A method for preparing cross-linked polyacrylonitrile separation membrane by ultraviolet irradiation
A technology of polyacrylonitrile and separation membrane, which is applied in semi-permeable membrane separation, chemical instruments and methods, and membranes. Mild, good mechanical strength effect
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Embodiment 1
[0021] 1) Weigh 4.24g acrylonitrile, 0.286g allyl methacrylate, dissolve in 50g dimethyl sulfoxide, then add 0.07g initiator azobisisobutyronitrile and 0.04g chain transfer agent cysteine Hydrochloride, sealed with nitrogen protection, reacted in a water bath at 60°C for 4 hours, precipitated in ethanol, washed with ethanol and water for 3 times, dried in a vacuum oven at 60°C for 6 hours, and obtained the initial product;
[0022] 2) Weigh 0.4g of the initial product and dissolve it in 4.6g of dimethylsulfoxide, and add 10mg of cross-linking agent 3,6-dioxa-1,8-octanedithiol and 15mg of photoinitiator benzoin dimethyl ether to form Scraping liquid, use a 200μm spatula to scrape the film on the glass plate, and immediately put in 10μW / cm 2 After irradiating with ultraviolet light for 300s, the glass plate was transferred to water for phase inversion to form a film. Finally, soak and wash the obtained membrane with water for more than 12 hours to remove impurities such as unre...
Embodiment 2
[0024] 1) Weigh 4.24g of acrylonitrile and 0.143g of allyl methacrylate respectively, and dissolve them in 50g of dimethyl sulfoxide. Then add 0.07g of initiator azobisisobutyronitrile and 0.04g of chain transfer agent cysteamine hydrochloride, seal nitrogen protection, react in a water bath at 60°C for 4h, precipitate in ethanol, and use ethanol and water Washed three times respectively, and dried in a vacuum oven at 60°C for 6 hours to obtain the primary product;
[0025] 2) Weigh 0.4g of the initial product and dissolve it in 4.6g of dimethylsulfoxide, and add 5mg of cross-linking agent 3,6-dioxa-1,8-octanedithiol and 15mg of photoinitiator benzoin dimethyl ether to form Scraping liquid, use a 200μm spatula to scrape the film on the glass plate, and immediately put in 300μW / cm 2 Irradiate under UV light for 30s. Then the glass plate was transferred to water for phase inversion to form a film. Finally, soak and wash the obtained membrane with water for more than 12 hours,...
Embodiment 3
[0027] 1) Weigh 4.24g of acrylonitrile and 0.143g of allyl methacrylate respectively, and dissolve them in 50g of dimethyl sulfoxide. Then add 0.07g of initiator azobisisobutyronitrile and 0.04g of chain transfer agent cysteamine hydrochloride, seal nitrogen protection, react in a water bath at 60°C for 4h, precipitate in ethanol, and use ethanol and water Washed three times respectively, and dried in a vacuum oven at 60°C for 6 hours to obtain the primary product;
[0028] 2) Weigh 0.4g of the initial product and dissolve it in 4.6g of dimethyl sulfoxide, and add 5 mg of cross-linking agent (thioglycolic acid)-1,4-butylene diester and 15 mg of photoinitiator benzoin dimethyl ether to form a scraping solution , scrape the film on the glass plate with a 200μm spatula, and immediately put in 100μW / cm 2 Irradiate under UV light for 150s. Then the glass plate was transferred to water for phase inversion to form a film. Finally, soak and wash the obtained membrane with water for...
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