▎ 摘　　要

NOVELTY - Hyper-branched polyamide functional graphene composite material is claimed. The hyper-branched polyamide is uniformly grafted on the surface of the graphene by a covalent bond, where the wt.% of hyper-branched polyamide is 5-80%. USE - The composite material is useful: for polymer-modification (claimed); and in mechanical, electronic and chemical engineering fields. ADVANTAGE - The method is simple, and suitable for mass production; produces the functionalized graphene with good dispersibility; and greatly improves the mechanical and dielectric properties of the polymer matrix with low doping amount. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the hyper-branched polyamide functional graphene composite material, comprising (i) dissolving graphene oxide and ethylenediamine in an organic solvent, carrying out ring-opening reaction and amidation reaction in presence of a catalyst to obtain precursor-ethylenediamine grafted graphene oxide, where the reaction temperature is 50-80 degrees C, where the concentration of the graphene oxide is 2-5 mg/ml, and the mass ratio of the ethylenediamine and graphene oxide is (5-20):1; and (ii) adding 3,5-diamino benzoic acid monomer and ethylenediamine grafted graphene oxide in a solvent, reacting in presence of a catalyst and a dehydrating agent, and processing polymerization initiation of ethylenediamine graft graphene oxide surface by 3,5-diamino benzoic acid monomer to obtain the hyper-branched polyamide functional graphene composite material, where the reaction process is divided into two continuous reaction stage, in which the two reaction stages are carried out in different reaction temperatures, where the reaction temperature of the first reaction stage is lower than the reaction temperature of the second reaction stage.