Magnetic chitosan composite microsphere surface imprinted adsorbent and preparation method thereof

Abstract

The invention provides a magnetic chitosan composite microsphere surface imprinted adsorbent and a preparation method thereof; the imprinted adsorbent contains nanoscale magnetic particles and chitosan physically coating the surface of the magnetic particles; firstly, magnetic chitosan composite microspheres are prepared by an emulsion crosslinking polymerization reaction, the nanoscale magnetic particles are wrapped inside the magnetic chitosan composite microspheres, and then an imprinted polymer is wrapped on the surface of the magnetic chitosan composite microspheres by a precipitation polymerization reaction. The surface imprinted adsorbent has the advantages of fast adsorption kinetics properties, relatively high adsorption capacity, fast magnetic separation efficiency and obvious chloramphenicol molecular recognition properties, and can be used for chloramphenicol selective recognition, separation and enrichment in the environment. The preparation method has the advantages of simple process, uniform particle size of the synthetic product, easy controlled temperature, easy separation of the product and the like.

Description

Technical field [0001] The invention belongs to the field of environmental functional materials, in particular to a magnetic chitosan composite microsphere surface imprinting adsorbent and a preparation method thereof. Background technique [0002] Molecular imprinting technology is to simulate the molecular recognition of antibodies and antigens in nature, and use target molecules as template molecules to prepare molecular imprinted polymers that have specific and selective recognition functions for template molecules. Valence, non-covalent and semi-covalent functional monomers polymerize with cross-linking agent around template molecules to form a three-dimensional cross-linked polymer network. After the template molecule is removed by extraction and other methods, an imprinted polymer with special affinity and recognition pores for the template molecule is obtained. Surface molecular imprinting technology, by establishing molecular recognition sites on the surface of the matr...

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Problems solved by technology

[0005] In order to solve the problem that the residue of chloramphenicol in the environment is not easy to detect, the present invention provides a magnetic chitosan with selective recognition performance for chloramphenicol, which can be used to identify, separate and enrich chloramphenicol in complex environments Sugar composite microsphere surface imprinted adsorbent and preparation method thereof

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