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Alkaline anion-exchange composite membrane with high mechanical properties, and preparation and application thereof

A technology of basic anion and mechanical properties, which is applied in the field of basic anion exchange composite membranes, can solve the problems of complex preparation process, decline, and decline of membrane performance, and achieve the effect of simple preparation method, good film-forming property and easy operation

Inactive Publication Date: 2015-02-25
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of these anion exchange membranes is complicated, and at the same time, they are unstable under high-concentration lye, especially at higher temperatures (greater than 60°C), resulting in a decline in membrane performance or even membrane degradation, and a sharp decline in the mechanical strength of the membrane. Therefore, It is of great significance to research and develop new basic anion exchange membranes with high performance, high stability, superior mechanical strength, easy preparation and low price.

Method used

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  • Alkaline anion-exchange composite membrane with high mechanical properties, and preparation and application thereof
  • Alkaline anion-exchange composite membrane with high mechanical properties, and preparation and application thereof
  • Alkaline anion-exchange composite membrane with high mechanical properties, and preparation and application thereof

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Embodiment 1

[0029] 30g of oxygen-containing water-soluble PVA powder (molecular weight: 89000-98000) was dissolved in 300ml of deionized water, heated and stirred at 90°C to a transparent and uniform solution to prepare a 10% PVA stock solution. Press PVA and FC370 mass ratio = 1:1, the above PVA aqueous solution and FC370 (molecular weight: about 400,000) solution is mixed, after stirring into a uniform transparent solution, the mixed solution is cast into a plastic disc, and naturally dried to form a film. The film was naturally peeled off and placed in an oven at 130°C for physical cross-linking for 1 hour, and then immersed in 15mL 10% glutaraldehyde (GA, 25wt%) acetone (≥99.5wt%) solution containing a small amount of HCl at room temperature After carrying out the chemical cross-linking reaction for 1 hour, the membrane was taken out and immersed in deionized water to wash thoroughly. The PVA prepared by the above method / The FC370 membrane was immersed in 2M KOH solution for ion ex...

Embodiment 2

[0032] 30 g of PVA powder (molecular weight: 89000-98000) was dissolved in 300 ml of deionized water, and heated and stirred at 90° C. to a transparent and uniform solution to prepare a 10% PVA stock solution. Press PVA and FC370 mass ratio = 1:1, the above PVA aqueous solution and FC370 (molecular weight: about 400,000) solution is mixed, after stirring into a uniform transparent solution, the mixed solution is cast into a plastic disc, and naturally dried to form a film. The membrane was naturally peeled off and placed in an oven at 150°C for physical cross-linking for 1 hour, and then immersed in 15mL 10% glutaraldehyde (GA, 25wt%) acetone (≥99.5wt%) solution containing a small amount of HCl at room temperature After carrying out the chemical cross-linking reaction for 1 hour, the membrane was taken out and immersed in deionized water to wash thoroughly. The PVA prepared by the above method / The FC370 membrane was immersed in 2M KOH solution for ion exchange for 24 hours ...

Embodiment 3

[0035] 30 g of PVA powder (molecular weight: 89000-98000) was dissolved in 300 ml of deionized water, and heated and stirred at 90° C. to a transparent and uniform solution to prepare a 10% PVA stock solution. Press PVA and FC370 mass ratio = 1:1, the above PVA aqueous solution and FC370 (molecular weight: about 400,000) solution is mixed, after stirring into a uniform transparent solution, the mixed solution is cast into a plastic disc, and naturally dried to form a film. The film was peeled off and placed in an oven at 170℃ for physical cross-linking for 1 hour, and then the film was immersed in 15mL 10% glutaraldehyde (GA, 25wt%) acetone (≥99.5wt%) solution containing a small amount of HCl at room temperature After the chemical cross-linking reaction was carried out for 1 hour, the membrane was taken out and immersed in deionized water for full washing. The PVA prepared by the above method / The FC370 membrane was immersed in 2M KOH solution for ion exchange for 24 hours a...

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Abstract

The invention relates to preparation and application of an alkaline anion-exchange composite membrane with high mechanical properties. The alkaline anion-exchange composite membrane with high mechanical properties comprises low-molecular-weight oxy water-soluble polyvinyl alcohol (PVA) and a polymer of quaternary-ammonium-group-containing water-soluble chlorinated-1-vinyl-3-methyl-1H-iminazole and 1-vinyl-2-pyrrolidone. The preparation method comprises the following steps: respectively dissolving oxy water-soluble PVA and quaternary-ammonium-group-containing Luviquat in deionized water to obtain a uniform mixed solution; carrying out vacuum filtration, pouring the filtrate into a plastic culture dish, and naturally drying to obtain a composite membrane; and carrying out thermophysical crosslinking on the composite membrane, carrying out chemical crosslinking, and finally, immersing in a KOH solution to carry out ion exchange. The preparation method has the advantages of accessible raw materials, low cost, no pollution, mild reaction conditions, short reaction time, simple and practical technique, high controllability and the like, and can easily implement large-scale production.

Description

Technical field [0001] The invention belongs to the field of alkaline membranes and their preparation and application, and in particular relates to an alkaline anion exchange composite membrane with high-strength mechanical properties and its preparation and application. Background technique [0002] Polymer membrane fuel cells (PEMFC) can be divided into proton exchange membrane (PEM) fuel cells and alkaline anion exchange membrane (AEM) fuel cells according to different conductive ions. PEM fuel cell has the advantages of low pollution emission, low operating temperature, short activation time, long life, stable operation, easy mass production, high energy conversion efficiency, etc., and has become one of the most efficient and environmentally friendly energy technologies in the 21st century [MAJ Cropper, S. Geiger, DM Jollie, J. Power Sources 131 (2004) 57-61; JRVarcoe, RCTSlade, E. Lam How Yee, SD Poynton, DJ Driscoll, DC Apperley, Chem. Mater. 19 (2007) 2686-2693.]. For e...

Claims

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Application Information

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IPC IPC(8): C08J5/22H01M8/02H01M8/10H01M4/88H01M4/94
CPCY02E60/50Y02P70/50
Inventor 乔锦丽高莹宋菲菲赵晓祥王强
Owner DONGHUA UNIV
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