▎ 摘　　要

NOVELTY - Preparation of nitrogen-doped graphene/polytetrafluoroethylene composite material, involves subjecting graphene sheet to strong acid treatment to obtain nitrogen-doped graphene precursor, carrying out chemical reaction with graphene oxide and amino acid to obtain nitrogen-doped graphene, mixing nitrogen-doped graphene precursor or nitrogen-doped graphene with polytetrafluoroethylene powder and auxiliary agent, molding obtained material and sintering. USE - Preparation of nitrogen-doped graphene/polytetrafluoroethylene composite material (claimed). ADVANTAGE - The method enables preparation of nitrogen-doped graphene/polytetrafluoroethylene composite material with high-temperature resistance, excellent friction and wear properties. DETAILED DESCRIPTION - Preparation of nitrogen-doped graphene/polytetrafluoroethylene composite material, involves subjecting graphene sheet to strong acid treatment to obtain nitrogen-doped graphene precursor, carrying out chemical reaction with graphene oxide and amino acid to obtain nitrogen-doped graphene, mixing nitrogen-doped graphene precursor or nitrogen-doped graphene with polytetrafluoroethylene powder and auxiliary agent, molding obtained material and sintering. The weight ratio of nitrogen-doped graphene precursors or nitrogen-doped graphene, polytetrafluoroethylene powder and auxiliary agent is 1:100-200:10-25. The adjuvants are carbon fiber, copper powder, glass fiber, cuprous chloride, silane coupling agent, nano-zinc oxide powder and/or silicon carbide. The weight ratio of carbon fiber, copper powder, glass fiber, cuprous chloride, silane coupling agent, nano-zinc oxide powder and silicon carbide is 5-12:10-40:3-7:2-4:1:3-9:1-5.