▎ 摘　　要

NOVELTY - Amidoxime-based modified graphene oxide material, is claimed. The surface of the graphene oxide and its interlayer are grafted with amidoxime-based polymer brush i.e. (Z)-N'-hydroxy-2,4,4-trimethyl-5-oxopentanimidamide compound (I). USE - Used as amidoxime-based modified graphene oxide material. ADVANTAGE - The surface and interlayer of the polymer brush modified graphene oxide: are both branched with amidoxime groups, and a single active site polymer brush has multiple amidoxime functional groups, which greatly improves the adsorption efficiency. The amidoxime group polymerization reaction: is simple and convenient; and has stable grafting rate. The method: utilizes less catalyst; is not sensitive to environmental requirements e.g. oxygen and moisture; and has low cost and controllable graft molecular weight. DETAILED DESCRIPTION - Amidoxime-based modified graphene oxide material, is claimed. The surface of the graphene oxide and its interlayer are grafted with amidoxime-based polymer brush i.e. (Z)-N'-hydroxy-2,4,4-trimethyl-5-oxopentanimidamide compound of formula (I). n = greater than or equal to 2; and R = halogen. An INDEPENDENT CLAIM is also included for preparing amidoxime-based modified graphene oxide material, comprising (i) dispersing the graphene oxide raw material in a solvent to obtain graphene oxide dispersion, where the concentration of graphene oxide dispersion is preferably 15-24 g/l, the dispersion is preferably ultrasonic dispersion for 30-60 minutes, and the solvent is preferably dichloromethane, (ii) mixing the graphene oxide dispersion with 4-dimethylaminopyridine and triethylamine, stirring at 0-5 degrees C for 10-20 minutes, adding halogenated initiator dropwise, stirring at 0-5 degrees C for 48-60 hours to obtain substituted graphene oxide of formula (GO-R) (II), where the rate of dropping the halogenated initiator is preferably 30-60 seconds/drop, the halogenated initiator is preferably 2-bromoisobutyryl bromide, and the mass ratio between halogenated initiator and graphene oxide, triethylamine and 4-dimethylaminopyridine is 3.72-8.37:0.4-0.6:3.5-4.38:0.2-0.3, (iii) dispersing (II) in a solvent, then adding acrylonitrile, copper(II) bromide, tris(2-(dimethylamino)ethyl)amine and vinyl chloride, reacting at 60-70 degrees C for 24-48 hours to obtain graphene oxide-polyacrylonitrile composite material (GOPAN) final product, where the mass ratio between (II), acrylonitrile, copper(II) bromide, tris(2-(dimethylamino)ethyl)amine and vinyl chloride is preferably 0.1-0.15:1.5-4.5:0.0009-0.0018:0.0092-0.0184:0.020-0.