Automatic assembling device and method of multilayer composite separation membrane

A multi-layer composite and automatic assembly technology, applied in the field of membrane separation, can solve the problems of cumbersome membrane-making procedures, unfavorable large-scale production, several or even ten hours, etc., and achieve abundant membrane-making materials and nano-scale membrane thickness. control, mild conditions

Inactive Publication Date: 2012-06-27
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of pervaporation composite membranes with good separation effect by traditional layer-layer adsorption method usually takes several or even ten hours, and the membrane making procedure is cumbersome, which is not conducive to the needs of large-scale production

Method used

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  • Automatic assembling device and method of multilayer composite separation membrane
  • Automatic assembling device and method of multilayer composite separation membrane
  • Automatic assembling device and method of multilayer composite separation membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The support body is polyacrylonitrile (PAN) material, flat ultrafiltration membrane, the molecular weight cut off is 20000, and the membrane area is 92cm 2 , the polycation material used is polyethyleneimine (PEI, molecular weight is 60,000), polyanion is polyacrylic acid (PAA, molecular weight is 4 million), and the solvent of polyethyleneimine and polyacrylic acid is deionized water.

[0045] Assembly conditions and methods:

[0046] (1) polyethyleneimine is made into 0.125wt% solution 2000ml with deionized water, is mixed with polycation solution through stirring, ultrasonic deaeration; With deionized water, polyacrylic acid is made into 0.025wt% solution 2000ml, through Stirring, ultrasonic defoaming to prepare polyanion solution;

[0047] (2) In order to charge the surface of the polyacrylonitrile-based membrane, conventional hydrolysis modification technology is adopted. First, the polyacrylonitrile ultrafiltration membrane is immersed in 2N NaOH solution for 30 ...

Embodiment 2

[0059] The support body is polyacrylonitrile (PAN) material, flat ultrafiltration membrane, the molecular weight cut off is 20000, and the membrane area is 92cm 2 , the polycation material used is polyethyleneimine (PEI, molecular weight is 60,000), polyanion is polyacrylic acid (PAA, molecular weight is 4 million), and the solvent of polyethyleneimine and polyacrylic acid is deionized water.

[0060] Assembly conditions and methods:

[0061] (1) polyethyleneimine is made into 0.125wt% solution 2000ml with deionized water, is mixed with polycation solution through stirring, ultrasonic deaeration; With deionized water, polyacrylic acid is made into 0.025wt% solution 2000ml, through Stirring, ultrasonic defoaming to prepare polyanion solution;

[0062] (2) In order to charge the surface of the polyacrylonitrile-based membrane, conventional hydrolysis modification technology is adopted. First, the polyacrylonitrile ultrafiltration membrane is immersed in 2N NaOH solution for 30 ...

Embodiment 3

[0074] The support body is polyacrylonitrile (PAN) material, flat ultrafiltration membrane, the molecular weight cut off is 20000, and the membrane area is 92cm 2 , the polycation material used is polyethyleneimine (PEI, molecular weight is 60,000), polyanion is polyacrylic acid (PAA, molecular weight is 4 million), and the solvent of polyethyleneimine and polyacrylic acid is deionized water.

[0075] Assembly conditions and methods:

[0076] (1) polyethyleneimine is made into 0.125wt% solution 2000ml with deionized water, is mixed with polycation solution through stirring, ultrasonic deaeration; With deionized water, polyacrylic acid is made into 0.025wt% solution 2000ml, through Stirring, ultrasonic defoaming to prepare polyanion solution;

[0077] (2) In order to charge the surface of the polyacrylonitrile-based membrane, conventional hydrolysis modification technology is adopted. First, the polyacrylonitrile ultrafiltration membrane is immersed in 2N NaOH solution for 30 ...

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Abstract

Belonging to the technical field of membrane separation, the invention provides an automatic assembling device and method of a multilayer composite separation membrane. Existing composite membranes prepared by an immersion layer-by-layer self-assembly method has the problems of a lot of composite layers, long film forming cycle, and complex procedures, and is not conducive to industrial production. The automatic assembling device and method of a multilayer composite separation membrane can respectively spray membrane making liquids of different components to the surface of a porous support body in order. And then through layer-by-layer reaction on the surface and assembly, the multilayer composite separation membrane can be formed. The automatic assembling device and method of a multilayer composite separation membrane in the invention can automatically complete spraying and assembly of membrane making liquids with different components, effectively overcome the complicated steps in existing self-assembly membrane forming processes, substantially shorten membrane forming time, and can be adapted to the demands of large scale production.

Description

technical field [0001] The invention relates to an automatic assembly device and method for a multilayer composite separation membrane, belonging to the technical field of membrane separation. Background technique [0002] Polyelectrolyte, also known as polymer electrolyte, refers to a polymer with many ionizable ionic groups in the main chain or side chain. Polyelectrolytes are widely used in the fields of flocculants, dispersants, superabsorbent resins, biomedicine and membrane materials because of their charge and most of them have good hydrophilicity. Polyelectrolytes can be divided into polycations, polyanions and amphoteric polyion electrolytes with positive and negative charges according to their charges. The polyelectrolyte composite membrane can be formed by the electrostatic force between two oppositely charged polyelectrolytes, by hydrogen bonds and hydrophobic interactions, or by the coordination between a polyelectrolyte and inorganic metal ions or small organi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D67/00
Inventor 张国俊唐海齐王任纪树兰
Owner BEIJING UNIV OF TECH
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