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Preparation method of polymer alkaline anion-exchange membrane

A basic anion and exchange membrane technology, which is applied to fuel cell components, fuel cells, electrical components, etc., can solve the problems of difficult longitudinal and uniform distribution of functional groups, damage to polymer matrix structure, and weakened radiation energy, etc., to achieve The effect of large surface area, good thermal stability, and large ionic conductivity

Inactive Publication Date: 2011-07-13
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, high radiation energy can easily cause damage to the polymer matrix structure, so the radiation grafting method is only suitable for perfluoropolymer matrix [T.N.Danks, et al., J.Mater.Chem.13(2003)712]
At the same time, since the radiation energy decreases with the increase of the penetration depth, it is difficult for the functional groups to form a uniform longitudinal distribution, which affects the OH - ion transport

Method used

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  • Preparation method of polymer alkaline anion-exchange membrane
  • Preparation method of polymer alkaline anion-exchange membrane
  • Preparation method of polymer alkaline anion-exchange membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0025] First weigh 10g of polyvinyl chloride powder and place it in a plasma reactor, vacuumize to the background, pass in argon gas to 30Pa, and discharge at 100W for 30min; then add 20ml of chloromethylbenzene to the powder activated by plasma In ethylene, stir at 60°C for 24 hours, centrifuge, filter, wash and soak repeatedly with deionized water to remove residual monomers on the surface of the polymer, and dry; dissolve the dried powder in tetrahydrofuran to make a mass percentage solution with a concentration of 10%, then salivate into a film, and dry the film; then soak the film in 33% trimethylamine aqueous solution for 48 hours, take it out, and wash it repeatedly with deionized water; finally, immerse the film in 1mol / L NaOH aqueous solution for 48 hours , after taking it out, wash it repeatedly with deionized water and soak it to get the alkaline anion exchange membrane. figure 1 Infrared spectrum data map for plasma grafted basic anion exchange membrane, through f...

Embodiment 2

[0029]First weigh 10g of polyethersulfone powder and place it in the plasma reactor, vacuumize to the background, pass nitrogen gas to 10Pa, and discharge at 140W for 30min; then add the plasma-activated powder into 20ml of chloromethyl styrene , stirred at 60°C for 24 hours, centrifuged, filtered, repeatedly washed and soaked with deionized water to remove residual monomers on the surface of the polymer, and dried; the dried powder was dissolved in N,N-dimethyl formaldehyde Prepare a solution with a mass percentage concentration of 10% in the amide, then salivate to form a film, and dry the film; then soak the film in 33% trimethylamine aqueous solution for 48 hours, take it out, and wash it repeatedly with deionized water; finally immerse the film in 1mol / L NaOH aqueous solution for 48 hours, after taking it out, wash it repeatedly with deionized water and soak it to obtain the alkaline anion exchange membrane.

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Abstract

The invention relates to a preparation method of an anion-exchange membrane, which comprises the following steps: generating free radicals on the surface of polymer powder by plasma bombardment, carrying out graft copolymerization on the free radicals and chloromethyl styrene monomer, introducing functional radicals onto the polymeric matrix, and quaternizing and alkalifying the functional radicals to form ion-exchange radicals, thereby obtaining the anion-exchange membrane of which the functional radicals are uniformly distributed in the longitudinal direction. The method provided by the invention has the advantages of no toxicity and no environment pollution, and does not damage the polymer frame. The prepared anion-exchange membrane has the advantages of favorable thermal stability, chemical stability, electron exchange capacity and ionic conductivity, and low methanol transmittance, is suitable for polymer dielectric fuel batteries, and is especially suitable for alkaline direct alcohol fuel batteries.

Description

technical field [0001] The invention relates to a preparation method of an anion exchange membrane, in particular to a preparation method of a polymer basic anion exchange membrane. Background technique [0002] Direct Alcohol Fuel Cell (DAFC) has the characteristics of high efficiency, low pollution, and wide source of fuel. It is a fuel cell with great development potential and application value [Y.Wang, et al., Electrochem.Commun.5 (2003 ) 662; M. Sevilla, et al., Electrochim. Acta 54 (2009) 2234; E. Antolini, et al., J. Power Sources 170 (2007) 1]. Among them, the alkaline direct alcohol fuel cell (ADAFC) uses the alkaline anion exchange membrane (AAEM) as the electrolyte to conduct hydroxide ions (OH - ), the working environment is alkaline, and compared with proton exchange membrane direct alcohol fuel cells, it has the following advantages: (1) Compared with acidic conditions, metal catalysts have higher catalytic performance under alkaline conditions, and both catho...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J5/22C08F259/04C08F283/00C08F255/02H01M8/02H01M2/16H01M8/1016H01M8/1069
CPCY02E60/12Y02E60/50
Inventor 胡觉张呈旭孟月东
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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