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High-alkali-stability anion exchange membrane and preparation method thereof

A carbon number and polymer technology, applied in the field of anion exchange membrane and its preparation, can solve the problems of severe hydrolysis, complex synthesis method, poor mechanical properties, etc., achieve uniform and dense membrane material, simple synthesis process, and improve alkali stability Effect

Inactive Publication Date: 2021-03-19
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many studies on the preparation of AEM with aromatics as the main chain of the polymer, such as polyphenylene ether, polyether ketone, polyether sulfone, etc. However, it is severely hydrolyzed under alkaline, especially high temperature conditions.
While full aliphatic or semi-aliphatic main chains, such as polystyrene, polyethylene, etc., have good alkali stability, but poor mechanical properties and relatively complicated synthesis methods (organometallic catalysis, radiation, etc.) and other problems still needs to be resolved

Method used

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  • High-alkali-stability anion exchange membrane and preparation method thereof
  • High-alkali-stability anion exchange membrane and preparation method thereof
  • High-alkali-stability anion exchange membrane and preparation method thereof

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Effect test

Embodiment 1

[0034] The preparation of embodiment 1 polymerization monomer (VTK):

[0035] Aluminum chloride (9.130 g, 68.47 mmol), dichloromethane (70.0 mL) and toluene (5.096 g, 55.307 mmol) were added to a 250 mL three-necked flask equipped with a magnetic stirrer. Acryloyl chloride (4.767 g, 52.668 mmol) diluted with 10.0 mL of dichloromethane was added from a constant pressure dropping funnel. Ice bath, react for 2 hours, and then transfer to 10% hydrochloric acid solution. The organic phase was repeatedly extracted with dichloromethane, washed with deionized water until neutral, and washed with anhydrous MgSO 4 dry.

Embodiment 2

[0036] Embodiment 2 polyvinyl ketone polymer (PVTK 100 ) preparation:

[0037]

[0038] Dissolve the dry and pure polymerization monomer in toluene, add the initiator azobisisobutyronitrile (AIBN), react at 60-70°C for 2 hours, pour the product into the methanol solution, and wash it with methanol to obtain the target polymerization thing.

Embodiment 3

[0039] Embodiment 3 polyvinyl ketone polymer (PVTK 200 ) preparation:

[0040]

[0041] Dissolve the dry and pure polymerized monomer in toluene, add the initiator azobisisobutyronitrile (AIBN), react at 60-70°C for 4 hours, pour the product into the methanol solution, and wash it with methanol to obtain the target polymer thing.

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Abstract

The invention relates to a high-alkali-stability anion exchange membrane and a preparation method thereof, wherein a polymerizable monomer with an active group is synthesized through a Friedel-Craftsreaction, and then a polyvinyl ketone polymer is synthesized through a free radical polymerization reaction; then, through bromination reaction, a polyvinyl ketone polymer with quaternization reactionactive sites is synthesized; finally, polyvinyl polymers with different side chains are synthesized through a Menshutkin reaction and a reduction reaction respectively and are converted into a membrane through a solvent pouring method under a semi-closed condition, and ion exchange is carried out to obtain the side chain type polyethylene anion exchange membrane. By changing a side chain structure, removing an electron withdrawing group and introducing long branched chains with different lengths, the ionic conductivity and the alkali-resistant stability of the anion exchange membrane are improved.

Description

technical field [0001] The invention belongs to the technical field of anion exchange membranes, and relates to an anion exchange membrane and a preparation method thereof. Background technique [0002] In recent decades, the problems of environmental pollution and energy shortage have become increasingly serious. my country, as a large energy-consuming country, faces this severe environmental and energy crisis, and it is imminent to develop new clean and alternative energy sources. Unlike conventional batteries, the fuel cell (Fuel Cell) is not limited by the Carnot cycle, and can directly convert the chemical energy stored in the fuel and oxidant into electrical energy, and its only by-product is water, which is an efficient and clean Green energy, which makes fuel cells stand out among many ways to solve environmental and energy problems. Fuel cell is an electrochemical power generation device, which directly converts chemical energy into electrical energy in an isotherm...

Claims

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Application Information

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IPC IPC(8): C08F8/44C08F8/00C08F8/24C08F116/36C08L29/12C08J5/22B01J41/14
CPCC08F8/44C08J5/2243B01J41/14C08J2329/12C08F8/00C08F8/24C08F116/36
Inventor 张轩桂广辉
Owner NANJING UNIV OF SCI & TECH
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