▎ 摘　　要

NOVELTY - Graphene-polyaniline co-modified chitosan material is prepared by (a) adding graphene oxide to N,N-dimethylformamide solvent, ultrasonically dispersing, adding maleic anhydride, heating, uniformly stirring and reacting, centrifugally separating, washing and drying, (b) adding chitosan to deionized water, adding acetic acid solution until completely dissolving the chitosan, adding carboxylated graphene, ultrasonically dispersing, adding catalyst and activator, filtering solvent, washing and drying, (c) adding graphene modified chitosan to acetic acid solution, ultrasonically dispersing, adding aniline and protonic acid perfluorooctanoic acid, dripping initiator ammonium persulfate solution, stirring and reacting, precipitating out, filtering, washing and drying, and (d) adding graphene-polyaniline modified chitosan to acetic acid solution, adding crosslinking agent glutaraldehyde, stirring and reacting, adding plasticizer glycerol, pouring solution to mold, vacuum defoaming and curing. USE - As graphene-polyaniline co-modified chitosan material. ADVANTAGE - The chitosan material exhibits synergistic effect, reduces the aggregation of graphene, forms three dimensional continuous barrier layer, prolongs and separates the diffusion path of corrosive medium, blocks the transmission of corrosive medium, improves the chemical anti-corrosion performance of material and initiation of ammonium persulfate, improves the interfacial compatibility between polyaniline and chitosan, ensures excellent conductivity under action of proton-doped perfluorooctanoic acid, is anti-corrosive and connected with graphene with excellent conductivity to form three-dimensional conductive network, and has improved electrochemical anti-corrosion performance. DETAILED DESCRIPTION - Graphene-polyaniline co-modified chitosan material is prepared by (a) adding graphene oxide to N,N-dimethylformamide solvent, ultrasonically dispersing, adding maleic anhydride, heating at 70-90 degrees C in constant-temperature water bath pot, uniformly stirring and reacting for 1-3 hours, centrifugally separating, washing and drying to obtain carboxylated graphene, (b) adding chitosan to deionized water, adding acetic acid solution until completely dissolving the chitosan, adding carboxylated graphene, ultrasonically dispersing, adding catalyst and activator, uniformly stirring and reacting for 6-12 hours in nitrogen atmosphere, precipitating out, filtering solvent, washing and drying to obtain graphene modified chitosan, (c) adding graphene modified chitosan to 3-6 %mass acetic acid solution, ultrasonically dispersing, adding aniline and protonic acid perfluorooctanoic acid, dripping initiator ammonium persulfate solution, uniformly stirring and reacting for 2-4 hours, precipitating out, filtering, washing and drying to obtain graphene-polyaniline modified chitosan, and (d) adding graphene-polyaniline modified chitosan to 3-6 %mass acetic acid solution, adding crosslinking agent glutaraldehyde, uniformly stirring and reacting for 2-4 hours, adding plasticizer glycerol, pouring obtained solution to mold, performing vacuum defoaming, and curing to obtain film to obtain chitosan material.