Influence of processing conditions on microstructural, mechanical and tribological properties of graphene nanoplatelet reinforced UHMWPE
Resumen: Ultra-high molecular weight polyethylene (UHMWPE) is a relevant thermoplastic in industry and a well-proven standard biomaterial in joint replacements. To enhance its tribological properties while preserving its bulk ones, composite coatings on a UHMWPE substrate were prepared using non-functionalised graphene nanoplatelet (GNP) at reinforcement concentration of 0.1–5 wt% and two mechanical mixing techniques (ball mill or blade mixer) with different consolidation temperatures of 175–240 °C. Changes in morphology and size of the UHMWPE particles before hot-pressing were observed in function of the mechanical mixing techniques applied. Wear rate was affected by graphene content, reaching a minimum at 0.5 wt% GNP, with a reduction of 20 and 15%, for ball milling and blade mixer, respectively. However, blade mixer increased the wear rate by around twice respect the ball milling results, for all the studied materials. The coefficient of friction decreased notably, by ~25%, below 3 wt% GNP content, and hardness increased by 24%, regardless of the mechanical mixing process used. Finally, consolidation temperature had a positive influence on wear rate at temperatures of around 195 °C, which could be related to the free radical scavenger effect of the GNP.
Idioma: Inglés
DOI: 10.1016/j.jmbbm.2020.104248
Año: 2021
Publicado en: Journal of the Mechanical Behavior of Biomedical Materials 115 (2021), 104248 [15 pp]
ISSN: 1751-6161

Factor impacto JCR: 4.042 (2021)
Categ. JCR: ENGINEERING, BIOMEDICAL rank: 48 / 98 = 0.49 (2021) - Q2 - T2
Categ. JCR: MATERIALS SCIENCE, BIOMATERIALS rank: 27 / 46 = 0.587 (2021) - Q3 - T2

Factor impacto CITESCORE: 6.6 - Materials Science (Q1) - Engineering (Q1)

Factor impacto SCIMAGO: 0.746 - Biomedical Engineering (Q2) - Biomaterials (Q2)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/RIS3-LMP21-18
Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/T48-17R
Tipo y forma: Artículo (PostPrint)
Área (Departamento): Área Cienc.Mater. Ingen.Metal. (Dpto. Ciencia Tecnol.Mater.Fl.)

Creative Commons Debe reconocer adecuadamente la autoría, proporcionar un enlace a la licencia e indicar si se han realizado cambios. Puede hacerlo de cualquier manera razonable, pero no de una manera que sugiera que tiene el apoyo del licenciador o lo recibe por el uso que hace. No puede utilizar el material para una finalidad comercial. Si remezcla, transforma o crea a partir del material, no puede difundir el material modificado.


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