▎ 摘　　要

NOVELTY - Preparing high-strength graphene chemically cross-linked polyacrylamide hydrogel comprises (i) using thionyl chloride to modify the graphene oxide by acid chlorination, placing it in a constant temperature reactor, and heating and reacting at 60-80 degrees C under a nitrogen atmosphere to obtain acyl chloride graphene, (ii) placing 2-azidoethanol and acyl chloride graphene in a constant temperature reactor, and reacting by heating at 80-110 degrees C under a nitrogen atmosphere to obtain graphene azide, and (iii) adding acrylamide and propynyl acrylate to the deionized water solvent in a nitrogen atmosphere, slowly dropping the initiator potassium persulfate, placing it in a thermostat reactor under a nitrogen atmosphere, heating to 50-70 degrees C, reacting for 20-40 minutes, adding crosslinking agent N,N'-methylenebisacrylamide, reacting for 2-4 hours, and then reacting at 25-35 degrees C for 18-36 hours to obtain alkynyl acrylamide hydrogel in side chain. USE - The method is useful for preparing high-strength graphene chemically cross-linked polyacrylamide hydrogel. ADVANTAGE - The method: improves interface force and compatibility between graphene and polyacrylamide hydrogel; avoids the problem of poor dispersion of graphene and prone to agglomeration; and improves the tensile strength and elongation at break of the polyacrylamide hydrogel, so that the polyacrylamide hydrogel exhibits higher mechanical strength and toughness. DETAILED DESCRIPTION - Preparing high-strength graphene chemically cross-linked polyacrylamide hydrogel comprises (i) using thionyl chloride to modify the graphene oxide by acid chlorination, placing it in a constant temperature reactor, and heating the reaction at 60-80 degrees C under a nitrogen atmosphere to obtain acyl chloride graphene, (ii) placing 2-azidoethanol and acyl chloride graphene in a constant temperature reactor, and reacting by heating at 80-110 degrees C under a nitrogen atmosphere to obtain graphene azide, (iii) adding acrylamide and propynyl acrylate to the deionized water solvent in a nitrogen atmosphere, slowly dropping the initiator potassium persulfate, placing it in a thermostat reactor under a nitrogen atmosphere, heating to 50-70 degrees C, reacting for 20-40 minutes, adding crosslinking agent N,N'-methylenebisacrylamide, reacting for 2-4 hours, and then reacting at 25-35 degrees C for 18-36 hours to obtain alkynyl acrylamide hydrogel in side chain, (iv) adding side chain alkynyl acrylamide hydrogel and graphene azide to the N,N-dimethylformamide solvent, uniformly dispersing, adding catalyst and ligand and reacting at 40-60 degrees C for 24-48 hours in nitrogen atmosphere to obtain high-strength graphene chemically cross-linked polyacrylamide hydrogel.