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Preparation method of hydrophilic separation membrane

A hydrophilic, separation membrane technology, used in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc. The effect of increased quantity, simple operation and mild reaction conditions

Active Publication Date: 2014-06-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the separation membrane prepared by coating method, interfacial polymerization method, etc., the support layer and the epidermis are bonded together through physical effects such as van der Waals force, and there is no chemical bond combined with the epidermal hydrophilic layer, which makes the membrane in the long-term operation process. The peeling between the surface layer and the support layer is easy to occur in the medium, which leads to the decrease of membrane performance.
In addition, because existing commercial membranes are easily fouled during use, resulting in decreased flux and increased membrane costs, more attention has been paid to the preparation of hydrophilic separation membranes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Soak the polysulfone support membrane in a 5% potassium persulfate solution for 2 hours at a reaction temperature of 40°C. After the reaction, the membrane was washed in clean water. Initiator cerium ammonium nitrate, monomer acrylamide and zwitterionic compound 3-(methacrylamido) propyl-dimethyl (3-sulfonic acid) ammonium hydroxide used in surface chemical reaction, and glutaraldehyde according to certain Proportion is made into reaction solution, wherein the concentration of initiator is 2×10 -3 mol / L, the concentration of the reaction monomer acrylamide is 5g / L. The mass ratio of the zwitterionic compound to acrylamide is 0:1, the mass fraction of glutaraldehyde in the reaction solution is 0.3%, and the mass fraction of sodium bisulfite is 0.1%. The washed membrane was soaked in the reaction solution at 40° C. for 4 hours to react. After the reaction is over, the membrane is washed for later use.

[0019] It is measured that the water contact angle of the prepare...

Embodiment 2

[0021] Soak the polysulfone support membrane in a 10% potassium persulfate solution for 2 hours at a reaction temperature of 40°C. After the reaction, the membrane was washed in clean water. Initiator cerium ammonium nitrate, monomer acrylamide and zwitterionic compound 3-(methacrylamido) propyl-dimethyl (3-sulfonic acid) ammonium hydroxide used in surface chemical reaction, and glutaraldehyde according to certain Proportion is made into reaction solution, wherein the concentration of initiator is 2×10 -3 mol / L, the concentration of the reaction monomer acrylamide is 5g / L, the mass ratio of zwitterionic compound and acrylamide is 2:1, and the mass fraction of glutaraldehyde is 1.0%. The washed membrane was soaked in the reaction solution at 20° C. for 4 hours to react. After the reaction is over, the membrane is washed for later use.

[0022] It is measured that the water contact angle of the prepared film is 43°, and the Na with 0.01mol / L 2 SO 4 The water flux of the hyd...

Embodiment 3

[0024] Soak the polysulfone support membrane in a 5% potassium persulfate solution for 2 hours at a reaction temperature of 40°C. After the reaction, the membrane was washed in clean water. Initiator cerium ammonium nitrate, reaction monomer acrylamide and zwitterionic compound 3-(methacrylamido) propyl-dimethyl (3-sulfonic acid) ammonium hydroxide used in surface chemical reaction, and glutaraldehyde according to A certain proportion is made into a reaction solution, in which the concentration of the initiator is 2×10 -3 mol / L, the concentration of the reaction monomer acrylamide is 5g / L, the mass ratio of zwitterionic compound and acrylamide is 6:1, the mass fraction of glutaraldehyde is 1.0%, and the mass fraction of sodium bisulfite is 0.3% . The washed membrane was soaked in the reaction solution at 40° C. for 10 hours to react. After the reaction is over, the membrane is washed for later use.

[0025] It is measured that the water contact angle of the prepared film i...

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Abstract

The invention discloses a preparation method of a hydrophilic separation membrane. The separation membrane comprises a basement membrane support layer and a hydrophilic separation membrane layer. According to the method, by membrane surface chemical reaction, a hydrophilic substance is introduced into hydroxylated-treated basement membrane support layer surface to form the hydrophilic separation membrane layer. The separation membrane has a good hydrophilic property and high pure water flux. The preparation method of the hydrophilic separation membrane is a simple, effective and practical membrane preparation method. The separation membrane can be used in water treatment, food, pharmaceuticals, petrochemical industry and other fields.

Description

technical field [0001] The invention belongs to the field of organic separation membranes, and relates to a preparation method of a hydrophilic separation membrane. Background technique [0002] Membrane separation technology, as an emerging high-efficiency separation method, has been widely used in food, medicine, textile, electronics, petroleum, water treatment and other fields. With the continuous development of industry, the problems of energy shortage and environmental pollution have become increasingly prominent, especially the pollution of water resources, which seriously threatens the safety of human water use. The World Health Organization survey shows that 80% of the world's diseases and 33% of deaths are related to the pollution of drinking water. Therefore, the development and application of water treatment technology, especially membrane separation technology is becoming more and more important. [0003] At present, the hydrophilic separation membranes that ha...

Claims

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Application Information

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IPC IPC(8): B01D69/10B01D67/00B01D71/68B01D71/36
Inventor 曹义鸣李霞于海军康国栋刘健辉周美青刘丹丹袁权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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