Pi/Pai-E44 Synthesis-Inspired Composite Coating with Graphene-Reinforced Hydroxyapatite: Enhanced Wear Resistance, Antibacterial Properties, Biological Activity, and Corrosion Resistance

Abstract

To enhance the tribological properties, hydrophilicity, corrosion resistance, cell activity, andante bacterial performance of artificial joints, new coatings with varying graphene nanosheet (GNS) contents were prepared. Under simulated body fluid lubrication, the incorporation of GNS improved the tribological properties due to its excellent mechanical characteristics. The coefficient of friction and wear rate of the coating under 1 wt% GNS were reduced by 0.154 and 1.48×10-5 mm3N-1m-1, respectively. The coating exhibited outstanding cellular activity and antimicrobial properties, achieving 99.5% and 97.5%, respectively. The results indicated that 1 wt% GNS significantly enhanced the corrosion resistance of the coating, resulting in the lowest corrosion rate of 1.15×10-10 A/cm2. These findings underscore the potential of graphene nanosheet hydroxyapatite coatings for medical applications.

Keywords: tribological wear, corrosion resistance, Cellular viability, Antibacterial properties, Biomedical.