Pollen silicon loading nanosilver modified separation membrane and preparation method thereof
A separation membrane and nano-silver technology, which is applied in semi-permeable membrane separation, chemical instruments and methods, membranes, etc., can solve the problem that the separation membrane cannot maintain high antibacterial efficiency for a long time, the release rate of silver ions is difficult to control, and the loading capacity of nano-silver is limited. and other problems, to achieve the effect of improving anti-pollution ability, easy industrial implementation, and high-efficiency and long-lasting antibacterial performance
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Embodiment 1
[0036] Preparation of pollen silicon-supported silver-modified polyvinylidene fluoride membrane:
[0037] (1) Dissolve 0.2wt.% resorcinol and 0.25wt.% formaldehyde in ethanol aqueous solution, stir under the catalysis of ammonia water for 6h to form spherical phenolic resin, wherein the mass fraction of ammonia water is 28% , the amount of ammonia water is 2wt.% of the ethanol aqueous solution; 0.8wt.% ethyl orthosilicate in the ethanol aqueous solution is added to the phenolic resin, and 0.5wt.% resorcinol and 0.62wt.% of the ethanol aqueous solution are added after 8 minutes. % formaldehyde, reacted for 2 hours, centrifuged, washed and dried, and burned at 550°C for 5 hours in the air atmosphere to obtain pollen silicon;
[0038] (2) dissolving pollen silicon in water (mass ratio of pollen silicon to water is 1:66) solution, under the catalysis of ammonia water, react with 0.75wt.% silver nitrate to pollen silicon aqueous solution for 24h, and the product is centrifuged, washe...
Embodiment 2
[0043] Preparation of pollen silicon-supported silver-modified polysulfone membrane:
[0044] (1) Dissolve 0.2wt.% resorcinol and 0.25wt.% formaldehyde in ethanol aqueous solution, stir under the catalysis of ammonia water for 6h to form spherical phenolic resin, wherein the mass fraction of ammonia water is 28% , the amount of ammonia water is 1wt.% of ethanol aqueous solution; 0.5wt.% methyl orthosilicate in ethanol aqueous solution is added to the phenolic resin, and 0.3wt.% resorcinol and 0.75wt.% ethanol aqueous solution are added again after 15min. % formaldehyde, reacted for 3 hours, centrifuged, washed and dried, and burned at 550°C for 5 hours in the air atmosphere to obtain pollen silicon;
[0045] (2) Dissolve pollen silicon in water (the mass ratio of pollen silicon to water is 1:55), react with 0.85wt.% silver nitrate to pollen silicon aqueous solution under the catalysis of ammonia water for 30h, and the product is centrifuged, washed and dried After drying, a s...
Embodiment 3
[0050] Preparation of pollen silicon-supported silver-modified polyvinylidene fluoride-polysulfone membrane:
[0051] (1) Dissolve 0.2wt.% resorcinol and 0.2wt.% formaldehyde in ethanol aqueous solution, stir under the catalysis of ammonia water for 6h to form spherical phenolic resin, wherein the mass fraction of ammonia water is 28% , the amount of ammonia water is 3wt.% of the ethanol aqueous solution; 0.5wt.% ethyl orthosilicate in the ethanol aqueous solution is added to the phenolic resin, and 0.7wt.% resorcinol and 0.55wt.% of the ethanol aqueous solution are added after 8 minutes. % formaldehyde, reacted for 2 hours, centrifuged, washed and dried, and burned at 550°C for 5 hours in the air atmosphere to obtain pollen silicon;
[0052] (2) Dissolve pollen silicon in water (the mass ratio of pollen silicon to water is 1:70), react with 0.68wt.% silver nitrate of pollen silicon aqueous solution under the catalysis of ammonia water for 18 hours, and the product is centrifu...
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