▎ 摘　　要

NOVELTY - A preparation method of polyacrylonitrile antibacterial fiber film, involves (S1) ultrasonically dispersing graphene oxide in deionized water, adding polydopamine, stirring, adding copper nitrate, dissolving, reacting, cooling, filtering, washing, and drying to obtain modified graphene oxide, (S2) dissolving chitosan and antibacterial peptide, adding modified graphene oxide, stirring, filtering, and collecting the filtrate and filter residue, (S3) adding citric acid into deionized water, adding copper nitrate and polydopamine, heating and stirring, adding polyacrylonitrile, stirring and dispersing to move to the reactor, reacting, cooling and filtering, and drying to obtain modified polyacrylonitrile, (S4) dispersing modified graphene oxide filter residue in N,N-dimethylformamide, processing, adding modified polyacrylonitrile, stirring, and spinning to obtain fiber, and (S5) not drying fiber, soaking into filtrate, heating, modifying, taking out, and drying. USE - Preparation method of polyacrylonitrile antibacterial fiber film. ADVANTAGE - The polydopamine is used to modify graphene oxide to increase the specific surface area of graphene oxide and enrich the surface of graphene oxide with functional groups. The surface of the fiber film after spinning is smooth, so that the adhesion of dirt substances is prevented and excellent better antibacterial properties are obtained. DETAILED DESCRIPTION - A preparation method of polyacrylonitrile antibacterial fiber film, involves (S1) adding graphene oxide into deionized water, ultrasonically dispersing, adding polydopamine, stirring at 45-60degreesC for 2-3 hours, adding copper nitrate, stirring to fully dissolve, moving to a high pressure reactor, reacting at 100-120degrees Celsius for 1.5-3 hours, cooling, filtering, washing with deionized water, and drying to obtain modified graphene oxide, (S2) adding chitosan and antibacterial peptide into deionized water, ultrasonically stirring to completely dissolve, adding modified graphene oxide in the step (S1) into the mixed solution, sealing and stirring for 8-12 hours, filtering, and collecting the filtrate and filter residue, (S3) adding citric acid into deionized water, adding copper nitrate and polydopamine, heating and stirring at 50-60degreesC for 10-20 minutes, adding polyacrylonitrile, stirring and dispersing to move to the reactor, reacting at 90-100degrees Celsius for 3-5 hours, cooling and filtering, and drying to obtain modified polyacrylonitrile, (S4) dispersing the modified graphene oxide filter residue obtained in step (S2) in N,N-dimethylformamide, ultrasonically processing for 10 minutes, adding modified polyacrylonitrile obtained in step (S3), ultrasonically stirring at 40-50degreesC, moving to an electrostatic spinning injection pump, and spinning to obtain fiber, and (S5) not drying the fiber obtained in step (S4), soaking into the filtrate in step (S3), heating to 65-80degreesC, modifying for 5-10 hours in the filtrate, taking out the fiber film, and drying at 30-40degreesC to obtain a final product.