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Polycation side chain type anion exchange membrane prepared based on soft template method and preparation method of polycation side chain type anion exchange membrane

An anion exchange membrane and polycation technology, applied in the field of polycation side chain type anion exchange membrane and its preparation, can solve the problems of poor selectivity, low ion flux, etc., to promote formation, increase ion flux, and improve selectivity Effect

Active Publication Date: 2021-05-28
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low ion flux and poor selectivity mentioned above, the present invention proposes an anion exchange membrane induced by a soft template method to be applied in electrodialysis. Polyphenylene ether with excellent chemical stability and thermal stability as the main chain, the membrane has high ion flux and good selectivity

Method used

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  • Polycation side chain type anion exchange membrane prepared based on soft template method and preparation method of polycation side chain type anion exchange membrane
  • Polycation side chain type anion exchange membrane prepared based on soft template method and preparation method of polycation side chain type anion exchange membrane
  • Polycation side chain type anion exchange membrane prepared based on soft template method and preparation method of polycation side chain type anion exchange membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0041] (1) Preparation of brominated polyphenylene ether

[0042] Dissolve 12g of polyphenylene ether in 100mL of chlorinated benzene, and add a mixed reagent of N-bromosuccinimide and azobisisobutyronitrile at a molar ratio of 10:1, wherein N-bromosuccinimide 5.34g. The reaction was carried out at 120° C. for 4 hours. The reactant was poured into 1000 mL of absolute ethanol for precipitation, washed with absolute ethanol until the supernatant was colorless, and then vacuum-dried at 40° C. for 48 hours to obtain a polymer: brominated polyphenylene ether. The degree of bromination of the brominated polyphenylene ether is 10%.

[0043] figure 1 H for the brominated polyphenylene ether prepared in Example 1 1 NMR spectrum, wherein the peak generated at 4.3ppm is the peak of bromomethyl group, which proves the successful preparation of brominated polyphenylene ether.

[0044] (2) Preparation of ionizing reagents

[0045] First, 37.9 mL of 1,6-dibromohexane was dissolved in ...

Embodiment 2

[0055] (1) Preparation of brominated polyphenylene ether

[0056] Dissolve 12g of polyphenylene ether in 100mL of chlorinated benzene, and add a mixed reagent of N-bromosuccinimide and azobisisobutyronitrile at a molar ratio of 12:1, wherein N-bromosuccinimide 6.23 g. The reaction was carried out at 125°C for 3.5 hours. The reactant was poured into 1000 mL of methanol for precipitation, washed with methanol until the supernatant was colorless, and then vacuum-dried at 40° C. for 48 hours to obtain a polymer: brominated polyphenylene ether. The degree of bromination of the brominated polyphenylene ether is 10%.

[0057] (2) Preparation of ionizing reagents

[0058] First, dissolve 37.9mL of 1,6-dibromohexane in 90mL of tetrahydrofuran to form a co-solution, pass 59.1mL of trimethylamine solution into the co-melt solution 1 at 80°C, react at 30°C for 18 hours and then vacuum After filtration, it was washed with tetrahydrofuran, and vacuum-dried at 40°C for 48 hours to obtain...

Embodiment 3

[0066] (1) Preparation of brominated polyphenylene ether

[0067] Dissolve 12g of polyphenylene ether in 100mL of chlorinated benzene, and add a mixed reagent of N-bromosuccinimide and azobisisobutyronitrile at a molar ratio of 15:1, wherein N-bromosuccinimide 7.12 g. The reaction was carried out at 130° C. for 3 hours. The reactant was poured into 1000 mL of absolute ethanol for precipitation, washed with absolute ethanol until the supernatant was colorless, and then vacuum-dried at 40° C. for 48 hours to obtain a polymer: brominated polyphenylene ether. The degree of bromination of the brominated polyphenylene ether is 10%.

[0068] (2) Preparation of ionizing reagents

[0069] First, dissolve 37.9mL of 1,6-dibromohexane in 90mL of tetrahydrofuran to form a co-solution, pass 52.6mL of trimethylamine solution into the co-melt 1 at 80°C, react at 35°C for 14 hours, and then vacuum After filtration, it was washed with tetrahydrofuran, and vacuum-dried at 40°C for 48 hours t...

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Abstract

The invention discloses a polycation side chain type anion exchange membrane prepared based on a soft template method and a preparation method thereof, and belongs to the field of electrodialysis anion exchange membrane materials. The preparation method comprises the following steps: firstly, brominating polyphenyl ether to prepare brominated polyphenyl ether, then preparing a polycation side chain formed by connecting three quaternary ammonium salts in series through two-step synthesis, and finally preparing the anion exchange membrane from the polycation side chain and the brominated polyphenyl ether through a Michaku reaction, wherein small molecules containing two sulfonic acid groups are introduced and induction is performed through electrostatic acting force to finally prepare the anion exchange membrane through a solution casting method. The polycation side chain type anion exchange membrane can be applied to the field of electrodialysis. The preparation method is simple, the prepared anion exchange membrane has high ion exchange capacity, the membrane can ensure high fixed ion group concentration under low water absorption and high ion exchange capacity, and the selectivity of the anion exchange membrane is improved; besides, the continuous and wide ion channel improves the ion flux of the anion exchange membrane.

Description

technical field [0001] The invention belongs to the field of electrodialysis anion exchange membrane materials, and relates to a polycation side chain type anion exchange membrane prepared based on a soft template method and a preparation method thereof. Background technique [0002] With the rapid development of society and rapid population growth, the problems of resource scarcity and environmental pollution are becoming more and more serious. These problems force people to devote themselves to the research and development of efficient technologies for resource recovery and pollutant treatment. Compared with physical separation (distillation, rectification, etc.) and chemical precipitation separation technology, electrodialysis technology occupies a place in the separation industry with its inherent advantages of low energy consumption, low cost, high-efficiency separation, environmental friendliness and convenient operation. Electrodialysis desalination technology has bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/48B01D61/48
CPCC08G65/485B01D61/485
Inventor 张凤祥张安然李旅马玲玲白雷
Owner DALIAN UNIV OF TECH
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