▎ 摘　　要

NOVELTY - Preparing functionalized graphene grafted modified polyurethane material useful in flame-retardant polyurethane material comprises e.g. (i) adding toluene solvent to the reaction beaker, placing graphene oxide and 4-ethynyl aniline in the atmosphere adjustment reaction device and heating to react in a nitrogen atmosphere to obtain alkynyl functionalized graphene; (ii) adding acetone solvent, polyether polyol, toluene diisocyanate, 2,2-dihydroxybutyric acid and dibutyltin dilaurate, heating and reacting to obtain carboxy-containing polyurethane; (iii) adding thionyl chloride and polyurethane prepolymer into the reaction beaker, placing in an atmosphere adjustment reaction device, adding N,N-dimethylformamide as a catalyst, heating and refluxing to prepare chlorinated polyurethane; (iv) adding distilled water and acetone solvent into the reaction beaker, adding sodium azide, stirring, adding acetone solution of chlorinated polyurethane and reacting to obtain azide polyurethane. USE - The functionalized graphene grafted modified polyurethane material is useful in flame-retardant polyurethane material (claimed). ADVANTAGE - The method: can generate 1,2,3 triazole groups to chemically covalently graft graphene and polyurethane, improve the interface affinity and dispersion of graphene and polyurethane, avoid the agglomeration of graphene which is beneficial to enhance the tensile strength and elongation at break of polyurethane and burn surface modified graphene with high nitrogen content of 1,2,3 triazole group at high temperature, 1,2,3 triazole group; produce a large amount of incombustible gas; promote the foaming effect of polyurethane materials in the combustion process; carbonize the uniformly dispersed graphene at high temperature to form a continuous and dense foamed carbon layer; and inhibits the combustion process of polyurethane, so that it has an excellent flame retardant effect. DETAILED DESCRIPTION - Preparing functionalized graphene grafted modified polyurethane material useful in flame-retardant polyurethane material comprises (i) adding toluene solvent to the reaction beaker, placing graphene oxide and 4-ethynyl aniline in the atmosphere adjustment reaction device and heating to react in a nitrogen atmosphere to obtain alkynyl functionalized graphene; (ii) adding acetone solvent, polyether polyol, toluene diisocyanate, 2,2-dihydroxybutyric acid and dibutyltin dilaurate, heating to 65-75 degrees C and reacting for 2-4 hours to obtain carboxy-containing polyurethane; (iii) adding thionyl chloride and polyurethane prepolymer into the reaction beaker, placing in an atmosphere adjustment reaction device, adding N,N-dimethylformamide as a catalyst under a nitrogen atmosphere, heating to 75-85 degrees C and refluxing to react for 3-6 hours to prepare chlorinated polyurethane; (iv) adding distilled water and acetone solvent into the reaction beaker, adding sodium azide, stirring to dissolve, adding the acetone solution of chlorinated polyurethane at 0-5 degrees C, and reacting for 3-8 hours to obtain azide polyurethane; and (v) adding N,N-dimethylformamide solvent, azide polyurethane, alkyne functionalized graphene, promoter divinyl triamine and catalyst cuprous bromide into the reaction beaker, placing in the atmosphere adjustment reaction device, reacting for 12-24 hours under nitrogen atmosphere, dissolving the solid product in acetone solvent, pouring on a polytetrafluoroethylene board and carrying out vacuum deaeration and film formation.