▎ 摘　　要

NOVELTY - Aqueous epoxy resin electromagnetic shielding coating with silver-copper nanowires/reduced graphene oxide (Ag-Cu NWs/rGO) as conductive layer, where the coating is a bottom layer, a middle layer and a surface layer. The bottom layer is aqueous epoxy resin. The middle layer is Ag-Cu NWs/GO conductive layer. The surface layer is aqueous epoxy resin coating. The silver in Ag-Cu NWs/GO conductive layer is granularly dispersed on copper nanowire, and then randomly dispersed with the graphene oxide in the form of a blend, without the occurrence of agglomeration and sedimentation. USE - The coating is used as light non-magnetic high electromagnetic shielding coating material. ADVANTAGE - The coating has thickness of 0.06-0.12 mm and electromagnetic shielding performance of 5.73-23.25 dB. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the aqueous epoxy resin electromagnetic shielding coating, comprising (i) mixing aqueous epoxy resin and curing agent uniformly, where the ratio of aqueous epoxy resin and curing agent is 15:4, (ii) stirring sodium nitrate and concentrated sulfuric acid in ice water bath at 0-5degreesC, slowly adding crystalline flake graphite, continuously stirring for 12-24 hours, slowly adding potassium permanganate in the ice water bath, heating to 35-45degreesC, reacting for 24-48 hours, washing the product with hydrogen peroxide solution, then, respectively washing with hydrochloric acid and ethanol, dialyzing, freeze drying to obtain graphene oxide powder, where the mass ratio of the concentrated sulfuric acid, sodium nitrate, crystalline flake graphite and potassium permanganate is 84.64:1:2:6, (iii) dissolving 0.05 g ferric trichloride in100 ml deionized water, taking 4 ml ferrictri chloride solution, 1.4 g octadecylamine and 0.2 g copper chloride dihydrate, adding 0.1 g glucose into 100 ml water, stirring uniformly at a rotating speed of 500-600 revolutions/minute, pouring into 200 ml hydrothermal kettle, reacting for 10-20 hours at 140-150degreesC, centrifuging and washing with 5% sulfuric acid to collect the precipitate as copper nanowire, (iv) dispersing 0.03 g coppernanowires and 0.018 mol polyvinylpyrrolidone in 100 ml water, stirring uniformly, adding 0.0425 g silver nitrate, stirring for 10-20 hours at room temperature, heating to 80-95degreesC and stirring for 1-2 hours, centrifuging, and freeze-drying to obtain silver-copper nanowires, (v) placing 25 ml aqueous dispersion of graphene oxide on magnetic stirrer, stirring at a rotating speed of 500-600 revolutions/minute, ultrasonically dispersing the Ag-Cu NWs in 5 ml ethanol, gradually adding to the aqueous dispersion of GO, and stirring for 1-2 hours to obtain Ag-Cu NWs/GO conductive coating paste, (vi) coating a layer of aqueous epoxy resin coating on polyethylene terephthalate substrate as bottom layer, drying at 40-60degreesC, scraping and coating Ag-Cu NWs/GO conductive coating for at least one time to form many layers of Ag-Cu NWs/GO conductive layer, drying, and coating a layer of aqueous epoxy resin coating as the surface layer, and (vii) placing the dried coating in hydroiodic acid/ethanol solution, soaking for 12-15 hours at 70-80degreesC. (2) using method of aqueous epoxy resin electromagnetic shielding coating with Ag-Cu NWs/rGO as conductive layer, comprising coating on the surface of the substrate, where the substrate is plastic, steel or glass solid material. DESCRIPTION OF DRAWING(S) - The drawing shows a preparation flow chart of Ag-Cu NWs/rGO aqueous epoxy resin electromagnetic shielding coating (Drawing includes non-English language text).