▎ 摘　　要

NOVELTY - Producing a porous composite hydrogel comprises mixing a vinyl-based monomer and a crosslinking agent, adding a carbon-based material to the mixture, and forming a porous composite hydrogel by adding an initiator to the mixture to which the carbon-based material is added to perform a polymerization reaction. USE - The composite hydrogel is useful for electromagnetic interference shielding. ADVANTAGE - The composite hydrogel has pore network structure in which a composite of a polymer and a carbon-based material is interconnected in three dimensions which can be prepared by a simple method, can be used as an EMI shielding material with excellent mechanical and electrical properties, has corrosion resistance, maintains porosity even when exposed to acidic solutions, and can significantly improve EMI shielding performance when exposed to acidic solutions, and is suitable for use as an EMI shielding material and can be usefully used in electronic communication stealth technology and aviation for suppressing EM radiation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for porous composite hydrogel for electromagnetic interference (EMI) shielding, prepared by method and having a porosity of 8-45%.