Pyrethroid insecticide molecularly imprinted polymer and its preparation method and application

Abstract

The invention discloses a pyrethroid insecticide molecular imprinting polymer as well as a preparation method and an application thereof. Pyrethroid is taken as a template molecule, 1,3,5-tris(4-aminophenyl)benzene and 2,4,6-triformylphloroglucinol are taken as functional monomers, amidogen and a formyl group are subjected to a condensation reaction in a pore-foaming agent, a polymer with the template molecule is obtained, the template molecule is eluted, and the pyrethroid insecticide molecular imprinting polymer can be obtained. The molecular imprinting polymer adopting the stereo structure is obtained for the first time through a chemical reaction, damage of free radical polymerization to alkence double bonds is prevented, and carbon and nitrogen double bonds are formed, so that the bonding strength of a target molecule and the polymer is increased. The prepared molecular imprinting polymer has high specific selectivity and good adsorption performance.

Description

technical field [0001] The invention belongs to the technical field of separation and analysis, and in particular relates to a preparation method and application of a molecularly imprinted polymer for detecting pyrethroid insecticides. Background technique [0002] Pyrethroids are a class of broad-spectrum insecticides that can control a variety of pests. Because pyrethroids have a wide spectrum of insecticidal properties, good quick-acting properties, and low toxicity, they played an important role in the control of pests in the early days. important role. Since the use of highly toxic organophosphorus pesticides was banned, pyrethroid insecticides have been used more widely, but at the same time, they have also brought problems such as environmental pollution and food and drug safety, and are listed as pesticide residues in agricultural products and traditional Chinese medicinal materials Focus on detecting objects. Therefore, in order to meet the requirements of food an...

AI Technical Summary

Problems solved by technology

[0004] Traditional molecularly imprinted polymers include bulk polymerization, in-situ polymerization, suspension polymerization, emulsion polymerization, swelling polymerization and surface polymerization. The reaction principle of these polymerization methods is the free radical polymerization of olefin monomers, and the raw materials usually require template molecules, functional Monomers, cross-linking agents, initiators and porogens. Therefore, in the preparation of molecularly imprinted polymers, it is necessary to consider how to select functional monomers and cross-linking agents for template molecules. Usually, the cross-linking agent that uses the cross-linking agent has only bifunctional groups. Therefore, only two-dimensional polymers can be formed, but the technology of selectively detecting the content of pyrethroid insecticides in Chinese medicinal materials using molecularly imprinted covalent organic framework polymers has not been reported