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Preparation method of perfluorosulfonic acid composite ion conduction membrane

A technology of compound ion and perfluorosulfonic acid, applied in the field of ion exchange membrane, can solve the problems of complex membrane structure, and achieve the effect of improving ion selectivity, wide applicability and comprehensive performance.

Active Publication Date: 2020-08-11
辽宁科京新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the influence of membrane structure on performance is very complicated. At present, the literature published on perfluorosulfonic acid ion exchange membrane mainly discusses the performance of membrane, and the research on the influence of membrane structure on performance needs to be further studied.

Method used

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  • Preparation method of perfluorosulfonic acid composite ion conduction membrane
  • Preparation method of perfluorosulfonic acid composite ion conduction membrane

Examples

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Embodiment 1

[0032] In this embodiment, the preparation method of perfluorosulfonic acid composite ion-conducting membrane, the specific steps are as follows:

[0033] (1) Dissolve 6g of perfluorosulfonic acid resin (exchange capacity is 0.95mmol / g) in 100ml of dimethylacetamide solvent, heat and dissolve in a reaction kettle to form a perfluorosulfonic acid resin solution, and heat and dissolve under the temperature conditions 200°C;

[0034] (2) Dissolve 0.3g of perfluorocarboxylic acid resin (exchange capacity of 0.9mmol / g) in 30ml of dimethylacetamide solvent, heat and dissolve in a reaction kettle to form an additive solution, and heat and dissolve at a temperature of 200°C ;

[0035] (3) Add the solution prepared in step (2) to the resin solution prepared in step (1) for mixing, and stir for 24 hours to obtain a mixed solution.

[0036] (4) Pour the film-making solution prepared in step (3) onto a clean glass plate, and dry it to form a film under the conditions of a film-forming t...

Embodiment 2

[0039] In this embodiment, the preparation method of perfluorosulfonic acid composite ion-conducting membrane, the specific steps are as follows:

[0040] (1) Dissolve 6g of perfluorosulfonic acid resin (exchange capacity is 0.95mmol / g) in 100ml of dimethylacetamide solvent, heat and dissolve in a reaction kettle to form a perfluorosulfonic acid resin solution, and heat and dissolve under the temperature conditions 200°C;

[0041] (2) Dissolve 0.3g of perfluorosulfonic acid resin (exchange capacity is 0.83mmol / g) in 30ml of dimethylacetamide solvent, heat and dissolve in a reaction kettle to form an additive solution, and the temperature for heating and dissolving is 200°C ;

[0042] (3) Add the solution prepared in step (2) to the resin solution prepared in step (1) for mixing, and stir for 24 hours to obtain a mixed solution.

[0043] (4) Pour the film-making solution prepared in step (3) onto a clean glass plate, and dry it to form a film under the conditions of a film-fo...

Embodiment 3

[0046] In this embodiment, the preparation method of perfluorosulfonic acid composite ion-conducting membrane, the specific steps are as follows:

[0047] (1) Dissolve 6g of perfluorosulfonic acid resin (exchange capacity is 0.95mmol / g) in 100ml of dimethylacetamide solvent, heat and dissolve in a reaction kettle to form a perfluorosulfonic acid resin solution, and heat and dissolve under the temperature conditions 200°C;

[0048] (2) Dissolve 0.3g of perfluorosulfonic acid resin (exchange capacity is 0.83mmol / g) in 30ml of dimethylacetamide solvent, heat and dissolve in a reaction kettle to form an additive solution, and the temperature for heating and dissolving is 200°C ;

[0049] (3) Add the solution prepared in step (2) to the resin solution prepared in step (1) for mixing, and stir for 24 hours to obtain a mixed solution.

[0050] (4) Weighing 0.5 g of amino acid and adding it to the mixed solution prepared in step (3) for stirring, and stirring for 24 hours to obtain ...

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Abstract

The invention relates to the field of ion exchange membranes, in particular to a preparation method of a perfluorosulfonic acid composite ion conduction membrane. Perfluorosulfonic acid resin is usedas main film-forming resin; a high-compatibility additive (such as one or more than two of perfluorinated polymer materials, organic macromolecules or organic micromolecular substances with differentmolecular compositions and different molecular structures) is introduced into the perfluorinated sulfonic acid ion exchange membrane, and the microstructure in the membrane is regulated and controlledby changing the components and concentration of the membrane preparation liquid. Due to the regulation and control of the internal microstructure of the membrane, the conductivity, linear swelling rate after water absorption and other properties of the membrane are improved compared with those of the traditional membrane. The composite ion conduction membrane prepared by adopting the method has excellent comprehensive performance, and has important significance for wide applicability of a perfluorosulfonic acid ion exchange membrane.

Description

technical field [0001] The invention relates to the field of ion exchange membranes, in particular to a preparation method of a perfluorosulfonic acid composite ion conduction membrane. Background technique [0002] In the 1960s, the American DuPont Company (Du Pont) first developed a commercial product called Perfluorosulfonic Ionomer (Perfluorosulfonic Ionomer, also known as perfluorosulfonic ion exchange resin). As a polymer solid electrolyte with high chemical stability, it is used in the fuel cell developed by aerospace, which pioneered the application of perfluorinated ion polymers. The largest use of perfluorinated ion polymers today is to process them into ion exchange membranes for chlor-alkali applications. tanks and fuel cells. [0003] Perfluorinated proton exchange membranes are the first to realize industrialized production and application of proton exchange membranes. The market mainly includes: Nafion series membranes of DuPont Company of the United States...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1069H01M8/1032H01M8/1039
CPCH01M8/1032H01M8/1039H01M8/1069Y02E60/50
Inventor 赵丽娜张建国肖伟彭海泉
Owner 辽宁科京新材料有限公司
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