A preparation method of monolithic polyaryl ether sulfone ketone bipolar membrane containing phthalocyanine water dissociation catalytic group

Abstract

The invention relates to a preparation method of a monolithic polyaryl ether sulfone ketone bipolar membrane containing a phthalocyanine water dissociation catalytic group. The present invention uses methoxy bisphenol, non-methoxy bisphenol, dihalobenzophenone, and dihalodiphenyl sulfone as starting materials to catalyze the synthesis of PPBESK‑EG and Pc‑PPBESK, mix them and cast them on glass After sulfonation, ammonization and quaternization, the plate is washed with deionized water to obtain a monolithic polyaryl ether sulfone ketone bipolar membrane containing phthalocyanine water dissociation catalytic groups. The bipolar membrane prepared by the present invention introduces methoxy groups into the molecular chain of polyarylether sulfone ketone through polycondensation reaction, reacts with boron tribromide to obtain hydroxyl-containing polyarylether sulfone ketone, and then reacts with epichlorohydrin to form a polyaryl ether sulfone ketone. The epoxy group is introduced into the side group of the polyarylethersulfone ketone, which saves the film-forming process and avoids the use of the carcinogen chloromethyl ether. The prepared bipolar membrane has self-catalysis, and the resistance and transmembrane voltage of the bipolar membrane are low. There will be no problems such as bubbling and cracking in the intermediate interface layer after long-term use.

Description

technical field [0001] The invention relates to a preparation method of a monolithic polyaryl ether sulfone ketone bipolar membrane containing a phthalocyanine water dissociation catalytic group, in particular to introducing a substituent containing an epoxy group on the polyaryl ether sulfone ketone main chain, phthalocyanine It reacts with epoxy groups and introduces it into the molecular structure of polyarylether sulfone ketone. Phthalocyanine-containing polyarylether sulfone ketone and epoxy group-containing polyarylether sulfone ketone are blended to form a film as a base film material, and anions and cations are introduced on both sides of the base film through reaction of epoxy groups to synthesize a monolithic film containing phthalocyanine group The preparation method of polyaryl ether sulfone ketone bipolar membrane. Background technique [0002] Bipolar membrane is a new branch developed on the basis of ion exchange membrane technology, and has rapidly developed...

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Problems solved by technology

This method also has several obvious disadvantages: first, the grafting rate is low, and the grafting uniformity is also poor; second, because the porous material is used as the base membrane, the grafted monomers on both sides avoid mutual penetration, and the bipolar membrane The middle interface layer is not clear; the third is that the method of co-radiation grafting will cause a large amount of monomers to self-polymerize, and the utilization rate of the monomers is very low, which is not suitable for industrial production; the fourth is to achieve the required grafting rate. The grafted membrane is cleaned and grafted again (similar to the above-mentioned U.S. patent soaking the monomer solution multiple times and polymerizing), so that the synthesis steps are increased; the fifth is affected by the grafted monomer, the bipolar membrane prepared in the paper, Regardless of its positive or negative side, the chemical stability and thermal stability of its functional groups with ion exchange capabilities are not high, thus greatly limiting its scope of use

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