incorporating VE. Furthermore, the diffusion and enhancement mechanisms were also demonstrated, respectively.
机译：最近，由于人工关节置换场中的粗糙需要，对改变超高分子量聚乙烯（UHMWPE）的兴趣越来越感兴趣。通常在文献中报道，照射交联和添加石墨烯氧化物（GO）/维生素E（VE）可以增强UHMWPE的机械性能，但这可以牺牲氧化稳定性和凝胶含量。本文研究了VE扩散如何影响照射交联的GO / UHMWPE复合材料，以及是否可以同时保持机械性能和抗氧化性，这将为延长UHMWPE植入物的寿命提供新的引导。通过液体超声波分散，热压和辐射交联，然后进行均匀化和均质化处理来制造GO / UHMWPE复合材料。结果表明，有限的VE扩散降低了吸水性和润湿性。除了纯UhmWpe的情况下，复合材料的结晶度，熔化温度，热稳定性，硬度和耐刮擦性基本保持基本相同。此外，掺入后显着改善氧化抗性。此外，还分别证明了扩散和增强机制。

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  • 来源
    《RSC Advances》 |2020年第8期|共14页
  • 作者

    Duan Weipeng; Wu Meiping; Han Jitai; Ni Zifeng;

  • 作者单位

    Jiangnan Univ Sch Mech Engn Wuxi 214122 Jiangsu Peoples R China;

    Jiangnan Univ Sch Mech Engn Wuxi 214122 Jiangsu Peoples R China;

    Jiangnan Univ Sch Mech Engn Wuxi 214122 Jiangsu Peoples R China;

    Jiangnan Univ Sch Mech Engn Wuxi 214122 Jiangsu Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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