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Preparation method for antibacterial and anti-pollution polymer separation membrane based on surface grafting

A surface grafting and separation membrane technology, which is applied in semipermeable membrane separation, chemical instruments and methods, membranes, etc., can solve the problems of insufficient modifier coverage and poor modification efficiency, achieving high success rate and easy operation , The effect of simple process

Inactive Publication Date: 2018-02-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with graft polymerization and other methods, the main defect of bulk modification is that the coverage of the modifier on the membrane surface is insufficient, and the modification efficiency is not good.

Method used

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  • Preparation method for antibacterial and anti-pollution polymer separation membrane based on surface grafting
  • Preparation method for antibacterial and anti-pollution polymer separation membrane based on surface grafting
  • Preparation method for antibacterial and anti-pollution polymer separation membrane based on surface grafting

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Soak commercial polyvinylidene fluoride membranes in isopropanol aqueous solution for 30 min, rinse with deionized water, and soak in deionized water for 12 h; dissolve 800 mg of dopamine hydrochloride in 40 mL of N,N-dimethylacetamide After degassing, add 0.26 mL of 2-bromoisobutyryl bromide and 0.3 mL of triethylamine, stir to make it fully react to obtain solution I, the reaction process is as follows figure 1 shown;

[0031] (2) Mix the solution I with the buffer, and immediately pour it into the mold where the polymer separation membrane is placed for reaction to obtain the polymer separation membrane of the grafted initiator. The polymerization process of the initiator on the membrane is as follows: figure 2 shown;

[0032] (3) Add 6 mL of acryloyloxyethyltrimethylammonium chloride, 0.004 g of copper chloride, and 0.028 g of tris(2-pyridylmethyl)amine into the film of the grafting initiator, seal the film for shading, and remove oxygen before adding 0.4 g a...

Embodiment 2

[0036](1) Soak commercial polyvinylidene fluoride membranes in isopropanol aqueous solution for 30 min, rinse with deionized water, and soak in deionized water for 12 h; dissolve 800 mg of dopamine hydrochloride in 40 mL of N,N-dimethylacetamide After degassing, add 0.4mL 2-bromoisobutyryl bromide and 0.4mL triethylamine, stir to make it fully react to obtain solution I, the reaction process is as follows figure 1 shown;

[0037] (2) Mix the solution I with the buffer, and immediately pour it into the mold where the polymer separation membrane is placed for reaction to obtain the polymer separation membrane of the grafted initiator. The polymerization process of the initiator on the membrane is as follows: figure 2 shown;

[0038] (3) Add 6 mL of acryloyloxyethyltrimethylammonium chloride, 0.004 g of copper chloride, and 0.028 g of tris(2-pyridylmethyl)amine into the film of the grafting initiator, seal the film for shading, and remove oxygen before adding 0.4 g ascorbic ac...

Embodiment 3

[0042] (1) Soak commercial polyvinylidene fluoride membranes in isopropanol aqueous solution for 30 min, rinse with deionized water, and soak in deionized water for 12 h; dissolve 800 mg of dopamine hydrochloride in 40 mL of N,N-dimethylacetamide After degassing, add 0.26 mL of 2-bromoisobutyryl bromide and 0.3 mL of triethylamine, stir to make it fully react to obtain solution I, the reaction process is as follows figure 1 shown;

[0043] (2) Mix the solution I with the buffer, and immediately pour it into the mold where the polymer separation membrane is placed for reaction to obtain the polymer separation membrane of the grafted initiator. The polymerization process of the initiator on the membrane is as follows: figure 2 shown;

[0044] (3) Add 9 mL of acryloyloxyethyltrimethylammonium chloride, 0.004 g of copper chloride and 0.028 g of tris(2-pyridylmethyl)amine to the film of the grafting initiator, seal the film with light-shielding, and remove oxygen. Add 0.4 g asco...

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Abstract

The invention relates to a preparation method for a polymer separation membrane with high-efficiency persistent antibacterial and anti-pollution effects, and belongs to the scientific and technical fields of water treatment and membrane separation. According to the invention, through an electron transfer activation regeneration catalyst atom transfer free radical polymerization method, a quaternary ammonium salt is grafted at the surface of the polymer separation membrane, so that the anti-pollution performance of the polymer separation membrane can be effectively improved, the polymer separation membrane modified by the method has obvious inhibiting effects on reproduction of bacteria and microorganisms and good antibacterial performance, and the modified membrane has good separation performance and long-term stable antibacterial and anti-pollution effects. The method is simple in process, green and environmentally friendly, and the method can be operated under the lower content of acatalyst; and the polymer separation membrane has stronger operability in practical industrial production and potential and wide application value in the field of water treatment.

Description

technical field [0001] The invention relates to a preparation method of a polymer separation membrane with high-efficiency and sustained antibacterial and anti-pollution effects, and belongs to the field of water treatment and membrane separation science and technology. Background technique [0002] Membrane separation technology has the advantages of good solid-liquid separation effect, good effluent quality, and small footprint, and has broad application prospects in the field of water and sewage treatment. Then, the disadvantage of membrane separation technology is that the membrane is easy to foul, which is one of the technical obstacles in the application of membrane separation technology. Membrane fouling control, stable operation of the membrane separation process, and improvement of the technical and economic performance of the membrane separation process are technical issues to be solved urgently in the membrane separation process. [0003] In the membrane separati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/82B01D69/02B01D67/00
CPCB01D67/0093B01D69/02B01D71/82B01D2325/48
Inventor 王志伟张星冉平梦文越陈妹陈颖青翟艺霞吴志超
Owner TONGJI UNIV
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