▎ 摘　　要

NOVELTY - An epoxy resin based electromagnetic shielding composite material comprises 0.1 pt. wt. polyvinyl alcohol, 0.45-0.55 pts. wt. graphene oxide, 9-23 pts. wt. graphene microchips, 60.4-71.4 pts. wt. epoxy resin and 16-19 pts. wt. curing agent. USE - Epoxy resin based electromagnetic shielding composite material. ADVANTAGE - The epoxy resin based electromagnetic shielding composite material forms effective conductive path in the epoxy resin matrix, provides a stable three-dimensional network porous structure, improves multiple absorption, reflection and internal scattering of incident electromagnetic waves, and improves the electromagnetic shielding performance of the epoxy-based electromagnetic shielding composite material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of epoxy resin based electromagnetic shielding composite material, which involves mixing polyvinyl alcohol, graphene oxide, graphene microchips and water, ultrasonically reacting and stirring to obtain reaction material, freeze-drying of reaction material and subjecting to a thermal reduction reaction to obtain binary hybrid three-dimensional network porous graphene, casting a mixture of epoxy resin and curing agent into the binary hybrid three-dimensional network porous graphene, defoaming and solidifying.