Preparation method of monolithic poly(aryl ether sulfone ketone) bipolar membrane with side chain containing phthalocyanine water dissociation catalytic group

A polyaryl ether sulfone ketone, bipolar membrane technology, applied in chemical instruments and methods, membrane, membrane technology and other directions, can solve the problem of low chemical stability and thermal stability of functional groups, limited scope of use, and monomer utilization. problems such as low rate, achieve good economic benefits and promotion value, improve stability and service life, and save the effect of film forming process

Inactive Publication Date: 2020-08-07
FUJIAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Preparation method of monolithic poly(aryl ether sulfone ketone) bipolar membrane with side chain containing phthalocyanine water dissociation catalytic group
  • Preparation method of monolithic poly(aryl ether sulfone ketone) bipolar membrane with side chain containing phthalocyanine water dissociation catalytic group
  • Preparation method of monolithic poly(aryl ether sulfone ketone) bipolar membrane with side chain containing phthalocyanine water dissociation catalytic group

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Take 5.0g of bromomethylated polyarylether sulfone ketone and add it to a three-necked flask, dissolve it with 60mL of N-methylpyrrolidone, then add 1.7g of potassium ethyl xanthate to the reaction solution, and stir at room temperature After 10 hours, a macromolecular chain transfer agent (PPBESK-JCTA) was prepared. After the reaction, deionized water was used as a precipitant to precipitate the product, soaked to remove unreacted potassium ethyl xanthate, and dried at 75°C for use.

[0038]

[0039] (2) Weigh 5.0g PPBESK-JCTA into the three-necked bottle, measure 60mL of NMP in the three-necked bottle, continue to pass nitrogen gas (remove oxygen) for 30min, wait until PPBESK-JCTA is completely dissolved, heat up to 70°C, massage Ratio PPBESK-JCTA (based on moles of dithioesters in the molecular chain): Vinylphenyl glycidyl ether (GST): AIBN = 1:30:0.5 Add GST and AIBN and react at constant temperature for 10 hours. After the reaction, the reaction solution was...

Embodiment 2

[0053] (1) Take 5.0g of bromomethylated polyarylether sulfone ketone and add it to a three-necked flask, dissolve it with 60mL of N-methylpyrrolidone, then add 1.7g of potassium ethyl xanthate to the reaction solution, and stir at room temperature 10h, prepare a macromolecular chain transfer agent (PPBESK-JCTA). After the reaction, use deionized water as a precipitant to precipitate the product, soak to remove unreacted potassium ethyl xanthate, and dry at 75°C for use.

[0054]

[0055] (2) Weigh 5.0g PPBESK-JCTA into the three-necked bottle, measure 60mL of NMP in the three-necked bottle, continue to pass nitrogen gas (remove oxygen) for 30min, wait until PPBESK-JCTA is completely dissolved, heat up to 70°C, massage Ratio PPBESK-JCTA (based on moles of dithioester in the molecular chain): glycidyl methacrylate (GMA): AIBN = 1: 40: 0.5 Add GST and AIBN, and react at constant temperature for 24 hours. After the reaction, the reaction solution was precipitated with ethanol, ...

Embodiment 3

[0065] (1) Weigh 5.0g polyaryl ether sulfone ketone macromolecular transfer agent (PPBESK-JCTA) into the three-necked bottle, measure 60mL of NMP in the three-necked bottle, continue to pass nitrogen for 30min (remove oxygen), wait for PPBESK- JCTA is completely dissolved, and the temperature is raised to 70°C. Add GST and AIBN at a molar ratio of PPBESK-JCTA (in terms of moles of dithioesters in the molecular chain):vinylphenyl glycidyl ether (GST):AIBN=1:30:0.5 , constant temperature reaction 20h. After the reaction, the reaction solution was precipitated with ethanol, and the precipitate was soaked in flowing water for 24 hours, NMP, unreacted monomer and initiator in the precipitate were removed, filtered, and dried to obtain a solid. The dried polyarylether sulfone ketone graft polymer was dissolved in tetrahydrofuran and cast on a glass plate to form a film, and dried in a constant temperature oven at 80°C for 24 hours to obtain polyarylether sulfone ketone-g-vinylbenzen...

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Abstract

The invention relates to a preparation method of a monolithic polyether sulfone ketone bipolar membrane with a side chain containing a phthalocyanine water dissociation catalytic group. The preparation method comprises the steps: respectively synthesizing a poly(aryl ether sulfone ketone) copolymer and a poly(aryl ether sulfone ketone) polymer by taking bromo-methylated poly(aryl ether sulfone ketone), an epoxy group-containing substituent monomer and bipyridine as starting raw materials, mixing, casting on a glass plate, and drying to prepare a poly(aryl ether sulfone ketone) base membrane containing phthalocyanine side chains; and sulfonating, aminating and quaternizing the base membrane, and washing with deionized water to obtain the monolithic phthalocyanine-containing poly(aryl ethersulfone ketone) bipolar membrane. According to the bipolar membrane prepared by the method, a monomer side chain with an epoxy group is introduced and grafted on a poly(aryl ether sulfone ketone) sidegroup through reversible addition-fragmentation chain transfer polymerization, and the molecular weight of the side chain with the epoxy group is controllable. The prepared bipolar membrane has a self-catalysis effect, and is low in resistance and low in transmembrane voltage. After long-term use, the problems of bubbling, cracking and the like of a middle interface layer of a compound bipolar film, which are easily caused in the use process of the composite bipolar membrane, can be avoided.

Description

technical field [0001] The invention relates to a method for preparing a monolithic polyaryl ether sulfone ketone bipolar membrane containing a phthalocyanine water dissociation catalytic group in the side chain, in particular to a method for grafting polyaryl ether sulfone ketone containing The epoxy group side chain, through the further reaction of the epoxy group, introduces the phthalocyanine group into the side chain of the polyarylethersulfone ketone as the water dissociation catalyst of the middle layer of the bipolar membrane, and synthesizes a monolithic polymer containing the phthalocyanine group. The preparation method of aryl ether sulfone bipolar membrane. Background technique [0002] Bipolar membrane is a new branch developed on the basis of ion exchange membrane technology, and has rapidly developed into a research hotspot in the field of membrane technology. It is usually a functional membrane with a three-layer structure composed of an anion exchange layer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/66B01D67/00B01D69/02B01D61/44
CPCB01D61/445B01D67/0006B01D69/02B01D71/66B01D2325/10
Inventor 黄雪红宁金凤张睫灵贾玉婷李晓燕丁富传
Owner FUJIAN NORMAL UNIV
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