Preparation method for crosslinking modification membrane with non-woven fabrics as matrix
A technology of cross-linking modification and non-woven fabrics, which is applied in the direction of chemical instruments and methods, membranes, membrane technology, etc. It can solve the problems of cumbersome modification steps and difficult long-lasting modification effects, so as to achieve the goal of not being prone to secondary pollution and modification The effect of long-lasting and stable effect and good flux recovery performance
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Embodiment 1
[0020] 1) Weigh 13g of hydroxyethyl methacrylate and 0.126g of allyl methacrylate respectively, dissolve them in 52.5g of methanol, then add 16.4mg of initiator azobisisobutyronitrile, seal under nitrogen protection, and store at 60°C After reacting in a water bath for 6 hours, precipitate in ether, and dry in a vacuum oven at 60°C for 12 hours to obtain a prepolymer;
[0021] 2) Weigh 2g of prepolymer and dissolve it in 4.7g of methanol, and add 15.3mg of cross-linking agent 3,6-dioxa-1,8-octanedithiol and 21.4mg of photoinitiator benzoin dimethyl ether to form a scraper The film solution was scraped and coated on the non-woven fabric with a 200μm scraper, and immediately put in 2μW / cm 2 It was irradiated under ultraviolet light for 300s, and dried and stored at room temperature.
Embodiment 2
[0023] 1) Weigh 13g of hydroxyethyl methacrylate and 0.21g of allyl methacrylate respectively, dissolve them in 52.8g of methanol, then add 16.4mg of initiator azobisisobutyronitrile, seal under nitrogen protection, and store at 60°C After reacting in a water bath for 8 hours, precipitate in ether, and dry in a vacuum oven at 60°C for 12 hours to obtain a prepolymer;
[0024] 2) Weigh 2g of prepolymer and dissolve it in 4.7g of methanol, and add 25.2mg of cross-linking agent 3,6-dioxa-1,8-octanedithiol and 35.5mg of photoinitiator benzoin dimethyl ether to form a scraper The film solution was scraped and coated on the non-woven fabric with a 200μm scraper, and immediately put in 2μW / cm 2 It was irradiated under ultraviolet light for 300s, and dried and stored at room temperature.
Embodiment 3
[0026] 1) Weigh 13g of hydroxyethyl methacrylate and 0.63g of allyl methacrylate respectively, dissolve them in 54.5g of methanol, then add 16.4mg of initiator azobisisobutyronitrile, seal under nitrogen protection, and store at 60°C After reacting in a water bath for 10 hours, precipitate in ether, and dry in a vacuum oven at 60°C for 12 hours to obtain a prepolymer;
[0027] 2) Weigh 2g of prepolymer and dissolve it in 4.7g of methanol, and add 73.5mg of cross-linking agent 3,6-dioxa-1,8-octanedithiol and 0.1g of photoinitiator benzoin dimethyl ether to form a scraper The film solution was scraped and coated on the non-woven fabric with a 200μm scraper, and immediately put in 2μW / cm 2 It was irradiated under ultraviolet light for 300s, and dried and stored at room temperature.
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