Bio-adhesion-resistant porous separation membrane as well as preparation method and application thereof

A porous separation membrane, anti-biological technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the complex preparation method, high price of zwitterionic monomers, and harsh polyethersulfone sulfonation process. problem, to achieve the effect of simple process

Active Publication Date: 2015-05-13
SUZHOU FAITH HOPE MEMBRANE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Blending sulfonated polyethersulfone and polyethersulfone to form a membrane can obtain a polyethersulfone separation membrane with good hydrophilicity, which has been applied in engineering. The disadvantage is that the polyethersulfone sulfonation process is harsh.
The usual solution is to initiate the surface polymerization of sulfonic acid or carboxylic acid betaine monomers on the surface of the separation membrane, or cross-link polymerization of phosphorylcholine monomers and other monomers. The defect of this approach is that it is necessary to synthesize various amphoteric Ionic monomers, the preparation method is complicated, resulting in high prices of zwitterionic monomers, especially phosphorylcholine monomers are very expensive

Method used

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  • Bio-adhesion-resistant porous separation membrane as well as preparation method and application thereof
  • Bio-adhesion-resistant porous separation membrane as well as preparation method and application thereof
  • Bio-adhesion-resistant porous separation membrane as well as preparation method and application thereof

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preparation example Construction

[0027] The preparation method of the anti-bioadhesion porous separation membrane: the polymer porous membrane containing epoxy groups on the surface is soaked in the solution containing amino acids, and the epoxy ring-opening reaction is carried out under the alkaline condition of pH 8-13, and the temperature is 20 The reaction is carried out at 0°C to 100°C for 0.5 hours to 24 hours, and then the pH is adjusted to 5-9 to obtain an anti-bioadhesion porous separation membrane of amino acid zwitterions containing amino cations and carboxylate anions on the surface.

[0028] The application of the anti-bioadhesion porous separation membrane in separation and purification is to package the anti-bioadhesion porous separation membrane together with the shell and process it into a complete separation system for water purification, chemical separation and purification, drug separation and purification, and hemodialysis.

[0029] A kind of anti-bioadhesion porous separation membrane of ...

Embodiment 1

[0044] Embodiment 1 (comparative example)

[0045] Preparation of polyethersulfone separation membrane

[0046] Polyethersulfone and polyvinylpyrrolidone were vacuum-dried at 60°C for 12 hours before use. Weigh 10g of N,N-dimethylacetamide, weigh 0.2g of polyvinylpyrrolidone and dissolve it in N,N-dimethylacetamide at room temperature, wait until it is completely dissolved, weigh 1.6g of polyethersulfone and dissolve it in the mixed solution , fully stir to form a transparent and uniform casting solution, let it stand for 4 hours for degassing, pour the casting solution on a glass plate to scrape the film, place it in the air for 10-30 seconds, then put in water and isopropanol to solidify The film is formed in the bath, the volume ratio of water and isopropanol is 3:7, the film thickness is 200 μm, and soaked in deionized water for 24 to 36 hours to obtain the original polyethersulfone separation membrane with a porosity of 63%.

[0047] The obtained polyethersulfone separa...

Embodiment 2

[0049] Preparation of polyethersulfone porous membrane containing epoxy groups on the surface (comparative example)

[0050] Polyethersulfone and polyvinylpyrrolidone were vacuum-dried at 60°C for 12 hours before use. Weigh 1 g of N,N-dimethylacetamide into a 50 mL beaker, add 0.24 g of glycidyl methacrylate, 0.0016 g of 2-hydroxy-2-methyl-1-phenyl-1 acetone and 0.0016 g Ethylene glycol dimethacrylate, ultrasonically oscillate for 5 minutes until uniformly mixed; place the beaker under ultraviolet light with a wavelength of 365nm for 1 hour to obtain a mixed solution containing polyglycidyl methacrylate, and then add the mixed solution Add 9 grams of N,N-dimethylacetamide to the mixture, stir the mixture, weigh 0.08 grams of polyvinylpyrrolidone with a molecular weight of 300,000 as a porogen, add it to the mixture, stir at room temperature for 20 minutes until completely dissolved, and then add 1.6 grams Polyethersulfone, stir at room temperature for about 6 hours, mix evenl...

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Abstract

The invention discloses a bio-adhesion-resistant porous separation membrane as well as a preparation method and an application thereof. The bio-adhesion-resistant porous separation membrane is a flat plate type or hollow fiber type porous membrane with the zwitterion characteristic at about pH 7 after a porous polymer membrane with the surface containing epoxy groups and primary amino groups of amino acid have an epoxy ring-opening reaction. The preparation method comprises steps as follows: the porous polymer membrane with the surface containing the epoxy groups is soaked in a solution containing amino acid, the epoxy ring-opening reaction is conducted at a slightly alkaline condition, then the pH is adjusted to range from 5 to 9, and the bio-adhesion-resistant porous separation membrane with the surface containing amino cations and carboxylate radical anions is obtained. The separation membrane has the characteristic of bio-adhesion resistance and can be used for separation and purification.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, and in particular relates to an anti-bioadhesion porous separation membrane, a preparation method and an application. Background technique [0002] Polyethersulfone, polyacrylonitrile and polyvinylidene fluoride are excellent separation membrane materials, which have the advantages of high mechanical strength, good physical and chemical stability, excellent film-forming properties, cheap and easy to obtain, and are used in many fields such as water treatment and biological separation. Filtration field is widely used. However, polyethersulfone, polyacrylonitrile, and polyvinylidene fluoride have strong hydrophobicity, which can easily cause a large amount of adsorption of proteins and microorganisms on the surface of porous separation membranes, thereby blocking the membrane pores, causing serious membrane fouling, resulting in a decrease in membrane separation efficiency and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D71/42B01D71/12B01D71/26B01D71/38B01D71/56B01D71/28B01D71/30B01D71/48B01D71/34B01D69/06B01D69/08B01D67/00C02F1/44
Inventor 李新松谢彬彬姚琛李屹其他发明人请求不公开姓名
Owner SUZHOU FAITH HOPE MEMBRANE TECH
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