▎ 摘　　要

NOVELTY - Preparing graphene oxide modified polyacrylic acid hydrogel composite material comprises (i) dispersing graphene oxide ultrasonically in toluene solvent, stirring, adding 1,3,5-triacyl chlorobenzene for acid chloride reaction, filtering, washing and drying to obtain acyl chloride graphene; (iii) adding the acyl chloride graphene, tert-butyl hydroperoxide and pyridine into the ether solvent one by one to carry out the peroxidation reaction, filtering, washing and drying to obtain tert-butyl graphene peroxide; and (iii) using acrylic acid as monomer and N,N-methylenebisacrylamide as crosslinking agent, stirring uniformly with tert-butyl graphene peroxide in a nitrogen environment and carrying out polymerization reaction. USE - The method is useful for preparing graphene oxide modified polyacrylic acid hydrogel composite material. ADVANTAGE - The method: utilizes the excellent mechanical strength and super adsorption capacity of graphene oxide; produces polyacrylic acid hydrogel with high mechanical strength and strong methylene blue adsorption capacity; avoids the shortcomings of graphene oxide that is difficult to recycle; and can chemically cross-link active groups on the surface of graphene oxide with the polyacrylic acid hydrogel, so that the graphene oxide is bound to the internal structure of the hydrogel thus can absorb more water molecules and methylene blue molecules and adsorbs a part through the interaction with methylene blue, which solves the problem of difficult recovery.