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Monovalent selective cation exchange membrane based on cross-linked quaternary polyaniline and preparation method of monovalent selective cation exchange membrane

A cation exchange membrane, polyaniline technology, applied in chemical instruments and methods, membrane, membrane technology and other directions, can solve the problem of lack of high-performance monovalent selective separation membrane, to ensure stability and selectivity, increase stability and The effect of compactness

Active Publication Date: 2019-01-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main development bottleneck lies in the lack of high-performance monovalent selective separation membranes

Method used

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  • Monovalent selective cation exchange membrane based on cross-linked quaternary polyaniline and preparation method of monovalent selective cation exchange membrane
  • Monovalent selective cation exchange membrane based on cross-linked quaternary polyaniline and preparation method of monovalent selective cation exchange membrane
  • Monovalent selective cation exchange membrane based on cross-linked quaternary polyaniline and preparation method of monovalent selective cation exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A commercial cation exchange membrane was used as the base membrane, and the commercial cation exchange membrane was purchased from Tokuyama Soda Co., Ltd., Japan, model CM-1.

[0021] Soak the surface of the basement membrane with 1 mol / L aniline monomer solution for 60 minutes, take out the basement membrane and use filter paper to blot the excess solution on the surface, and then soak in 1 mol / L ferric chloride solution for 60 minutes, the aniline monomer is under the action of ferric chloride An oxidative polymerization reaction occurred on the surface of the base film to form a polyaniline active layer, which was then placed on a heater at 60°C to dry, and then the film was immersed in a 5 g / L 1,2-dibromoethane solution for 6 h ( The solvent of the 1,2-dibromoethane solution is ethanol), and finally the base membrane is taken out from the 1,2-dibromoethane solution and washed repeatedly with pure water to obtain a cross-linked quaternized polyaniline monovalent sele...

Embodiment 2

[0027] The steps in the above example 1 are unchanged, but the 1,2-dibromoethane solution is changed to the 1,4-dibromobutane solution. The flux of the sodium-magnesium ion of embodiment 2 modified membranes is , the selective permeation value of the cross-linked quaternized polyaniline monovalent selective cation exchange membrane product obtained in this example reaches 3.52. A better selectivity was obtained.

Embodiment 3

[0029] The steps in the above example 1 are unchanged, but the 1,2-dibromoethane solution is changed to the 1,6-dibromohexane solution. The flux of the sodium-magnesium ion of embodiment 3 modified membranes is ), the selective permeation value of the cross-linked quaternized polyaniline monovalent selective cation exchange membrane product obtained in this example reaches 3.31.

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Abstract

The invention discloses a monovalent selective cation exchange membrane based on cross-linked quaternary polyaniline and a preparation method of the monovalent selective cation exchange membrane. Themonovalent selective cation exchange membrane based on cross-linked quaternary polyaniline comprises a cation exchange membrane and quaternary polyaniline prepared from a polymer and a quaternizationreagent through reaction, wherein the polymer is obtained from aniline and an oxidant after polymerization at the interface of the cation exchange membrane, the cation exchange membrane is a base membrane and the quaternary polyaniline is an active layer. By means of a cross-linked quaternary polyaniline active layer, the surface charge property of the base membrane is changed while compactness ofthe membrane is increased, and accordingly, selective separation of monovalent cations is achieved.

Description

technical field [0001] The invention belongs to the technical field of separation membrane materials, and relates to the development of membrane materials used in the field of water treatment, in particular to a cross-linked quaternized polyaniline monovalent selective cation exchange membrane and a preparation method thereof. Background technique [0002] With industrial progress and social development, water pollution has become increasingly serious and has become the world's number one environmental governance problem. Therefore, water treatment technology has received full attention. According to different treatment methods, there are biochemical methods such as activated sludge method, biological layering method, mixed biological method, etc.; physical and chemical methods, such as particle filtration method, activated carbon adsorption method, chemical Precipitation, membrane filtration / analysis, etc. Among them, electrodialysis has become an important branch of water...

Claims

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Application Information

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IPC IPC(8): B01D71/82B01D69/10B01D69/02B01D67/00B01D61/42
CPCB01D61/422B01D67/0006B01D69/02B01D69/10B01D71/82B01D2325/42
Inventor 潘杰峰郑瑜逄霄丁金成沈江南高从堦
Owner ZHEJIANG UNIV OF TECH
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