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Preparation method of blended cross-linked anion exchange membrane

An anion exchange membrane, toluene technology, used in electrical components, circuits, battery electrodes, etc., can solve the problems of poor chemical stability and affect the life of fuel cells, and achieve the effects of low swelling rate, excellent chemical stability, and mild reaction conditions.

Inactive Publication Date: 2016-05-11
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a method for preparing a blended cross-linked anion-exchange membrane, which solves the problem of fuel cells in the prior art. The chemical stability of the anion exchange membrane used is poor, which affects the technical problems of the life of the fuel cell

Method used

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  • Preparation method of blended cross-linked anion exchange membrane
  • Preparation method of blended cross-linked anion exchange membrane
  • Preparation method of blended cross-linked anion exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 0.2g of azobisisobutyronitrile initiator and 30ml of toluene into a dry and clean 100ml three-neck flask respectively, and stir magnetically. After the initiator is completely dissolved, add 20ml (20.78g) of vinylimidazole under the protection of nitrogen. The reaction system was heated up to 70°C, and reacted at this temperature for 20 hours. After cooling to room temperature, it was slowly poured into acetone, stirred, and filtered with suction. The filter cake was washed repeatedly with acetone, placed in a vacuum oven, and dried at 60°C. , to obtain 18.9 g of polyvinylimidazole product.

[0026] figure 2 is the proton nuclear magnetic resonance spectrum of the prepared polyvinylimidazole, the attribution of each peak has been marked in the figure, and the analysis result is consistent with the structure of polyvinylimidazole.

Embodiment 2

[0028] In a dry and clean 100ml three-necked flask, add 3.76g (40mmol) of the polyvinylimidazole prepared in Example 1, add 35ml of dimethyl sulfoxide under nitrogen protection, magnetically stir, and heat to completely dissolve the polyvinylimidazole After cooling to room temperature, 5.13 g (30 mmol) of benzyl bromide was added to the reaction flask, and the reaction was carried out at 80° C. for 10 hours. Cool to room temperature, slowly pour the resulting solution into acetone, filter with suction, wash the filter cake fully with acetone to remove unreacted benzyl bromide and dimethyl sulfoxide, put it in a vacuum oven, and dry it at 60°C Dry to obtain polyvinylimidazolium bromide.

[0029] image 3 It is the proton nuclear magnetic resonance spectrum of the brominated polyvinylimidazolium salt. The attribution of each peak has been marked in the figure. According to the area ratio of the two peaks of H4 and H1, the quaternization rate can be calculated as 68%. .

Embodiment 3

[0031] (1) Add 0.1g polybenzimidazole containing side amino groups respectively in a dry and clean Erlenmeyer flask (the chemical structure of polybenzimidazole containing side amino groups is as follows: figure 1 Shown) and 2ml dimethyl sulfoxide, heat and stir to make it fully dissolved, add 0.9g brominated polyvinylimidazolium salt and 18ml Dimethyl sulfoxide, heated and stirred to fully dissolve. After cooling to room temperature, mix the two solutions with each other, and add 0.1235g of 1,6-dibromohexane and 0.01g of bisphenol A epoxy resin to the mixture, stir for 30min with a magnet, filter, and then cast On a dry and clean glass plate, place it in a blast oven, dry it at 80°C for 10 hours, then transfer it to a vacuum oven, and dry it at 110°C for 3 hours to obtain polyvinyl benzyl imidazolium bromide / Blended cross-linked anion exchange membrane with polybenzimidazole mass ratio of 9:1.

[0032] (2) At room temperature, soak the blended cross-linked anion exchange m...

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Abstract

The invention discloses a preparation method of a blended cross-linked anion exchange membrane. The preparation method includes: using low-price vinyl imidazole monomer as a raw material, utilizing a radical polymerization method to prepare polyvinyl imidazole, using benzyl bromide as a quaternization reagent to be in reaction with polyvinyl imidazole to prepare a brominated polyvinyl benzyl imidazolium salt, subjecting the brominated polyvinyl benzyl imidazolium salt and pendant amino containing polybenzimidazole to solution blending, and using low-price epoxy resin as a cross-linking agent to obtain a brominated polyvinyl benzyl imidazolium salt / polybenzimidazole blended cross-linked anion exchange membrane; soaking the membrane in an alkali solution, taking the membrane out, and washing the same to be neutral to obtain a hydroxide polyvinyl benzyl imidazolium salt / polybenzimidazole blended cross-linked anion exchange membrane. The alkaline anion exchange membrane has high ion exchange capacity, high hydroxyl conductivity, good mechanical strength and low swelling rate.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to an anion exchange membrane, in particular to a preparation method of a blended cross-linked anion exchange membrane. Background technique [0002] In recent years, various energy issues and environmental issues have emerged, triggering deep reflections in various countries. At present, most of the energy used by human beings is non-renewable resources such as petroleum and coal, but these existing energy sources not only cannot meet the requirements of sustainable development of human society, but also bring a series of environmental problems, so it is urgent Need to develop clean energy technologies. [0003] Fuel cells are characterized by cleanliness, high efficiency, and quietness, and can truly achieve zero pollution. They have broad application prospects in the fields of electric vehicles, distributed power stations, and mobile power lights. In recent years, alkaline anion...

Claims

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Application Information

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IPC IPC(8): C08J5/22C08J3/24C08L79/04C08L39/04C08F126/06C08F8/20H01M4/94
CPCC08F8/20C08F126/06C08F2800/10C08F2800/20C08J3/246C08J5/2268C08J5/2287C08J2339/04C08J2379/04C08L39/04C08L79/04C08L2201/08C08L2203/16C08L2203/20H01M4/94Y02E60/50
Inventor 房建华金闪闪刘功益康诗钊
Owner SHANGHAI INST OF TECH
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