Proton exchange film, proton exchange film fuel battery and method for making same
A technology of proton exchange membrane and cross-linking agent, which is applied in the direction of solid electrolyte fuel cells, fuel cells, fuel cell parts, etc., can solve the problems of low cost and no ability to significantly improve alcohol resistance, and achieve low production cost, The effect of cheap raw materials and simple preparation method
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[0022] One of its preparation method, it comprises the steps:
[0023] A. Weigh the components according to the weight ratio: 1 part of polyvinyl alcohol, 2-8 parts of acrylonitrile, 0.05-3 parts of acrylic acid derivative monomer, and 0.006-0.2 parts of initiator;
[0024] B, polyvinyl alcohol is heated and dissolved in water, and a homogeneous solution is obtained after fully stirring, with a concentration of 4 to 15 wt%.
[0025] C, adding acrylic acid derivative monomers and initiators to the polyvinyl alcohol solution prepared in step B to prepare an aqueous polymer colloidal emulsion;
[0026] D. Cast the water-based polymer colloid emulsion prepared in step C onto a horizontal plate to scrape off the film, dry and peel off to obtain the product; wherein, the drying temperature is 40-140°C.
[0027] If the raw material uses a cross-linking agent, then in step D, after adding 0.001 to 1 part of cross-linking agent to the aqueous polymer colloidal emulsion prepared in ste...
Embodiment 1
[0044] Preparation method: first fully dissolve 6.0g polyvinyl alcohol in 115.0ml water, pass N 2 After deoxygenation, slowly add a mixed solution of 38.0ml acrylonitrile (AN) and 10.0ml acrylic acid (AA) dropwise, and dissolve 0.3g benzoyl peroxide (BPO) in 45.0ml triethyl phosphate (TEP) during the reaction Join multiple times. Reaction at 70°C, copolymerization to obtain a milky white suspension colloidal emulsion, cast the emulsion on a horizontal glass plate to scrape the film, then put it in a vacuum oven, and heat it at 120°C for 8 hours to obtain a slightly yellowish tough proton exchange membrane.
[0045] The thickness of the obtained film is 100 μm, and the two-electrode method is used to measure the film at 1mol / L H 2 SO 4 The conductivity in solution is 1.69×10 -3 S / cm, the conductivity of Nafion117 film under the same test conditions is 2.32×10 -3 S / cm, indicating that the conductivity of the proton exchange membrane of the present invention meets the commerc...
Embodiment 2
[0047] The raw materials and preparation method are the same as in Example 1, the difference is that 2.0ml of 50% glutaraldehyde solution and a small amount of concentrated sulfuric acid are added under stirring conditions before the emulsion is cast into a film, and then cast into a film, the heat treatment temperature is 50°C, and the crosslinking After 4 hours of reaction, a proton exchange membrane with a thickness of about 100 μm was obtained.
[0048] The methanol permeability coefficient of the membrane was measured to be 1.5×10 -8 cm 2 / s.
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