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Method for preparing antimicrobial polymer separation membrane

A technology of polymer and separation membrane, applied in the field of separation membrane, can solve the problems of low utilization rate of antibacterial substances, single antibacterial effect, etc., and achieve the effect of excellent antibacterial effect, good long-term stability, and prevention of loss.

Inactive Publication Date: 2011-01-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The prior art also has the following deficiencies: 1) the antibacterial film is prepared by bulk modification, and the utilization rate of a large amount of antibacterial substances in the film body is not high; 2) only a single positively charged substance such as silver nanoparticles or quaternary ammonium salts is used antibacterial effect

Method used

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  • Method for preparing antimicrobial polymer separation membrane

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Effect test

Embodiment 1

[0023] PDMAEMA is introduced into the surface of the polypropylene flat film by graft polymerization to prepare a base film containing a PDMAEMA surface modification layer, wherein the weight of the PDMAEMA is 10% of the total weight of the base film. The graft polymerization is carried out as follows: immerse the polypropylene flat film in the n-heptane solution of the photoinitiator benzophenone with a concentration of 0.001mol / L, let it dry naturally after 1 hour, and then immerse the film in the monomer volume concentration In a 10% dimethylaminoethyl methacrylate (DMAEMA) solution, take it out after 20 minutes of ultraviolet light irradiation, dry after cleaning, and obtain a substrate containing a polydimethylaminoethyl methacrylate modification layer. membrane.

[0024] Soak the base film in a silver nitrate aqueous solution with a concentration of 0.01mol / L for 30 minutes, take it out and immerse it in a sodium borohydride aqueous solution with a concentration of 0.2mo...

Embodiment 2

[0026] PDMAEMA is introduced into the surface of the polypropylene hollow fiber membrane by plasma treatment to prepare a base membrane containing a PDMAEMA surface modification layer, wherein the weight of the PDMAEMA is 10% of the total weight of the base membrane. The method of introducing PDMAEMA by plasma treatment is as follows: the polymer PDMAEMA is dissolved in acetone to make a polymer solution with a concentration of about 5g / L, then the polypropylene hollow fiber membrane is immersed in the solution, shaken at room temperature for 3 hours and then taken out to air dry, and then treated in an atmospheric pressure plasma apparatus for 30 seconds, washed and dried to obtain a base film containing a polydimethylaminoethyl methacrylate modification layer.

[0027] Soak the basement film in an aqueous silver nitrate solution with a concentration of 0.01mol / L for 30 minutes, take it out and immerse it in an aqueous solution of sodium ascorbate with a concentration of 0.2mo...

Embodiment 3

[0029] PDMAEMA is introduced into the surface of the polyethylene flat film by plasma treatment to prepare a base film containing a PDMAEMA surface modification layer, wherein the weight of the PDMAEMA is 1% of the total weight of the base film. The method of introducing PDMAEMA by plasma treatment is as follows: the polymer PDMAEMA is dissolved in acetone to make a polymer solution with a concentration of about 5g / L, and then the polyethylene flat film is immersed in the solution, shaken at room temperature for 10 minutes, and then taken out to dry , and then treated in an atmospheric pressure plasma apparatus for 10 seconds, washed and dried to obtain a base film containing a polydimethylaminoethyl methacrylate modification layer.

[0030] Soak the base film in a silver nitrate aqueous solution with a concentration of 1mol / L for 1 minute; take it out and immerse it in a sodium borohydride aqueous solution with a concentration of 1mol / L for 1 minute; then immerse it in a cross...

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Abstract

The invention discloses a method for preparing an antimicrobial polymer separation membrane, which comprises the following steps of: (1) selecting a polymer separation membrane containing a dimethylaminoethyl methacrylate surface modification layer as a basement membrane; and (2) soaking the basement membrane in aqueous solution of silver nitrate and aqueous solution of sodium borohydride in turn, taking out, soaking in cross-linking agent solution for quaternization and in-situ cross-linking reaction, taking out, cleaning, and drying to obtain the antimicrobial polymer separation membrane, wherein a reducing agent is sodium borohydride or sodium ascorbate; and a cross-linking agent is on ore more of alpha,alpha'-dichloro-p-xylen, 1,2-dibromoethane, 1,3-dibromopropane, and 1,4-dibromobutane. The polymer separation membrane prepared by the method fully utilizes the antibacterial performance of silver nanoparticles and quaternized dimethylaminoethyl methacrylate, and has excellent antimicrobial effect.

Description

technical field [0001] The invention relates to the field of separation membranes, in particular to a method for preparing an antibacterial polymer separation membrane that generates silver nanoparticles in situ and forms a quaternized surface. Background technique [0002] Polymer separation membranes are widely used in water treatment, medical treatment, industrial filtration and other fields. During use, bacteria can easily multiply on the surface of the polymer separation membrane and cause biological contamination, resulting in a significant decrease in membrane flux, deterioration in separation performance, shortened membrane life, and even accidents. For example, when polymer separation membranes are used in medical procedures such as hemodialysis, the current method is to sterilize the separation membranes by steam or γ-rays before clinical use. Invasive operations such as agents (such as heparin) and the influence of the external environment, so the polymer separat...

Claims

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Application Information

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IPC IPC(8): B01D71/40B01D71/26B01D71/68B01D71/42B01D71/72B01D71/10B01D71/34B01D69/02B01D67/00
Inventor 徐志康万灵书王芳
Owner ZHEJIANG UNIV
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