Copper (II) ion surface imprinted polymer and preparation method thereof

Abstract

The invention provides a copper (II) ion surface imprinted polymer supported by polystyrene. The copper (II) ion surface imprinted polymer is prepared by using an unsaturated quaternary ammonium cation modified salicylaldoxime copper (II) complex as a functional monomer and polyene propyl ammonium salt as a cross-linking agent through copolymerization of framework monomers on the acryloyl polystyrene surface; the imprinted polymer is used as a solid phase imprinted two-position extracting agent of copper (II) and is used for selective enrichment and separation of copper (II) ions in each watersystem; the characteristic and the function of simultaneously extracting counterbalancing anions are realized. An effective method is provided for removing copper (II) ions in various water systems and realizing the auxiliary detection, separation and enrichment of copper (II) ions in various water systems; the copper (II) ion surface imprinted polymer can show the foam, diaphragm plate, filamentor particle forms.

Description

technical field [0001] The present invention relates to an imprinted polymer, in particular to a copper (II) ion surface imprinted polymer, which uses unsaturated quaternary ammonium cation-modified salicylaldoxime copper (II) complexes as functional monomers, polyallyl Ammonium salt is a cross-linking agent, which is prepared by copolymerization reaction with the skeleton monomer on the surface of polystyrene. It is used as a solid-phase imprinted double-position extraction agent for copper (II) in various water systems. The selective enrichment and extraction separation of the invention has the function and characteristics of simultaneously extracting counter anions, and belongs to the field of functional polymer materials. Background technique [0002] The extraction and separation of copper(II) ions in water systems today mainly use liquid-liquid extractant 5-alkyl salicylaldoxime and its complexes. The copper-iron separation coefficient is as high as 450-550, the extrac...

AI Technical Summary

Problems solved by technology

But the weak point of 5-alkyl salicylaldoxime is that when 5-alkyl salicylaldoxime copper (II) chelate concentration is higher, precipitation occurs easily; A small amount of emulsion appears, and the oil-water two-phase chromatographic separation takes a long time, which leads to complex and changeable hydrometallurgy process control, harsh production environment, and serious waste pollution.

The ionic bonds and coordinate bonds between the polymerizable ligands or chelating ligands and transition metal ions have stronger forces than hydrogen bonds, van der Waals forces, hydrophobic interactions, etc., and the chelating orientation is strong. Conducive to the preparation of imprinted polymers with high selectivity and stable imprinting function; the recognition process through coordination has the advantages of fast and reversible binding; the coordination between metal ions and ligands or chelating ligands has good thermodynamics stability, it is relatively easy to achieve dynamic equilibrium, and has a wide range of applications; however, since most of the crosslinking agents used are ethylene glycol diacrylate or bisacrylamide methane, etc., the ion-imprinted polymer materials made in acid-base aqueous solution It is prone to hydrolysis reaction, causing the ion imprinted polymer material to lose its proper stability and cannot be recycled for a long time

At the same time, ion-imprinted polymer materials have fewer imprinted sites and smaller saturated adsorption capacity; ion-imprinted particles have deep pores, and the diffusion resistance of template ions close to the recognition site is large, which prolongs the equilibrium ion exchange time of ion-imprinted polymer materials

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