▎ 摘　　要

NOVELTY - Preparation of graphene polyphosphazene nano composite material comprises adding concentrated sulfuric acid into natural graphite; adding potassium permanganate; reacting for 2 hours at low temperature; reacting for 1 hour at constant temperature water bath; adding deionized water; controlling temperature at 100 degrees C; continuously reacting for 1 hour at high temperature; diluting reaction liquid with deionized water; adding 30 mass% hydrogen peroxide until no air bubble is generated; washing product with acidic aqueous solution and deionized water; and vacuum drying to obtain graphite oxide. USE - Preparation of graphene polyphosphazene nano composite material. ADVANTAGE - The method is simple, low cost, high yield, and prepares composite material containing graphene that is uniformly coated by polyphosphazene. The composite material has good nano function and stable structure performance. DETAILED DESCRIPTION - Preparation of graphene polyphosphazene nano composite material comprises weighing natural graphite in reaction container; adding 95 mass% concentrated sulfuric acid and under ice bath of 0 degrees C; adding potassium permanganate; reacting for 2 hours at low temperature; putting into constant temperature water bath at 35 degrees C and reacting for 1 hour; adding deionized water; controlling temperature at 100 degrees C; continuously reacting for 1 hour at high temperature; shifting reaction liquid into beaker; diluting reaction liquid with deionized water; adding 30 mass% hydrogen peroxide until no air bubble is generated; washing product with acidic aqueous solution and deionized water; vacuum drying to obtain graphite oxide; ultrasonic dispersing graphite oxide into deionized water; adding 85% hydrazine hydrate; putting into oil bath at 95 degrees C; reacting for 2 hours; filtering in vacuum using PTFE filter membrane; washing with water to obtain graphene; ultrasonic dispersing graphene into specific solvent; sequentially adding hexachlorocyclotriphosphazene, 4,4'-dihydroxydiphenylsulfone and triethylamine; ultrasonically reacting for certain period; washing graphene product with solvent, deionized water, and 95% ethanol for three times; and vacuum drying for 24 hours at 50 degrees C to obtain graphene polyphosphazene nano composite material.