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Method for preparing homogeneous phase ion exchange membrane

A technology of homogeneous ion exchange and ion exchange membrane, applied in the field of preparation of homogeneous ion exchange membrane, can solve the problems of high membrane brittleness, poor acid and alkali resistance, etc., and achieves low membrane resistance, low production cost, and mechanical strength. high effect

Inactive Publication Date: 2015-05-13
SHANDONG TIANWEI MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the electrochemical performance of the homogeneous ion-exchange membrane prepared by this method is better, the resulting membrane is more brittle due to the rigidity of the glycidyl methacrylate polymer.
At the same time, due to the presence of ester bonds, the acid and alkali resistance of the membrane is poor.

Method used

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  • Method for preparing homogeneous phase ion exchange membrane
  • Method for preparing homogeneous phase ion exchange membrane
  • Method for preparing homogeneous phase ion exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Membrane liquid preparation: Mix 5.3700 g of glycidyl methacrylate, 15.7309 g of styrene, 1.5210 g of divinylbenzene and 0.3256 g of azobisisobutyronitrile to prepare a uniform solution to obtain a membrane liquid. The molar ratio of glycidyl methacrylate to styrene is 0.25:1, the molar ratio of divinylbenzene to functional monomer is 5:100, and the amount of initiator is 1% of the sum of moles of functional monomer and crosslinking agent .

[0026] (2) Membrane liquid adsorption: UHMWPE porous membrane with a pore size of 0.9 μm, a porosity of 85%, and a thickness of 70 μm was used as the substrate, and the substrate was immersed in the membrane solution prepared in step (1) for 30 min After it is fully impregnated, take out the substrate and place it between two polyethylene terephthalate films. If there are air bubbles between the substrate and the film, roll the film to remove the air bubbles between the substrate and the film. The base material and the two fil...

Embodiment 2

[0030] (1) Membrane liquid preparation: Mix 7.5180 g of glycidyl methacrylate, 12.8469 g of styrene, 3.4929 g of ethylene glycol dimethacrylate and 0.6367 g of azobisisobutyronitrile, and prepare a uniform solution to obtain Membrane fluid. The molar ratio of glycidyl methacrylate to styrene is 0.43:1, the molar ratio of ethylene glycol dimethacrylate to functional monomer is 10:100, and the amount of initiator is equal to the molar number of functional monomer and crosslinking agent. and 2%.

[0031] (2) Membrane liquid adsorption: UHMWPE porous membrane with a pore size of 0.9 μm, a porosity of 85%, and a thickness of 70 μm was used as the substrate, and the substrate was immersed in the membrane solution prepared in step (1) for 30 min After it is fully impregnated, take out the substrate and place it between two polyethylene terephthalate films. If there are air bubbles between the substrate and the film, roll the film to remove the air bubbles between the substrate and t...

Embodiment 3

[0035] (1) Membrane solution preparation: Mix 9.6660 g of glycidyl methacrylate, 106183 g of styrene, 1.3689 g of divinylbenzene and 0.1465 g of azobisisobutyronitrile to prepare a uniform solution to obtain a membrane solution. The molar ratio of glycidyl methacrylate to styrene is 0.67:1, the molar ratio of divinylbenzene to functional monomer is 5:100, and the amount of initiator is 0.5% of the sum of moles of functional monomer and crosslinking agent .

[0036] (2) Membrane liquid adsorption: UHMWPE porous membrane with a pore size of 0.9 μm, a porosity of 85%, and a thickness of 70 μm was used as the substrate, and the substrate was immersed in the membrane solution prepared in step (1) for 30 min After it is fully impregnated, take out the substrate and place it between two polyethylene terephthalate films. If there are air bubbles between the substrate and the film, roll the film to remove the air bubbles between the substrate and the film. The base material and the two ...

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Abstract

The invention discloses a method for preparing a homogeneous phase ion exchange membrane. The method comprises the following steps: (1) blending a functional monomer, a cross-linking agent and an initiator into a uniform solution, thereby obtaining a membrane liquid; (2) soaking a substrate into the membrane liquid to impregnate, taking out the substrate, and clamping between two thin clamps, thereby forming a composite body; (3) enabling the initiator to initialize polymerization reaction on the composite body at 60-120 DEG C, and peeling off the two thin clamps, thereby obtaining a polymerized membrane; (4) putting the polymerized membrane into a chlorosulfonic acid chloroform solution for sulfonation treatment, after the sulfonation treatment, soaking in a NaCl solution, after being soaked, washing with water, and drying, thereby obtaining a Na type cation exchange membrane, or putting the polymerized membrane into a trimethylamine solution, performing amination treatment at 20-40 DEG C, after the amination treatment, soaking in the NaCl solution, after being soaked, washing with water, and drying, thereby obtaining a Cl type anion exchange membrane. The cation exchange membrane prepared by using the method is low in surface resistance, high in transference number and relatively high in selectivity.

Description

technical field [0001] The invention belongs to the field of membrane technology, and in particular relates to a method for preparing an ion exchange membrane by sulfonating or aminating a combination of glycidyl methacrylate and styrene as a functional monomer. Background technique [0002] With the emergence of new ion exchange membranes and the introduction of exchange resin packed bed technology, electrodialysis technology presents broad application prospects, mainly used for desalination of seawater, preparation of high-purity water for the electronics industry, boiler feed water and primary pure water for industrial use. Whey desalination, chlor-alkali industry, electroplating industry rinse water recycling and metal recovery, electrophoretic paint rinse water treatment, paper industry wastewater treatment, etc. [0003] The ion exchange membrane is an important part of the electrodialyzer. Due to its unique charging characteristics, ion exchange membrane technology p...

Claims

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Application Information

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IPC IPC(8): C08J5/22C08J7/12C08J7/04C08L33/14C08L25/14C08F220/32C08F212/08C08F222/14C08F212/36B01D71/40B01D71/28B01D67/00B01D69/02B01J41/14B01J39/20
Inventor 傅荣强张盼连文玉
Owner SHANDONG TIANWEI MEMBRANE TECH
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