▎ 摘　　要

NOVELTY - Preparing aqueous absorption type electromagnetic shielding coating material, comprises (1) mixing graphene nanosheets-polydopamine with aqueous anionic polyacrylate latex, coating on solid substrate, and drying to obtain polyacrylate/graphene nanosheets-polydopamine composite coating with thickness of 0.2-0.45 mm; (2) reducing graphene oxide under vacuum condition to obtain reduced graphene oxide, and blending reduced graphene oxide and aqueous anionic polyacrylate latex to obtain polyacrylate/reduced graphene oxide composite latex; and (3) coating polyacrylate/reduced graphene oxide composite latex on the polyacrylate/graphene nanosheets-polydopamine composite coating, and drying to obtain aqueous absorption type electromagnetic shielding coating material, where the polyacrylate/reduced graphene oxide coating with thickness of 1.3-2.2 mm. USE - The method is useful for preparing aqueous absorption type electromagnetic shielding coating material. ADVANTAGE - The method constructs the double-layer structure of the wave absorbing layer-reflecting wave absorbing layer, effectively exerts the wave absorbing ability of the bottom material, improves the impedance matching of the material, broadens the absorbing frequency width of the material, and realizes the full absorption shielding of the X wave band. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for aqueous absorption type electromagnetic shielding coating material, prepared as mentioned above, where the electromagnetic wave reflectivity of the absorbing electromagnetic shielding coating material in the X wave band is less than 0.5, and the shielding efficiency is greater than 20 dB.