▎ 摘　　要

NOVELTY - Preparing amino-rich polyacrylonitrile-based nanocomposite fiber film involves mixing N,N dimethylformamide dispersion of graphene oxide and the N,N-dimethylformamide solution of hyperbranched polyethyleneimine, performing amidation reaction to obtain graphene oxide hyperbranched polyethylene imine, dissolving polyacrylonitrile in the dispersion of graphene oxide hyperbranched polyethyleneimine for electrostatic spinning, obtaining polyacrylonitrile-based nano composite fibre film, adding the polyacrylonitrile-based nanocomposite fiber membrane to the ethylene glycol solution of hyperbranched polyethyleneimine for graft modification to obtain the amine-rich polyacrylonitrile-based nanocomposite fiber membrane. USE - Method for preparing amino-rich polyacrylonitrile-based nanocomposite fiber film used for removing and recycling gold (claimed) ADVANTAGE - The mechanical strength and active sites of the polyacrylonitrile electrospinning fiber film are improved by adding graphene oxide. The modification of alkenes by hyperbranched polyethyleneimine avoids its stacking in the polyacrylonitrile matrix and improves its dispersion. The protonated amine group under acidic conditions can also interact with tetrachloroaurate, adsorption is carried out by electrostatic adsorption and portion of the gold is reduced to simple gold to realize recovery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an amino-rich polyacrylonitrile-based nanocomposite fiber film.