▎ 摘　　要

NOVELTY - Halogen-free flame-retardant graphene-modified flame-retardant polypropylene material comprises polypropylene, graphene oxide, compatibilizer, antioxidant. USE - Halogen-free flame-retardant graphene-modified flame-retardant polypropylene material used for household appliance. ADVANTAGE - The halogen-free flame-retardant graphene-modified flame-retardant polypropylene material has good flame retardant property and mechanical property and is used for a long time, does not affect the appearance of the product, and is environment-friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing halogen-free flame-retardant graphene-modified flame-retardant polypropylene material for household appliance, which involves: (A) adding 1-8 g of graphene oxide, 30-50 g of sodium hydroxide into 100-200 mL of water and stirring uniformly, heating at 90-110 degrees C, reacting for 1-3 hours, centrifuging, washing, drying to obtain the pre-processed graphene oxide; (B) adding 3-5 g of six pairs of carboxyl phenoxycyclotriphosphazene, 10-15 g 3-(trimethyl silicon group) propiolic alcohol, 1-5 g of sodium hydroxide, 10-20 mL of toluene into 80-100 mL of acetone, stirring uniformly, heating at 30-60 degrees C, reacting for 16-20 hours, rotary steaming, taking precipitate, washing, centrifuging, drying, obtaining cyclotriphosphazene containing alkynyl; (C) adding 1-2 g of carboxyl siloxane, 0.1-1 g of 4-azide butanol, 0.5-5 g of pre-treated graphene oxide into 20-50 mL of acetone, heating at 60-80 degrees C, reacting for 5 hours under the nitrogen atmosphere to obtain the azide modified graphene oxide; (D) adding 1-3 g of cyclotriphosphazene containing alkynyl, 1-4 g of azide modified graphene oxide, 0.5-1 g of ascorbic acid, 0.5-2 g of copper sulfate to 30-80 mL of N,N-dimethylformamide and heating to 70-90 degrees C in the nitrogen atmosphere, reacting for 3-5 hours, centrifuging, washing, drying to obtain the cyclotriphosphazene modified graphene oxide; and (E) adding 2-5 g of modified graphene oxide, 10-25 g of inorganic compound into 200-500 mL of water and stirring uniformly to obtain the mixed material, subjecting material for ultrasonic treatment at 500-1000 watt, 20-40 kilohertz for 5-20 minutes, then adding 2-5 wt.% ammonia aqueous solution to adjust pH to 8-10, allowing to stand for 2-5 hours at room temperature, centrifuging, taking precipitate and washing to pH 7, drying to obtain the functionalized graphene oxide.