High-strength binary cross-linked alkaline anion exchange composite film, preparation method and application
A basic anion and composite membrane technology, which is applied in the fields of electrical components, climate sustainability, and final product manufacturing, can solve the problems of complex anion exchange membrane preparation process, decreased mechanical strength, and decreased membrane performance, so as to improve CO2 electricity. Chemical reduction performance, easy operation, low cost effect
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[0026] Example 1
[0027] A method for preparing high-strength binary cross-linked basic anion exchange composite membrane:
[0028] 1) Dissolve 2g of PVA powder in 100mL of deionized water, heat and stir at 90°C to a transparent and homogeneous solution to prepare a 2% PVA stock solution;
[0029] 2) Configure GG solution according to the mass ratio of PVA to GG=1:0.5;
[0030] 3) Mix the above-mentioned PVA aqueous solution and GG solution, and after stirring into a uniform transparent solution, cast the mixed solution into a plastic disc, and dry it naturally to form a film;
[0031] 4) Peel off the film and place it in an oven at 150°C for physical cross-linking for 1 hour, and then immerse the film in 20mL 10% glutaraldehyde (GA, 50wt%) acetone (>99.5wt%) solution containing a small amount of hydrochloric acid at room temperature After the chemical cross-linking reaction is carried out for 4 hours, the membrane is taken out and immersed in deionized water to wash thoroughly
[0032...
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[0033] Example 2
[0034] A method for preparing high-strength binary cross-linked basic anion exchange composite membrane:
[0035] 1) Dissolve 2g of PVA powder in 100mL of deionized water, heat and stir at 90°C to a transparent and homogeneous solution to prepare a 2% PVA stock solution;
[0036] 2) Configure GG solution according to the mass ratio of PVA to GG=1:0.5;
[0037] 3) Mix the above-mentioned PVA aqueous solution and GG solution, and after stirring into a uniform and transparent solution, cast the mixed solution into a plastic disc, and dry it naturally to form a film;
[0038] 4) Peel off the film and place it in an oven at 150°C for physical cross-linking for 1 hour, then immerse the film in 40 mL of 10% glutaraldehyde (GA, 50wt%) and 2-thiophene formaldehyde (TCA, 98wt%) containing a small amount of hydrochloric acid (The volume ratio of TCA to GA is =1:3, 1:4, 1:5, 1:6, 1:7) in acetone (>99.5wt%) solution, the chemical cross-linking reaction is carried out at room temp...
Example Embodiment
[0040] Example 3
[0041] A method for preparing high-strength binary cross-linked basic anion exchange composite membrane:
[0042] 1) Dissolve 2g of PVA powder in 100mL of deionized water, heat and stir at 90°C to a transparent and homogeneous solution to prepare a 2% PVA stock solution;
[0043] 2) Configure GG solution according to the mass ratio of PVA to GG=1:0.5;
[0044] 3) Mix the above-mentioned PVA aqueous solution and GG solution, stir to form a uniform transparent solution, cast the mixed solution into a plastic disc, and dry it naturally to form a film;
[0045] 4) Peel off the film and place it in an oven at 150℃ for physical cross-linking for 1 hour, and then immerse the film in 35mL 10% glutaraldehyde (GA, 50wt%) containing a small amount of hydrochloric acid and 7-methoxy-3,72 Methyloctanal (MDO, 98wt%) (volume ratio of MDO to GA = 1:3, 1:4, 1:5, 1:6, 1:7) in acetone (>99.5wt%) solution, room temperature After carrying out the chemical cross-linking reaction for 4 ho...
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