▎ 摘　　要

NOVELTY - Composite material comprises electromagnetic wave absorbing materials, containing two-dimensional graphene sheets, two-dimensional graphene sheet is obtained by crushing the carbon raw material through the cavitation principle in the liquid phase exfoliation method, and is produced by drying in an oven or freeze-drying. USE - Composite material used for electromagnetic wave shielding or electromagnetic wave absorption. ADVANTAGE - Composite material has a good electromagnetic wave shielding or electromagnetic wave absorbing effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method of manufacturing a composite material for electromagnetic wave shielding or electromagnetic wave absorption, which involves fragmentation of the carbon feedstock by cavitation in liquid phase exfoliation to form a graphene suspension and oven-drying or freeze-drying graphene suspension to form an electromagnetic wave absorbing material containing two-dimensional graphene sheets.