▎ 摘　　要

NOVELTY - Preparing magnetic porous composite material with wide glass transition temperature range comprises e.g. (i) dispersing graphene oxide ultrasonically in water; (ii) adding carbon nanotubes into the graphene oxide dispersion, carrying out ultrasonic dispersion, adding polyacrylamide, carrying out ultrasonic dispersion , drying, heating and preserving ; (iii) adding Span 80 (RTM: Nonionic emulsifier) and carbon nano-graphene oxide hybrid material as a co-stabilizer and monomer as the oil phase, utilizing graphene oxide/ferrous ion aqueous solution as the aqueous phase and adding aqueous phase dropwise into the oil phase; (iv) adding aqueous-in-oil pickering emulsion obtained in step (iii) into a stainless steel polymerization kettle, sealing and heating; (v) adding aqueous ammonia water into the stainless steel polymerization kettle described in step (iv), adjusting the pH of the system to 11, sealing and heating; and (vi) freeze drying product obtained in step (v). USE - The magnetic porous composite material with wide glass transition temperature range is useful for electromagnetic wave shielding and absorption. ADVANTAGE - The method: is simple and utilizes economical, high performance and environmentally-friendly, three-dimensional macroscopic morphology with controllable pore structure and adjustable magnetic properties raw material which is easy to make composite materials with different shapes. DETAILED DESCRIPTION - Preparing magnetic porous composite material with wide glass transition temperature range comprises (i) dispersing graphene oxide ultrasonically in water to obtain a graphene oxide dispersion liquid; (ii) adding carbon nanotubes into the graphene oxide dispersion obtained in step (i), carrying out ultrasonic dispersion, adding polyacrylamide, carrying out ultrasonic dispersion continuosly , drying to constant weight under nitrogen protection, heating sample to 240 degrees C and preserving for 1.5 hours to obtain a hydrophobic carbon nanotube-graphene oxide hybrid material; (iii) adding Span 80 (RTM: Nonionic emulsifier) and carbon nano-graphene oxide hybrid material as a co-stabilizer and monomer as the oil phase, utilizing graphene oxide/ferrous ion aqueous solution as the aqueous phase, where pH value of aqueous phase 3-6, adding aqueous phase dropwise into the oil phase, and carrying out ultrasonic dispersion to obtain aqueous-in-oil pickering emulsion; (iv) adding aqueous-in-oil pickering emulsion obtained in step (iii) into a stainless steel polymerization kettle, sealing, heating to 65-75 degrees C and holding for 6 hours to obtain a porous polymer framework material; (v) adding aqueous ammonia water into the stainless steel polymerization kettle described in step (iv), adjusting the pH of the system to 11, sealing, heating to 90 degrees C, and holding for 8.5 hours; and (vi) freeze drying product obtained in step (v) for 24 hours.