Ionic liquid functionalized PVA catalytic composite membrane and preparation method thereof
A technology of ionic liquid and composite membrane, applied in the field of materials science, can solve the problems of large amount of ionic liquid, easy to be corroded, difficult to recycle, etc., and achieve the effects of low price, high conversion rate, and easy control
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Embodiment example 1
[0029] (1) First take by weighing 3g of PVA solid powder (the degree of polymerization is 1750), add in the container that deionized water is housed, stir continuously at 90 ℃ to obtain the PVA solution that the mass fraction is 3%; Then, take by weighing 50g of PVA Put the solution in a beaker, add the crosslinking agent glutaraldehyde (0.05% of the PVA mass), stir evenly, filter out the insoluble impurities and let stand for defoaming to obtain the separation layer casting liquid, adjust the height of the scraper to 100 μm, and the scraping speed 50m·min -1 , carefully coat the casting solution on the substrate, and dry it at room temperature for 2 days to obtain a separation membrane;
[0030](2) get 30g mass fraction and be the PVA solution of 3%, add strongly acidic ionic liquid monomer 1-vinyl-3-sulfonic acid butylimidazole hydrochloride (the mol ratio of ILs and PVA is 0.1), place in 60 In a constant temperature water bath at ℃, under the protection of nitrogen, first ...
Embodiment example 2
[0034] (1) First take by weighing 5g of PVA solid powder (the degree of polymerization is 2050), add in the container that deionized water is housed, stir continuously at 95 ℃ to obtain the PVA solution that the mass fraction is 5%; Then, take by weighing 50g of PVA Solution, add cross-linking agent glutaraldehyde (0.1% of the mass of PVA), stir evenly, filter out insoluble impurities, stand for defoaming to obtain the separation layer casting solution, adjust the height of the scraper to 100 μm, and the scraping speed to 10m min -1 , carefully coat the casting solution on the substrate, and dry it at room temperature for 3 days to obtain a separation membrane;
[0035] (2) get 30g mass fraction and be the PVA solution of 5%, add strongly acidic ionic liquid monomer 1-vinyl-3-sulfonic acid propylimidazolium bisulfate (the mol ratio of ILs and PVA is 0.2), place in 75 In a constant temperature water bath at ℃, under the protection of nitrogen, first purging for 30min, then addi...
Embodiment example 3
[0039] (1) First weigh 10g of PVA solid powder (the degree of polymerization is 1750), add it into a container with deionized water, and continuously stir at 100°C to obtain a PVA solution with a mass fraction of 10%; then, weigh 30g of PVA Solution, add cross-linking agent maleic acid (0.1% of PVA quality), stir at room temperature, leave standstill defoaming after filtering out insoluble impurity to obtain separation layer cast film liquid, adjust scraper height to be 200 μ m, scrape film speed to be 5m. min -1 , carefully coat the casting solution on the substrate, dry it at room temperature for 2 days, and finally obtain a separation membrane with high separation performance;
[0040] (2) get 30g mass fraction and be the PVA solution of 8%, add strongly acidic ionic liquid monomer 1-ene butyl-3-sulfonic acid butylimidazole trifluoromethanesulfonate (the mol ratio of ILs and PVA is 0.3 ), placed in a constant temperature water bath at 80°C, under the protection of argon, f...
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