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Preparation method of hybrid anion exchange membrane based on brominated polyphenylene ether blend

A technology of anion exchange membrane and brominated polyphenylene ether, which is applied in the field of hybrid anion exchange membrane preparation, can solve problems that have not been seen yet, achieve good thermal stability and chemical stability, high ion exchange capacity, and superior conductivity Effect

Inactive Publication Date: 2011-12-14
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the preparation of hybrid negative membranes by blending the above polymer precursors with polymer brominated polyphenylene ethers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Film formation by blending brominated polyphenylene ether and polymer precursor

[0017] Preparation of polymer precursors containing alkoxysilane and benzyl bromide: 6.9ml p-chloromethylstyrene and 11.8ml trimethoxysilylpropyl methacrylate (molar ratio 1:1) were dissolved in 69.2ml In the dehydrated toluene, heat up to 60°C under the protection of nitrogen, add 0.066g of azobisisobutyronitrile, and react under magnetic stirring for 24 hours. The obtained solution is repeatedly purified by the method of n-hexane precipitation-toluene dissolution. Twice, the purified polymer precursor was dissolved in dewatered toluene to obtain a 0.21 g / m1 solution, which was the polymer precursor solution.

[0018] Preparation of organic-inorganic hybrid membrane: add 15.0ml brominated polyphenylene ether toluene solution (concentration: 0.23g / ml, benzyl bromination degree: 73%) and 9.6ml polymer prepared above in a round bottom flask Precursor solution, then add 49.2ml N,N...

Embodiment 2

[0027] Example 2: Preparation of hybrid negative membrane by blending brominated polyphenylene ether with higher content of polymer precursor

[0028] Using the same raw materials and preparation method as in Example 1, 15ml of brominated polyphenylene ether solution and 1.6ml of polymer precursor solution were dissolved in 16.6ml of toluene, and after magnetic stirring was uniform, 3.9ml of triethylamine liquid (with a density of 0.7g / ml), after reacting for 2 hours, add 0.83ml of water to carry out sol-gel reaction, react for 24 hours to get the coating liquid, coat the film on the polytetrafluoroethylene board, after natural drying, start from 30 ℃ with 20 The speed of ℃ / hour is heated up to 150 ℃, obtains the organic-inorganic hybrid anion exchange membrane, and adopts the method identical with embodiment 1 to test;

[0029] In this example, mass of brominated polyphenylene ether: mass of polymer precursor = 1: 0.1, total volume of brominated polyphenylene ether solution a...

Embodiment 3

[0036] Example 3: Preparation of hybrid negative membrane by blending lower content of brominated polyphenylene ether and polymer precursor

[0037] Using the same raw materials and preparation method as in Example 1, but the benzyl bromination degree of the brominated polyphenylene ether solution is 0.43, the concentration is 0.23g / ml, and 15ml of the brominated polyphenylene ether solution is mixed with 24.6ml of the polymer The solid solution was dissolved in 79.2ml of chlorobenzene, and after being stirred evenly by magnetic force, 21.6ml of trimethylamine N-N dimethylformamide solution (concentration: 3.99mmol / ml) was added, and 5.0ml of water was added after 2 hours of reaction for sol-gel Reaction, reaction for 24 hours to obtain a smear solution, coating the membrane on a polytetrafluoroethylene plate, after natural drying, heating from 30°C at 20°C / hour to 150°C to obtain an organic-inorganic hybrid anion exchange membrane, And adopt the method identical with embodime...

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Abstract

The invention discloses a preparation method of an organic-inorganic hybrid anion exchange membrane based on the blending of brominated polyphenylene ether. ether is blended, then quaternized with a tertiary amine, and then water and a catalyst are added to carry out a sol-gel reaction, and the obtained coating liquid is dried and cured to obtain an organic-inorganic hybrid film. The present invention adopts the blending method to effectively fuse the respective advantages of the polymer precursor and the brominated polyphenylene ether, and overcome their respective disadvantages to a certain extent. The prepared membrane has appropriate water content, higher ion exchange capacity, better thermal and chemical stability, and better mechanical properties, and in addition, the membrane also has very superior electrical conductivity. By adopting the method of the invention, the raw material components can be easily adjusted, and a series of organic-inorganic hybrid ion exchange membranes with excellent properties can be obtained by controlling the content and composition of the components.

Description

technical field [0001] The invention belongs to the technical field of hybrid anion exchange membrane preparation, in particular to a method for preparing an organic-inorganic hybrid anion exchange membrane by polymer blending and sol-gel reaction. Background technique [0002] Chinese patent ZL03132271.9 discloses a method for preparing positively charged organic-inorganic hybrid membranes, which involves aminolysis of polyfunctional alkoxysilanes and polymer compounds containing ester groups or epoxy side groups or end groups. Alcoholysis or ring-opening reaction, and then quaternization reaction on the product to obtain a positively charged sol-gel reaction precursor; then the precursor is subjected to a sol-gel reaction to obtain a positively charged organic-inorganic hybrid membrane. The positively charged hybrid membrane prepared by this method overcomes the defects of poor compatibility between the organic phase and the inorganic phase and the low flexibility of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L71/12C08L43/04C08L25/18C08J5/22C08F230/08C08F212/14C08F8/32B01D71/82B01D71/52
Inventor 徐铜文林小城吴永会
Owner UNIV OF SCI & TECH OF CHINA
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