Preparation method of ion-imprinted blended membrane

The invention relates to a preparation method of an ion-imprinted blended membrane. The method comprises steps as follows: (1) synthesis of a macromolecular chain transfer agent: the macromolecular chain transfer agent is synthesized from methyl methacrylate and an RAFT reagent in a preset proportion of a thermal initiator; (2) synthesis of an amphiphilic block functional copolymer: the amphiphilic block functional copolymer is synthesized from 4-vinylpyridine, the thermal initiator and the macromolecular chain transfer agent synthesized in the step (1); (3) synthesis of a template ion-high-polymer complex; (4) membrane casting: the template ion-high-polymer complex in the step (3) and a membrane matrix are dissolved in a solvent in a preset proportion and stirred for preset time to be uniformly mixed, a membrane casting solution is obtained, and membrane casting is performed after bubbles are removed from the membrane casting solution; (5) elution. In the membrane forming process, a hydrophilic block can rap