Mechanical and thermal properties of vitamin E-doped UHMWPE reinforced with hydroxyapatite

IF 1.6 Q4 MATERIALS SCIENCE, COATINGS & FILMS Tribology - Materials, Surfaces & Interfaces Pub Date : 2020-10-14 DOI:10.1080/17515831.2020.1830252

P. Saravanan, Latifa Melk, N. Emami

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引用次数: 1

Abstract

ABSTRACT The unique biocompatible and wear resistant nature of ultrahigh molecular weight polyethylene (UHMWPE) makes it a suitable material for load bearing applications in total joint replacements (TJR). However, oxidation induced wear is a common cause limiting the life span of implants. Hence, Vitamin-E, a common antioxidant, is added to prevent the wear loss due to oxidation of UHMWPE. In addition, Hydroxyapatite does improve the toughening mechanisms occurring in the polymer matrices. Hence, in this study, a novel hydroxyapatite (HA) nanoparticles reinforced Vitamin-E doped UHMWPE nanocomposites (UHMWPE-E/HA) were developed here in this work. The HA concentration was varied between 0.5 - 3 wt.% and optimum wt% is reported. The mechanical and thermal properties were investigated thoroughly using an array of characterizations. Particularly, a considerable improvement in fracture toughness (KIC) was obtained. Detailed examination of fractured surfaces was performed to understand the effect of HA reinforcement on fracture toughness of UHMWPE-E/HA nanocomposites. GRAPHICAL ABSTRACT

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羟基磷灰石增强维生素e掺杂超高分子量聚乙烯的力学和热性能

摘要超高分子量聚乙烯（UHMWPE）独特的生物相容性和耐磨性使其成为全关节置换术（TJR）中承载应用的合适材料。然而，氧化引起的磨损是限制植入物寿命的常见原因。因此，添加了维生素E，一种常见的抗氧化剂，以防止由于UHMWPE的氧化而导致的磨损损失。此外，羟基磷灰石确实改善了聚合物基体中的增韧机制。因此，本研究开发了一种新型羟基磷灰石（HA）纳米颗粒增强维生素E掺杂的UHMWPE纳米复合材料（UHMWPE-E/HA）。HA浓度在0.5-3wt%之间变化，并报道了最佳wt%。通过一系列表征对其力学性能和热性能进行了深入研究。特别地，获得了断裂韧性（KIC）的显著提高。对断裂表面进行了详细的检查，以了解HA增强对UHMWPE-E/HA纳米复合材料断裂韧性的影响。图形摘要

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Tribology - Materials, Surfaces & Interfaces MATERIALS SCIENCE, COATINGS & FILMS-

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2.80

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