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Method for modifying hydroophilicity of highly active separation membrane made from polymer

A separation membrane and polymer technology, applied in chemical instruments and methods, semi-permeable membrane separation, membrane technology, etc., can solve the problems of poor hydrophilicity, complexity and easy contamination of polymer separation membranes

Inactive Publication Date: 2004-10-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly solves the technical problems of existing polymer separation membranes such as poor hydrophilicity, small water flux, easy static charge, easy pollution, complex process, and difficulty in industrialized production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step 1: Take a required amount of polypropylene hollow fiber microfiltration membrane with a porosity of about 40% and an average pore diameter of 0.07 micron, and wash it with acetone for 3 times to remove impurities adsorbed on the membrane surface. The treated membrane was vacuum-dried at room temperature for 3 hours and set aside. Dissolve the required amount of allyl glucose in dimethylformamide to make solutions with different concentrations. Take the required amount of microfiltration membrane washed with acetone and immerse in the allyl glucose solution overnight, then take out the microfiltration membrane, evaporate the solvent under normal pressure at 30 ° C, and obtain the grafted monomer (glycosyl Compound) microfiltration membrane;

[0020] Step 2, placing the monomer-coated microfiltration membrane in the chamber of the plasma processing machine, vacuuming, and adjusting the vacuum degree to 60 Pa by passing nitrogen gas. Turn on the power supply of the ...

Embodiment 2

[0023] Step 1, take a required amount of polyethylene hollow fiber microfiltration membrane (porosity about 55%, average pore diameter 0.25 micron), wash 3 times with acetone, to remove impurities adsorbed on the membrane surface. The treated membrane was vacuum-dried at room temperature for 3 hours and set aside. Dissolve the required amount of allyl galactose in dimethylformamide to make a solution with the required concentration. Weigh the required amount of polyethylene hollow fiber microfiltration membrane washed with acetone and immerse in the allyl sucrose solution overnight, then take out the polyethylene hollow fiber microfiltration membrane, and evaporate the solvent at 30°C under normal pressure.

[0024] Step 2, placing the monomer-coated polyethylene hollow fiber microfiltration membrane in a corona treater, turning on the power of the treater, and performing corona radiation treatment. After irradiating for a period of time, turn off the power, take out the memb...

Embodiment 3

[0026] Step 1, take the required amount of polyethersulfone ultrafiltration membrane (molecular weight cut off is 50000Dalton), and wash it with acetone for 3 times to remove the impurities adsorbed on the surface of the membrane. The treated membrane was vacuum-dried at room temperature for 3 hours and set aside. Dissolve the required amount of glucose ethoxy acrylate in deionized water to prepare solutions with different concentrations. Weigh the required amount of polyethersulfone ultrafiltration membrane washed with acetone and immerse it in the glucose ethoxy acrylate solution overnight, then take out the polyethersulfone ultrafiltration membrane and dry it at room temperature.

[0027] Step 2, the polyethersulfone ultrafiltration membrane coated with monomer is placed in a metered 5-35kGy 60 Gamma-ray radiation treatment was carried out in a Co source. After a period of irradiation, the polyethersulfone ultrafiltration membrane was removed from 60The Co source was tak...

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PUM

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Abstract

A process for hydrophilic modification of efficient separating polymer membrane includes coating the grafting monomer containing glycosyl compound on the surface of polymer membrane, evaporating solvent, and radiating said monomer for triggering graft reaction to modify said polymer membrane. Its advantages are high hydrophilic effect, and easy washing.

Description

technical field [0001] The invention relates to a method for surface modification of a polymer separation membrane, in particular to a method for surface modification of a hydrophobic polymer separation membrane material. Background technique [0002] Polyolefins such as polyethylene and polypropylene are low-cost polymer materials with excellent chemical and thermal stability. Polyolefin separation membranes prepared from them have been widely used in industry, agriculture, medicine, environmental protection, etc. It has made important contributions to saving energy, improving efficiency, and purifying the environment. However, the surface of polyolefin separation membranes has poor hydrophilicity and is easy to be charged with static electricity. These shortcomings restrict their further popularization and application. Graft modification on the surface of polyolefin separation membrane, using the function of introducing groups to improve the lack of surface performance of...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D71/78
Inventor 徐志康王树源寇瑞强杨谦刘振梅聂富强
Owner ZHEJIANG UNIV
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