Tensile Properties Of Graphene Nanoplatelet Reinforced Ultra-High Molecular Weight Polyethylene Composites

Mohd Hanafiah, Muhammad Harzelan (2020) Tensile Properties Of Graphene Nanoplatelet Reinforced Ultra-High Molecular Weight Polyethylene Composites. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Ultra-high Molecular Weight Polyethylene (UHMWPE) has been used extensively in orthopaedic implant fabrications as a component in total joint replacement especially for hip and knee replacement. A good reinforcing filler, Graphene Nanoplatelet (GNP) with different amounts (0.1, 0.3, 0.5, and 1.0 wt. %) were used to fabricate the GNP/UHMWPE composite. The composites were fabricated by the dry mixing process as a technique to mix these two materials followed by the hot-pressing with reference to ASTM D638 Type 1 standard. The process continued with several tests in order to fulfil the objective of the study. The objectives of this study are to fabricate the sample of Neat UHMWPE and GNP/UHMWPE composite, to investigate the effects of GNP on tensile properties of GNP/UHMWPE composite and to evaluate the effects of GNP composition in GNP/UHMWPE composite. From density analysis, the result shows that the density between theoretical and experimental have slightly different. The microhardness test shows that the GNP can increase the hardness of the composite with increasing amounts of GNP. The conductivity test shows that the small amount of GNP added do not conduct electric while at higher wt. % can conduct electric. The key findings from tensile test included the GNP with 0.1 wt. % can increase the tensile strength and tensile strain of the composite and decreased from 0.3 to 1.0 wt. %. The addition of GNP up to 0.3 wt. %. also enhanced the Young’s modulus of the composite. The GNP/UHMWPE displayed a remarkable combination of enhanced the tensile properties and others which making the composites safe to be used as material in arthroplasty implant in human body.

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