▎ 摘　　要

NOVELTY - Preparing a graphene composite electromagnetic shielding film, comprises mixing graphene powder with a dispersing agent, carrying out primary liquid phase ball milling, and controlling the time of the primary liquid phase ball milling to be ≥2 hours to obtain graphene dispersion slurry, mixing the graphene dispersion slurry with a polymer and carrying out secondary liquid phase ball milling to obtain graphene composite slurry and sequentially carrying out defoaming treatment and curing film forming treatment on the graphene composite slurry to obtain the final product. USE - The method is useful for preparing a graphene composite electromagnetic shielding film. ADVANTAGE - The film: has excellent flexibility, electrical conductivity of 618.2 S/m or more, shielding bandwidth of 4.2 GHz, and an electromagnetic shielding effectiveness of 30 dB or more. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene composite electromagnetic shielding film prepared by the above mentioned method.