▎ 摘　　要

NOVELTY - Preparation of graphene electromagnetic shielding film comprises taking lithium fluoride and hydrochloric acid, stirring, adding titanium-aluminum carbide powder, stirring, centrifuging, washing, adding deionized water, dispersing, and centrifuging; mixing graphene and deionized water, taking poly(methyl methacrylate) microsphere dispersion, adding graphene dispersion, stirring, centrifuging, drying, taking two-dimensional titanium carbide dispersion and coated microspheres, stirring, adding Nafion solution, stirring, calcining, and cooling; taking silver nanowires, shielding fillers and ethanol, dispersing, taking glass template, applying dip coating, drying, taking polyethylene terephthalate base layer, coating with a polyvinyl alcohol solution, drying, attaching to the silver nanowire film, hot pressing, and transferring to polyvinyl alcohol layer; and taking polyvinyl alcohol, polystyrene sulfonic acid and deionized water, stirring, applying to silver nanowire film, and drying. USE - The method is used for preparing graphene electromagnetic shielding film. ADVANTAGE - The film has excellent electromagnetic shielding effect, high transparency, and excellent silver nanowire stability. DETAILED DESCRIPTION - Preparation of graphene electromagnetic shielding film comprises: (A) taking lithium fluoride and hydrochloric acid, mixing and stirring until dissolved, adding titanium-aluminum carbide powder, mixing, stirring at 40-45degreesC for 40-50 hours, collecting the product by centrifugation, washing with deionized water until neutral, adding deionized water, ultrasonic dispersing in an ice-water bath, and centrifuging; (B) mixing graphene and deionized water, taking poly(methyl methacrylate) microsphere dispersion, adding graphene dispersion, stirring, centrifuging, vacuum drying, taking two-dimensional titanium carbide dispersion and the coated microspheres, mixing and stirring, adding Nafion solution, stirring, calcining at high temperature, and cooling; (C) taking silver nanowires, shielding fillers and ethanol solution, ultrasonically dispersing to obtain a dip coating solution, taking glass template with a preset pattern, applying dip coating solution on the surface of the glass template by pulling method, drying, taking polyethylene terephthalate base layer, coating with a polyvinyl alcohol aqueous solution, vacuum drying, attaching to the silver nanowire film, hot pressing, and transferring the silver nanowire film to the surface of the polyvinyl alcohol layer; and (D) taking polyvinyl alcohol, polystyrene sulfonic acid and deionized water, mixing and stirring, applying to the upper surface of the silver nanowire film, and vacuum drying. An INDEPENDENT CLAIM is also included for electromagnetic shielding film.