▎ 摘　　要

NOVELTY - Method for preparing ultra-high molecular weight polyethylene composite material involves (i) selecting medical-grade ultra-high molecular weight polyethylene powder as base material, and drying to obtain dried powder, (ii) adding the dried powder to mold, pre-pressing, placing mold in heat-preservation box, heat-preserving, pressing mold to obtain polyethylene composite material sheet, and cooling to room temperature, (iii) preparing graphene oxide solution using absolute ethanol as solvent, (iv) soaking molded polyethylene material in graphene oxide solution for sealing treatment, (v) placing soaked polyethylene material in ultrasonic processor, performing ultrasonic induction, and enabling graphene oxide solution to penetrate to polyethylene substrate to obtain polyethylene composite material, and (vi) washing polyethylene composite material obtained in step (v) with deionized water and blow-drying by a blower. USE - The method for preparing ultra-high molecular weight polyethylene composite material. ADVANTAGE - The method is simple and easy to operate. The polyethylene composite material has excellent biocompatibility, tribological property, friction resistance and wear resistance. DETAILED DESCRIPTION - Method for preparing ultra-high molecular weight polyethylene composite material, involves (i) selecting medical-grade ultra-high molecular weight polyethylene powder as base material, and drying to obtain dried powder, (ii) adding dried powder to mold, pre-pressing by flat vulcanizing machine, placing mold in heat-preservation box at 150-200 degrees C, heat-preserving for 2-3 hours, pressing mold to obtain polyethylene composite material sheet, and cooling to room temperature, (iii) preparing graphene oxide solution using absolute ethanol as solvent, where concentration of the graphene oxide solution is 0.5-1 %mass, (iv) soaking molded polyethylene material in graphene oxide solution for sealing treatment, (v) placing soaked polyethylene material in ultrasonic processor under constant temperature environment, performing ultrasonic induction for 4-12 hours, and enabling graphene oxide solution to penetrate to polyethylene substrate to obtain polyethylene composite material with excellent biofriction performance, and (vi) washing polyethylene composite material obtained in step (v) with deionized water and blow-drying by blower.