▎ 摘　　要

NOVELTY - Preparing graphene oxide graft modified melamine pyrophosphate flame retardant, comprises (i) adding melamine and anhydrous sodium pyrophosphate into distilled water, stirring and dispersing uniformly; (ii) adding ultrasonic dispersed graphene oxide colloidal solution, dropping catalytic and stabilizing effect protonic acid dilute solution, regulating pH of the reaction system, heating, stirring and reacting; (iii) suction filtering the reaction product washing and drying to obtain graphene oxide modified halogen-free melamine pyrophosphate flame retardant. USE - The flame retardant is useful for polyamide, polyester, rubber and expandable fireproof paint. ADVANTAGE - The method is simple, ensures easy operation and is environmentally friendly. The halogen-free flame retardant has small particle size and high thermal stability.