Amine-fluorine dual-functional hydrogel adsorbent and its preparation and application

By introducing quaternary ammonium olefinic monomers and fluorine-containing olefinic monomers into the amination adsorbent, the amine-fluorine-bifunctional hydrogel adsorbent is solved, and the problem of amine groups being disturbed by anions in water in the prior art is achieved, and the efficient selective removal of PFAS and the improvement of adsorption capacity is achieved.

CN118949949BActive Publication Date: 2025-03-28SHANGHAI JIAOTONG UNIV
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Patent Information

Application Number
CN202411249441.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-06
Publication Date
2025-03-28
Estimated Expiration
2044-09-06

AI Technical Summary

Technical Problem

The amine groups of existing amination adsorbents are easily affected by coexisting anions in water, resulting in the inability to achieve selective adsorption, thereby reducing the adsorption efficiency and adsorption capacity.

Method used

The preparation method of amine-fluorobifunctional hydrogel adsorbent is adopted. By introducing quaternary ammonium olefin monomers and fluoroene monomers, a porous structure with interpenetrating hydrophilic amine and hydrophobic fluorobial networks is formed to enhance the targeted adsorption ability of PFAS.

Benefits of technology

It realizes efficient selective removal of PFAS, improves the adsorption capacity and adsorption capacity of adsorbents in complex water bodies, and effectively solves the problem of coexisting anion interference in water.

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Abstract

The present invention relates to the technical field of pollutant treatment, and specifically to an amine-fluorine bifunctionalized hydrogel adsorbent and its preparation and application. The present invention provides a method for preparing an amine-fluorine bifunctionalized hydrogel adsorbent, comprising: mixing and stirring a fluorine-containing olefin monomer, a quaternary ammonium salt olefin monomer, a Chinese medicine residue cellulose dispersion, N,N′-methylenebisacrylamide and ammonium persulfate, and sequentially performing a heating reaction, deionized water swelling, and drying to obtain an amine-fluorine bifunctionalized hydrogel adsorbent. The present invention introduces a quaternary ammonium salt olefin monomer as a hydrophilic monomer and a fluorine-containing olefin monomer as a hydrophobic monomer, so that the amine-fluorine bifunctionalized hydrogel adsorbent has a porous structure of a hydrophilic amine and a hydrophobic fluorine double network interpenetrating, and the structure strengthens water transmission and the mass transfer rate of perfluorinated compounds.
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