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Preparation method of cation exchange membrane with multiple crosslinked structures

A cation exchange membrane and anion exchange membrane technology, applied in cation exchange, ion exchange, chemical instruments and methods, etc., can solve the problems affecting the mechanical properties and electrochemical properties of the membrane, improve the anti-swelling performance, expand the application range, The effect of mild reaction conditions

Active Publication Date: 2019-04-09
SHANDONG TIANWEI MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] After introducing sulfonic acid groups on the main chain or side chain of polysulfone, the cation exchange membrane prepared will swell in water without crosslinking, which will affect the mechanical and electrochemical properties of the membrane.

Method used

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  • Preparation method of cation exchange membrane with multiple crosslinked structures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Bisphenol A polysulfone sulfonylation:

[0034] Add 60.0g bisphenol A polysulfone to a dry four-necked flask, then add 500.0ml dichloroethane, stir to completely dissolve bisphenol A polysulfone; put 3.6818g sulfuryl chloride and 10ml dichloroethane into the dropping funnel At room temperature, the liquid in the dropping funnel was slowly added dropwise to the dichloroethane solution of bisphenol A polysulfone, and the dropping time was 10 minutes. Scrape the modified bisphenol A polysulfone solution on a flat plate and dry it at 60°C to remove the solvent to obtain a modified bisphenol A polysulfone solid.

[0035] (2) Monomer solution preparation:

[0036] Add 7.8245g of N-methylpyrrolidone, 3.1854g of divinylbenzene, 0.1429g of 4-vinylpyridine and 9.8555g of ethyl methacrylate sulfonate into the beaker, then add 0.0552g of azobisisobutyronitrile and stir until completely dissolved to obtain a monomer solution.

[0037] (3) Membrane solution preparation:

[00...

Embodiment 2

[0049] (1) Bisphenol A polysulfone sulfonylation:

[0050] Add 60.0g bisphenol A polysulfone to a dry four-necked flask, then add 500.0ml dichloroethane, stir to completely dissolve bisphenol A polysulfone; put 3.6818g sulfuryl chloride and 10.0ml dichloroethylene into the dropping funnel At room temperature, the liquid in the dropping funnel was slowly added dropwise to the dichloroethane solution of bisphenol A polysulfone, and the dropwise addition time was 10 minutes. After the dropwise addition was completed, the reaction was continued at room temperature for 4 h; after the reaction was completed, Modified bisphenol A polysulfone solution: scrape the modified bisphenol A polysulfone solution on a flat plate and dry it at 60°C to remove the solvent to obtain a modified bisphenol A polysulfone solid.

[0051] (2) Monomer solution preparation:

[0052] Add 6.5205g N-methylpyrrolidone, 3.1854g divinylbenzene, 0.2144g 4-vinylpyridine and 9.8555g ethyl methacrylate sulfonate i...

Embodiment 3

[0061] (1) Bisphenol A polysulfone sulfonylation:

[0062] Add 60.0g bisphenol A polysulfone to a dry four-necked flask, then add 500.0ml dichloroethane, stir to completely dissolve bisphenol A polysulfone; put 2.7614g sulfuryl chloride and 10.0ml dichloroethylene into the dropping funnel At room temperature, the liquid in the dropping funnel was slowly added dropwise to the dichloroethane solution of bisphenol A polysulfone, and the dropwise addition time was 10 minutes. After the dropwise addition was completed, the reaction was continued at room temperature for 4 h; after the reaction was completed, Modified bisphenol A polysulfone solution, drying the modified bisphenol A polysulfone solution at 60° C. to remove the solvent to obtain a modified bisphenol A polysulfone solid.

[0063] (2) Monomer solution preparation:

[0064] Add 6.4118g of N-methylpyrrolidone, 2.1467g of divinylbenzene, 0.1445g of 4-vinylpyridine and 8.5395g of ethyl methacrylate sulfonate into the beake...

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Abstract

The invention discloses a preparation method of a cation exchange membrane with multiple crosslinked structures. The preparation method comprises the following steps: dissolving bisphenol A polysulfone after sulfonylation modification in an organic solvent to form a solution; uniformly mixing ethyl methacrylate sulfonate, 4-vinyl pyridine, a crosslinking agent, the organic solvent and an initiatorto form a monomer solution, and mixing the solution with the monomer solution to form a membrane solution; and clamping supporting cloth between two sheets to be thermally treated, and peeling the sheets after thermal treatment to obtain the cation exchange membrane. The cation exchange membrane prepared by the method has the advantages of being low in resistance, high in transference number, good in swelling behavior resistance and solvent resistance and the like, and is suitable for an electrodialysis process.

Description

technical field [0001] The invention relates to a preparation method of a cation exchange membrane, in particular to a kind of polymer material bisphenol A polysulfone (PSU) as the base material, introducing active groups through sulfonylation, and monomers with sulfonic acid groups and The cross-linking agent is blended, polymerized and cross-linked to form a three-dimensional network structure. The cross-linked cation exchange membrane has good solvent resistance and dimensional stability, and is suitable for electrodialysis process. Background technique [0002] Since Juda and McRac of American Ionics Company in 1950, and Winger of Rohm Company in 1953 invented ion-exchange membranes with excellent performance, ion-exchange membranes and related technologies have developed rapidly. In the 1960s, Asahi Kasei Corporation of Japan realized the industrialization of salt production from seawater with monovalent ion exchange membranes; in the 1970s, Du Pont Corporation develope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/82B01D67/00B01D61/44B01D61/42B01J39/19
CPCB01D61/422B01D61/44B01D67/0002B01D71/82B01D2325/42B01J39/19
Inventor 李晓玉
Owner SHANDONG TIANWEI MEMBRANE TECH
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