Method for preparing perfluorocarboxylic acid ion membranes by liquid surface tape casting method
A technology of perfluorocarboxylic acid ion and perfluorocarboxylic acid, which is used in the manufacture of final products, collectors/separators, components of fuel cells, etc. problems, to ensure the uniformity and stability of heating, simplify the tedious operation process, and achieve the effect of good uniformity
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Embodiment 1
[0045] Put perfluorocarboxylic acid resin and ethanol in an autoclave at a mass ratio of 3:97, heat to 160°C at a rate of 10°C / min, keep the temperature for 20 hours, and cool down at a rate of 5°C / min to obtain the perfluorocarboxylic acid resin The acid resin solution is filtered and used for later use. Add lead-tin alloy with a melting point of 180°C into a heatable stainless steel tank, and heat to melt it. Preheat the perfluorocarboxylic acid resin solution obtained above to 120°C, and then add it to the surface of the molten alloy liquid. After the perfluorocarboxylic acid resin solution is cast and balanced on the molten alloy liquid surface, the alloy solution is heated. The heating rate is 10°C / min, stop heating when the temperature reaches 200°C, keep warm for 10 minutes, then cool down to 185°C. During this process, N 2 for protection. Remove the formed film from the alloy liquid surface to obtain the perfluorocarboxylic acid ion film.
[0046] The test data of ...
Embodiment 2
[0048] Put perfluorocarboxylic acid resin and dimethyl sulfoxide in an autoclave at a mass ratio of 35:65, heat to 170°C at a rate of 10°C / min, keep it warm for 18 hours, keep stirring during the heating and heat preservation process, stir Rate 60 rpm / min. The temperature was lowered at a rate of 5° C. / min, and the obtained solution was filtered for later use. Add a bismuth-based alloy with a melting point of 180°C into a heatable stainless steel tank, and heat to melt it. Preheat the perfluorocarboxylic acid resin solution obtained above to 120°C, and then add it to the surface of the molten alloy liquid. After the perfluorocarboxylic acid resin solution is cast and balanced on the molten alloy liquid surface, the alloy solution is heated. The heating rate is 10°C / min, stop heating when the temperature reaches 240°C, and keep warm for 10 minutes. Then cool down to 185°C. During this process, He has been fed in for protection. Remove the formed film from the alloy liquid s...
Embodiment 3
[0051] Put the perfluorocarboxylic acid resin and N,N-dimethylformamide in an autoclave at a mass ratio of 50:50, heat it to 220°C at a rate of 5°C / min, and keep it warm for 24 hours. During the heating and heat preservation process, Keep stirring at a stirring rate of 2000 rpm / min. The temperature was lowered at a rate of 2° C. / min, and the obtained solution was filtered for later use. Add an indium-based alloy with a melting point of 160°C into a heatable stainless steel tank, and heat to melt it. Preheat the perfluorocarboxylic acid resin solution obtained above to 110°C, and then add it to the surface of the molten alloy liquid. After the perfluorocarboxylic acid resin solution is cast and balanced on the molten alloy liquid surface, the alloy solution is heated. The heating rate is 10°C / min, stop heating when the temperature reaches 195°C, and keep warm for 10 minutes. Then cool down to 175°C. During this process, Ne is always connected for protection. Remove the form...
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