Influence of processing conditions on microstructural, mechanical and tribological properties of graphene nanoplatelet reinforced UHMWPE
نویسندگان
چکیده
Ultra-high molecular weight polyethylene (UHMWPE) is a relevant thermoplastic in industry and well-proven standard biomaterial joint replacements. To enhance its tribological properties while preserving bulk ones, composite coatings on UHMWPE substrate were prepared using non-functionalised graphene nanoplatelet (GNP) at reinforcement concentration of 0.1–5 wt% two mechanical mixing techniques (ball mill or blade mixer) with different consolidation temperatures 175–240 °C. Changes morphology size the particles before hot-pressing observed function applied. Wear rate was affected by content, reaching minimum 0.5 GNP, reduction 20 15%, for ball milling mixer, respectively. However, mixer increased wear around twice respect results, all studied materials. The coefficient friction decreased notably, ~25%, below 3 GNP hardness 24%, regardless process used. Finally, temperature had positive influence 195 °C, which could be related to free radical scavenger effect GNP.
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ژورنال
عنوان ژورنال: Journal of The Mechanical Behavior of Biomedical Materials
سال: 2021
ISSN: ['1751-6161', '1878-0180']
DOI: https://doi.org/10.1016/j.jmbbm.2020.104248