Polymer anion exchange membrane and preparation method thereof

An exchange membrane and polymer technology, applied in electrical components, circuits, battery electrodes, etc., can solve the problems of poor thermal stability and chemical stability of anion exchange membranes, decreased performance of anion exchange membranes, and no disclosure of mechanical performance data. Good thermal and chemical stability, good mechanical properties, simple results

Inactive Publication Date: 2011-05-11
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional quaternary ammonium salt type polymer anion exchange membrane has poor thermal and chemical stability
Quaternary ammonium groups have poor stability in alkaline solutions

Method used

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  • Polymer anion exchange membrane and preparation method thereof
  • Polymer anion exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 0.20g (0.85mmol), 0.10g (0.96mmol) of styrene, 0.20g (3.73mmol) of acrylonitrile, 0.01g of benzoin ethyl ether, 0.02g of divinylbenzene, mix the solution evenly, apply it on the mold, and irradiate with ultraviolet light ( Wavelength 240nm-380nm) 30min, in-situ polymerization to form a film. The anion exchange membrane was then soaked in 1M KOH solution at 50°C for 24 hours to convert anions into OH - , the OH obtained in this example - The ion exchange capacity of the type anion exchange membrane is 1.47mmol / g, and the ion conductivity at room temperature is 3.13×10 -2 S cm -1 , the ionic conductivity at 90°C is 6.53×10 -2 S cm -1 . The tensile strength is 11.41Mpa, the Young's modulus is 439.9Mpa, and the elongation at break is 52.65%.

Embodiment 2

[0025] 0.20g (0.85mmol), 0.30g (5.60mmol) of acrylonitrile, 0.01g of benzoin ethyl ether, 0.02g of divinylbenzene, mix the solution evenly, apply it on the mold, irradiate with ultraviolet light (wavelength 240nm-380nm) for 30min, in situ Polymerize into film. Then soak the anion exchange membrane in 5M KOH solution at 60°C for 24 hours to convert anions into OH - , the OH obtained in this example - The ion exchange capacity of the type anion exchange membrane is 1.52mmol / g, and the ion conductivity at room temperature is 3.60×10 -2 S cm -1 , the ionic conductivity at 90°C is 7.53×10 -2 S cm -1 . The tensile strength is 10.23Mpa, the Young's modulus is 521.34Mpa, and the elongation at break is 55.34%.

Embodiment 3

[0027] 0.20g (0.87mmol), 0.30g (5.60mmol) of acrylonitrile, 0.01g of benzoin ethyl ether, 0.02g of azobisisobutyronitrile, mix the solution evenly, apply it on the mold, polymerize at 75°C for 6 hours, and in situ Polymerize into film. The anion exchange membrane was then soaked in 10M KOH solution at 60°C to convert anions into OH - , the OH obtained in this example - The ion exchange capacity of the type anion exchange membrane is 1.53mmol / g, and the ion conductivity at room temperature is 3.6×10 -2 S cm -1 , the ionic conductivity at 90°C is 6.26×10 -2 S cm -1 . The tensile strength is 10.23Mpa, the Young's modulus is 521.34Mpa, and the elongation at break is 55.34%.

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Abstract

The invention relates to a polymer anion exchange membrane and a preparation method thereof, in particular to an anion exchange membrane capable of being used for an alkaline fuel cell and a preparation method thereof. The preparation method comprises the following steps of: mixing a polymer monomer and polymeric ionic liquid in a mole ratio of 1:2-1:9; adding a cross-linking agent and an initiating agent; carrying out ultrasound on the mixed liquor to ensure that the mixed liquor is mixed uniformly; and carrying out in-situ polymerization to prepare the polymer anion exchange membrane, wherein the monomer is a mixture which is selected from one or more than two of acrylonitrile, styrene, alpha-methyl styrene, and alpha-methacrylonitrile. The preparation method is simple, more economic and more environment-friendly; compared with the anion exchange membrane reported in the prior art, the obtained anion exchange membrane can guarantee higher ionic conductivity, good alkali-resisting property, good heat stability and chemical stability, and can furthermore obtain good mechanical property.

Description

technical field [0001] The invention relates to a polymer anion exchange membrane and a preparation method thereof, in particular to an anion exchange membrane which can be used in an alkaline fuel cell and a preparation method thereof. Background technique [0002] Anion exchange membranes have been widely used in industrial fields such as water treatment, hydrometallurgy, chemical separation and alkaline fuel cells. The traditional preparation method of quaternary ammonium salt type polymer anion exchange membrane must go through the process of chloromethylation when introducing ion exchange groups, and the highly toxic carcinogen chloromethyl ether is used in the chloromethylation process, and in Organic solvents are used in the process of preparing anion exchange membranes, which have great harm to environmental protection and human health. [0003] The Chinese invention application publication with the application number of 201010185161.4 discloses a preparation method...

Claims

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Application Information

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IPC IPC(8): C08F220/48C08F226/06C08F212/08C08F220/50C08F216/14C08F212/14C08J7/12C08J5/22C08L33/20C08L33/22H01M4/94
CPCY02E60/50
Inventor 严锋林本才
Owner SUZHOU UNIV
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