▎ 摘　　要

NOVELTY - Preparation of composite material involves adding graphite oxide and solvent to ultrasonic irradiation reactor to obtain a graphene oxide solution, adding 0.01-10 pts. wt. melamine and 100-3000 pts. wt. solvent to three-necked bottle, heating to 80-150 degrees C for 1-5 hours under stirring speed of 50-500 rpm to obtain a melamine solution, dropping the prepared graphene oxide solution to melamine solution to obtain a stable melamine-graphene oxide composite suspension, washing with suction, filtering, drying to obtain melamine-graphene oxide composite powder, heat-treating, subjecting to microwave treatment to produce a melamine-reduced graphene oxide composite masterbatch, adding polyurethane, melamine-reduced graphene oxide masterbatch, filler, antioxidant, plasticizer, catalyst to equipment, melt blending at 10-300 degrees C for 1-60 minutes, molding, injection molding to obtain polyurethane flame retardant antistatic composite material. USE - Preparation of composite material. ADVANTAGE - The prepared composite material has excellent mechanical properties and provides reduced graphene, which has amino groups on its surface with good compatibility with melamine and avoids the self-polymerization of graphene. The presence of reduced graphene makes the melamine grains smaller, graphene can reduce the strong hydrophilicity of melamine and interface bonding properties of melamine and polyurethane is improved. DETAILED DESCRIPTION - Preparation of composite material involves adding 0.01-10 pts. wt. graphite oxide and solvent 100-3000 pts. wt. solvent to ultrasonic irradiation reactor under the conditions of ultrasonic power of 10-5000 W, frequency of 10-10000 Hz, temperature of 20-200 degrees C, ultrasonically dispersing for 5 minutes to 5 hours to obtain a graphene oxide solution, adding 0.01-10 pts. wt. melamine and 100-3000 pts. wt. solvent to three-necked bottle, heating to 80-150 degrees C for 1-5 hours under stirring speed of 50-500 rpm to obtain a melamine solution, dropping the prepared graphene oxide solution to melamine solution at a drop rate of 3-15 mL/minute at temperature of 80-150 degrees C under stirring speed of 50-500 rpm to obtain a stable melamine-graphene oxide composite suspension, washing with suction, filtering, drying under vacuum of 0.1-0.01 MPa and a temperature of 10-200 degrees C to obtain melamine-graphene oxide composite powder, heat-treating at 100-250 degrees C for 1-6 hours, subjecting to microwave treatment at microwave power of 60-100 KW and microwave frequency of 1500-2000 MHz for 3 minutes to 5 hours to produce a melamine-reduced graphene oxide composite masterbatch, adding 0.01-100 pts. wt. polyurethane, 0.0-100 pts. wt. melamine-reduced graphene oxide masterbatch, 0.0-100 pts. wt. filler, 0.01-10 pts. wt. antioxidant, 0.01-10 pts. wt. antioxidant, 0.01-40 pts. wt. plasticizer, 0.0.-10 pts. wt. catalyst to equipment, melt blending at 10-300 degrees C for 1-60 minutes, molding, injection molding to obtain polyurethane flame retardant antistatic composite material.