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Fluorine-containing ion exchange membrane with reinforced sacrificial fiber mesh cloth

An ion-exchange membrane and sacrificial fiber technology, applied in the field of fluorine-containing ion-exchange multilayer membranes and their preparation, can solve problems such as reduced mechanical strength, and achieve the effects of high mechanical strength, reduced membrane resistance, and uniform thickness

Inactive Publication Date: 2010-07-14
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, when the ion exchange capacity of the perfluorinated ion exchange membrane increases, the membrane resistance will decrease, but the mechanical strength will decrease

Method used

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  • Fluorine-containing ion exchange membrane with reinforced sacrificial fiber mesh cloth
  • Fluorine-containing ion exchange membrane with reinforced sacrificial fiber mesh cloth
  • Fluorine-containing ion exchange membrane with reinforced sacrificial fiber mesh cloth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The polytetrafluoroethylene (PTFE) film is stretched rapidly, and then the stretched film is cut into monofilaments with a fineness of 90 denier; eight polyethylene terephthalate (PET) fibers with a diameter of 10 μm are used The whole is laid flat into a set of yarns. A plain weave fabric was alternately woven in the order of one PTFE thread and two groups of PET yarns, with a weaving density of 15 threads / cm.

[0056] Fluorine-containing resin single film and composite film are prepared by melt-extrusion film forming process and hot pressing process.

[0057] First prepare the film A with thickness of 8 microns with the above-mentioned perfluorocarboxylic acid resin A; prepare the film B with the thickness of 80 microns with the above-mentioned perfluorosulfonic acid resin B; The mass ratio of 1:1 was mixed evenly to prepare a film C with a thickness of 6 microns. Then, various films are stacked in the order of A\C\B for heat press lamination to obtain a multilayer ...

Embodiment 2

[0061] The reinforced mesh was prepared in the same manner as in Example 1, except that 10 polyethylene terephthalate (PET) fibers with a diameter of 10 μm were used to weave as a group of yarns.

[0062] The fluorine-containing ion exchange membrane reinforced by sacrificial fiber mesh was obtained by using the same multilayer membrane and lamination, transformation and coating process as in Example 1. And use the same method of Example 1 to measure its tensile strength, volume expansion rate and electrolytic performance.

Embodiment 3

[0064] The reinforced mesh was prepared in the same manner as in Example 1, except that 9 polyethylene terephthalate (PET) fibers with a diameter of 10 μm were used to weave as a group of yarns.

[0065] The fluorine-containing ion exchange membrane reinforced by sacrificial fiber mesh was obtained by using the same multilayer membrane and lamination, transformation and coating process as in Example 1. And use the same method of Example 1 to measure its tensile strength, volume expansion rate and electrolytic performance.

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Abstract

The invention relates to a fluorine-containing ion exchange membrane with reinforced sacrificial fiber mesh cloth, which comprises a fluorine-containing ion exchange resin base membrane, mesh cloth with sacrificial fiber and a hydrophilic coating, wherein the fluorine-containing ion exchange resin base membrane comprises a perfluorocarboxylic acid resin membrane layer of 5-10 micrometers, a perfluorosulfonic acid resin membrane layer of 90-120 micrometers, and a perfluorosulfonic acid / perfluorocarboxylic acid copolymerization or blending resin membrane layer of 0-40 micrometers, which is positioned between the perfluorocarboxylic acid membrane layer and the perfluorosulfonic acid membrane layer; and the mesh cloth with the sacrificial fiber comprises reinforced fiber and sacrificial fiber. In the invention, the fluorine-containing ion exchange membrane with the reinforced sacrificial fiber mesh cloth can improve the electrochemical properties of the membrane and can effectively reduce the resistance of the membrane.

Description

technical field [0001] The invention belongs to the field of fluorine-containing functional polymer composite materials, in particular to a fluorine-containing ion-exchange multilayer membrane reinforced with sacrificial fiber mesh cloth and a preparation method thereof. Background technique [0002] Perfluorinated ion exchange membrane materials have a very wide range of uses, and can be used as isolation membranes for various electrolytic preparation devices including chlor-alkali industrial machines. In addition, they can be used in electrodialysis, chemical catalysis, gas separation, gas drying, sewage treatment, seawater desalination, etc. It also shows excellent performance. [0003] The ion exchange membrane is the core of the ion-exchange membrane chlor-alkali electrolyzer. During the electrolysis process, the electrolysis conditions of the membrane material are harsh. One side of the membrane is high-temperature and high-concentration acidic brine and chlorine gas, ...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/32B01D71/40C08J5/22
Inventor 张永明刘萍王婧
Owner SHANDONG DONGYUE POLYMER MATERIAL
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