Ultrathin perfluorocarboxylic acid ion exchange membrane with rough coating and preparation method of same
A technology of perfluorocarboxylic acid ions and rough coating, which is applied in the field of ion exchange membranes, can solve the problems of hindering ion transmission paths, increasing membrane resistance, and not conducting ions, etc., and achieves simple and reasonable process, low membrane resistance, and improved membrane surface The effect of roughness
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Embodiment 1
[0042] Ultrathin perfluorocarboxylic acid ion-exchange membranes with rough coatings were prepared as follows:
[0043] (1) Dissolve the perfluorocarboxylic acid resin of IEC=1.08mmol / g in a solvent made of ethanol and isopropanol in a weight ratio of 1:1 to form a perfluorocarboxylic acid resin solution, and then 8 μm thick poly The tetrafluoroethylene porous non-woven membrane was treated in the ultrasonically treated trifluorotrichloroethane solvent for 1.5h, and after it was taken out and dried, the perfluorocarboxylic acid resin solution was coated on the upper and lower surfaces of the polytetrafluoroethylene porous non-woven membrane. The total thickness of the cloth is 20 μm, and finally dried to form a perfluorocarboxylic acid ion exchange membrane precursor;
[0044](2) Under 180°C and 120t pressure, the perfluorocarboxylic acid ion exchange membrane precursor is subjected to overpressure treatment with an overpressure machine at a speed of 45m / min. After the overpre...
Embodiment 2
[0061] Ultrathin perfluorocarboxylic acid ion-exchange membranes with rough coatings were prepared as follows:
[0062] (1) Dissolve the perfluorocarboxylic acid resin of IEC=1.3mmol / g in a solvent made of ethanol and isopropanol in a weight ratio of 1:1 to form a perfluorocarboxylic acid resin solution, and then 40 μm thick poly The tetrafluoroethylene porous non-woven membrane was treated in the ultrasonically treated trifluorotrichloroethane solvent for 1.5h, and after it was taken out and dried, the perfluorocarboxylic acid resin solution was coated on the upper and lower surfaces of the polytetrafluoroethylene porous non-woven membrane. The total thickness of the cloth is 70 μm, and finally dried to form a perfluorocarboxylic acid ion exchange membrane precursor;
[0063] (2) Under 180°C and 120t pressure, the perfluorocarboxylic acid ion exchange membrane precursor is subjected to overpressure treatment with an overpressure machine at a speed of 45m / min. After the overpr...
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