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Imidazole-type hybrid anion exchange membrane and preparation method thereof

An anion-exchange membrane, hybrid technology, applied in the field of imidazole-type hybrid anion-exchange membrane and its preparation

Inactive Publication Date: 2013-04-10
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the quaternary ammonium type, the alkali resistance of the imidazole-type anion-exchange membrane is improved to a certain extent, but because methylimidazole can only react with the polymer matrix to provide cationic functional groups, the membrane structure lacks a cross-linked structure. Dimensional stability of the membrane is not good

Method used

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  • Imidazole-type hybrid anion exchange membrane and preparation method thereof
  • Imidazole-type hybrid anion exchange membrane and preparation method thereof
  • Imidazole-type hybrid anion exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0021] Firstly, 10 parts by weight of brominated polyphenylene ether are dissolved in 37 parts by weight of N-methylpyrrolidone (NMP); The mass-to-volume ratio is 1:0.04~0.20; then add the ultraviolet light reaction catalyst benzoin methyl ether, the amount of benzoin methyl ether added is 1% of the mass of brominated polyphenylene ether, and stir evenly to obtain the casting liquid; the prepared casting After the membrane solution is allowed to stand for defoaming, it is cast into a membrane; 50 o Dry at C for 15 hours; place under a UV lamp with a wavelength of 365 nm to react for 15 hours to obtain an imidazole-type hybrid anion exchange membrane. Soak the anion-exchange membrane in NaCl (1 mol / L) solution for chlorine type conversion, then wash it with a large amount of deionized water and store it.

[0022] These several examples are to investigate the influence of different vinylimidazole contents on the prepared imidazole type hybrid anion exchange membrane.

[0023] ...

Embodiment 4-6

[0026] Firstly, 10 parts by weight of brominated polyphenylene ether are dissolved in 37 parts by weight of N-methylpyrrolidone (NMP); The mass-to-volume ratio of the product is 1:0.20; then add the ultraviolet light reaction catalyst benzoin methyl ether, the addition of benzoin methyl ether is 1% of the mass of brominated polyphenylene ether, and stir to obtain the casting solution; the prepared casting solution After static defoaming, cast into film; 50 o Dry at C for 15 hours; place under a UV lamp with a wavelength of 365 nm to react for 0 to 15 hours to obtain an imidazole-type hybrid anion exchange membrane. Soak the anion-exchange membrane in NaCl (1 mol / L) solution for chlorine type conversion, then wash it with a large amount of deionized water and store it.

[0027] These examples are to investigate the influence of different ultraviolet photocatalytic reaction times on the prepared imidazole type hybrid anion exchange membrane.

[0028]

[0029] It can be seen...

Embodiment 7-9

[0031] First, 0-0.08 parts by weight of hollow mesoporous silica spheres (hollow core size is about 200 nm, wall thickness is about 30 nm, and mesopore diameter is about 1.95 nm) are dispersed in 37 parts by weight of N-methylpyrrolidone (NMP); 10 parts by weight of brominated polyphenylene ether are dissolved in 37 parts by weight of N-methylpyrrolidone (NMP); then vinylimidazole is added to stir and react for 1h, the quality of brominated polyphenylene ether is the same as that added The mass-to-volume ratio of vinylimidazole is 1:0.20; then add the ultraviolet light reaction catalyst benzoin methyl ether, the addition of benzoin methyl ether is 1% of the mass of brominated polyphenylene ether, and stir to obtain the casting solution; the prepared After standing for defoaming, the casting solution was cast into a film; 50 o Dry at C for 15 hours; place under a UV lamp with a wavelength of 365 nm to react for 15 hours to obtain an imidazole-type hybrid anion exchange membrane...

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Abstract

The invention belongs to the technical field of membranes, and particularly relates to an imidazole-type hybrid anion exchange membrane and a preparation method thereof. The main body of the imidazole-type hybrid anion exchange membrane has a crosslinked structure and is dispersed with silicon spheres therein; and an ion exchange group is an imidazole-type positively-charged group. By the preparation method, a polymer can be loaded with a cationic functional group and the silicon oxide spheres can be loaded onto a hybrid membrane effectively, and the hybrid anion exchange membrane with good conductive performance and stable chemical properties can be obtained; polymer brominated polyphenyl ether is prefunctionalized by using vinyl imidazole to form relatively large ion clusters beneficial to conduction, and imidazole-type cations have relatively good chemical stability in an alkaline environment; double bonds of the vinyl imidazole can react under the catalytic action of ultraviolet light to form the crosslinked structure, thus benefiting the size stability and the chemical stability of the imidazole-type hybrid anion exchange membrane; and the used modified silicon spheres can be uniformly dispersed into the hybrid membrane, with good compatibility, thus benefiting the chemical stability of the hybrid membrane.

Description

technical field [0001] The invention belongs to the field of membrane technology, and in particular relates to an imidazole type hybrid anion exchange membrane and a preparation method thereof. Background technique [0002] Organic anion exchange membranes are generally composed of three parts: polymer matrix, positively charged active groups, and mobile anions on the active groups. Common organic anion exchange membranes generally use halomethylation followed by quaternization to bring functional groups to the polymer membrane. In addition to the use of highly toxic and non-environmentally friendly reagents in the halomethylation and quaternization processes, the preparation method also has an unsatisfactory chemical stability for long-term use in an alkaline environment, making it Applications, especially in alkaline fuel cells, have been greatly restricted. [0003] "Chemical Communication" (Chemical Communication, 2010, 46, 7495-7497) reported an anion exchange membran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22C08L51/08C08F283/08C08F2/48C08K9/04C08K3/36C08K7/26B01J41/12
Inventor 吴慧青汤蓓蓓武培怡
Owner FUDAN UNIV
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