▎ 摘　　要

NOVELTY - Preparation of stainless steel-based electromagnetic shielding material involves (S1) adding 100 pts. wt. mercapto graphene and 500-2000 pts. wt. epoxy-modified silicone oil to N,N-dimethylformamide, add 40-150 pts. wt. tetrabutyl ammonium fluoride catalyst, reacting at 50-80 °C for 12-36 hours, filtering the solvent, washing with N,N-dimethylformamide, deionized water and ethanol to obtain silicone oil grafted graphene, (S2) mixing 100 pts. wt. silicone rubber, 2-4 pts. wt. dicumyl peroxide, silicone oil grafted graphene, and stainless steel fibers in a mixer and placing the materials in a flat vulcanizer for compression molding. USE - Preparation of stainless steel-based electromagnetic shielding material e.g. paint and cover. ADVANTAGE - The method produces stainless steel-based electromagnetic shielding material using silicone oil grafted graphene and stainless steel fiber as a composite absorbent and silicone rubber as a matrix, in which the graphene is grafted and modified with silicone oil such that the molecular chain containing polysiloxane has excellent compatibility with silicone rubber, and graphene nanoparticles can be uniformly distributed in the silicone rubber matrix during mixing process to form a micro-conductive path with excellent dielectric loss performance, using graphene and stainless steel fiber as a composite absorbent, absorbing and losing electromagnetic waves through dielectric loss and magnetic loss. The lightweight shielding material has a low density, strong electromagnetic shielding performance and wide absorption frequency band.