Preparation method of molecular imprinted polymer membrane by means of grafting rejection

Abstract

The invention provides a preparation method of a molecular imprinted polymer membrane by means of grafting rejection. The preparation method comprises the following steps of: preparing a solution of a complex of a functional monomer, a cross-linking agent and a template in a proper proportion, filtering the complex solution by selecting a proper support membrane to reject the complex formed from the functional monomer and the template on the surface of the membrane, selectively filtering out and washing off the functional monomer which does not react with the template to form the stable complex by use of a solvent, grafting a layer of molecular imprinted polymer on the surface of the membrane by means of radiation initiation, and removing the template and an unreacted substance by means of backwashing to obtain the surface grafted molecular imprinted polymer membrane. The molecular imprinted polymer membrane not only keeps the quite large flux and mechanical performance of a carrier membrane, but also is conductive to the elution and recombination of the template, and therefore has excellent application prospect in the fields of chemical separation, solid phase extraction, membrane sensors and the like; the obtained MIP (Molecular Imprinted Polymer) membrane is quite high in imprinting efficiency.

Description

technical field

[0001] The invention relates to a method for preparing a molecularly imprinted polymer membrane by intercepting grafting, and belongs to the fields of functional materials, polymer materials and membranes. Background technique

[0002] Molecularly imprinted polymer (MIP) is a new type of polymer material, which has high specific recognition ability for specific target molecules. Imprinted polymer membranes combine the advantages of membrane separation and molecular imprinting technologies, and endow the membrane with specific molecular recognition, affinity and selective permeability, so it has become a research hotspot in recent years. The synthesis of molecularly imprinted polymer membranes mainly includes the following methods [Macromol Biosci, 2003, 3(9): 487-498]: (1) in-situ polymerization: the imprinted molecules, functional monomers, cross-linking agents and porogenic The agent mixture is poured between two substrates, and the MIP film is obtained by...