Compound crosslinking alkaline polymer film for fuel cell, preparation method and application
A fuel cell and polymer membrane technology, which is applied in fuel cells, fuel cell parts, solid electrolyte fuel cells, etc., can solve the problems of complex preparation of alkaline membranes, poor membrane stability, high price, and achieve excellent chemical stability. , the preparation method is simple, the effect of high conductivity
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Embodiment 1
[0031] Weigh 50 g of 99% PVA (average molecular weight 86,000-89,000) into 500 mL of deionized water, heat while stirring, and continue heating and stirring for 2 hours until the temperature rises to 90 ° C to obtain a clear and transparent homogeneous solution. This PVA solution was used as the precursor fluid for film formation. Weigh PVP (average molecular weight = 40,000) in 10mL deionized water according to the film-making ratio, stir and dissolve to a transparent liquid, then mix the above two solutions, add 10mL deionized water and stir for 2 hours to obtain a uniform mixed solution. Afterwards, 10 mL of the solution was placed in a petri dish with a diameter of 10 mL, the solution was allowed to expand naturally, and dried at room temperature for 3 days in a ventilated state. Then the film was peeled off from the petri dish, cut into 3cm×3cm size and placed in acetone reagent containing 10% glutaraldehyde or hexanedione for cross-linking for 6 hours. The mass ratio of...
Embodiment 2
[0035] Weigh 50 g of 99% PVA (average molecular weight 86,000-89,000) into 500 mL of deionized water, heat while stirring, and continue heating and stirring for 2 hours until the temperature rises to 90 ° C to obtain a clear and transparent homogeneous solution. This PVA solution was used as the precursor fluid for film formation. Weigh PEGDCE in 10mL deionized water according to the film-making ratio, stir and dissolve to a transparent liquid, then mix the above two solutions according to a certain ratio, and add 10mL deionized water at the same time and stir for 2 hours to obtain a uniform mixed solution. Afterwards, put a certain volume of the solution on the casting film base material, let it unfold naturally, and dry it at room temperature under ventilated state, then peel off the film in a petri dish, cut it into 3×3cm size and place it in a container containing 10% glutaraldehyde or Cross-linking of hexanedione in acetone reactant for 4 hours. The mass ratio of PVA to ...
Embodiment 3
[0038] Weigh 50 g of 99% PVA (average molecular weight 86,000-89,000) into 500 mL of deionized water, heat while stirring, and continue heating and stirring for 2 hours until the temperature rises to 90 ° C to obtain a clear and transparent homogeneous solution. This PVA solution was used as the precursor fluid for film formation. Weigh PAADDAC and (or) PEG in 10mL deionized water, respectively, stir and dissolve to a transparent liquid, then mix the above three solutions according to a certain proportion, and add a certain proportion of deionized water at the same time and stir for 4 hours to obtain a uniform mixed solution. Afterwards, a certain volume of the solution was placed on the cast film substrate, allowed to unfold naturally, and dried for 3 days at room temperature under ventilated conditions. Then the film was peeled off from the petri dish, cut into 3cm×3cm size, and placed in an acetone reagent containing 10% glutaraldehyde for cross-linking for 7 hours. The ma...
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