Mixed material for preparing polyethersulfone hollow fiber membrane and preparation method and application
A technology of mixed materials and polyethersulfone, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of poor hydrophilic stability and easy washing out, and achieve good biocompatibility and Effects of anti-fouling, hard to wash off, stable hydrophilicity and water wettability
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Embodiment 1
[0047] The mixed material of this example is mixed by the weight ratio of modified polyvinylpyrrolidone:polyethersulfone=1:15, wherein the modified polyvinylpyrrolidone is formed by the micro-crosslinking reaction of chitosan and polyvinylpyrrolidone. The mixed materials were prepared to obtain the polyethersulfone hollow fiber membrane of this example. Concrete, the preparation method of modified polyvinylpyrrolidone and polyethersulfone hollow fiber membrane is as follows:
[0048] Preparation of modified polyvinylpyrrolidone: dissolve 100g chitosan in 2.5L acetic acid solution, add 1400g polyvinylpyrrolidone, add 12g cerium amine nitrate while stirring at 60°C, add 10g glyoxal and cerium nitrate after cooling to room temperature The mass ratio of amine to glyoxal is 1.2:1. Stir evenly and heat up to 60°C, react for 4 hours, wash the reaction product with 2wt% acetic acid, isopropanol, and ultrapure water, and dry at 100°C to obtain modified polyvinylpyrrolidone, that is, c...
Embodiment 2
[0053] The mixed material of this example is mixed by the weight ratio of modified polyvinylpyrrolidone: polyethersulfone = 1:9, wherein the modified polyvinylpyrrolidone is formed by the micro-crosslinking reaction of chitosan and polyvinylpyrrolidone. The mixed materials were prepared to obtain the polyethersulfone hollow fiber membrane of this example. Concrete, the preparation method of modified polyvinylpyrrolidone and polyethersulfone hollow fiber membrane is as follows:
[0054] Preparation of modified polyvinylpyrrolidone: 100g chitosan was dissolved in 2.5L acetic acid solution, 500g polyvinylpyrrolidone was added, 27g cerium sulfate was added while stirring at 60°C, and 18g glutaraldehyde was added after cooling to room temperature. Stir evenly and heat up to 60°C, react for 5 hours, wash the reaction product with 2wt% acetic acid, isopropanol, and ultrapure water, and dry at 100°C to obtain modified polyvinylpyrrolidone.
[0055] Preparation of polyethersulfone hol...
Embodiment 3
[0058] The mixed material of this example is mixed by the weight ratio of modified polyvinylpyrrolidone:polyethersulfone=1:18, wherein the modified polyvinylpyrrolidone is formed by the micro-crosslinking reaction of chitosan and polyvinylpyrrolidone. The mixed materials were prepared to obtain the polyethersulfone hollow fiber membrane of this example. Concrete, the preparation method of modified polyvinylpyrrolidone and polyethersulfone hollow fiber membrane is as follows:
[0059] Preparation of modified polyvinylpyrrolidone: Dissolve 100g chitosan in 2.5L formic acid solution, add 2000g polyvinylpyrrolidone, add 32.5g cerium amine sulfate while stirring at 60°C, add 25g subaldehyde and cerium nitrate after cooling to room temperature The mass ratio of amine to glyoxal is 1.3:1. Stir evenly and heat up to 60°C, react for 4 hours, wash the reaction product with 2wt% acetic acid, isopropanol, and ultrapure water, and dry at 100°C to obtain modified polyvinylpyrrolidone.
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