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Novel low-resistance chlor-alkali industrial ion-conducting membrane and preparation method thereof

An ion-conducting membrane, a technology for the chlor-alkali industry, applied in the field of new low-resistance chlor-alkali industrial ion-conducting membranes and its preparation, can solve problems such as increased membrane resistance and increased tank pressure, and achieve reduced adhesion, lowered tank voltage, and improved process Simple and reasonable effect

Active Publication Date: 2021-07-09
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dense inorganic oxides without ion conductivity and fluorine-containing particles will increase the membrane resistance, thereby increasing the cell pressure

Method used

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  • Novel low-resistance chlor-alkali industrial ion-conducting membrane and preparation method thereof
  • Novel low-resistance chlor-alkali industrial ion-conducting membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The novel low-resistance chlor-alkali industrial ion-conducting membrane shown in Example 1 consists of the first perfluorocarboxylic acid-perfluorosulfonic acid polymer composite layer, perfluorocarboxylic acid polymer layer, perfluoropolymer reinforced network and functional The surface coating is composed of a surface coating; wherein, the functional surface coating is a porous rough structure composed of a perfluorinated ion polymer, and the perfluoropolymer reinforced mesh is composed of polytetrafluoroethylene and silk.

[0044] The preparation method of the novel low-resistance chlor-alkali industrial ion-conducting membrane described in this embodiment 1 is prepared by the following steps:

[0045] (1) Adopt the perfluorosulfonic acid resin of IEC=1.0mmol / g and the perfluorocarboxylic acid resin of IEC=0.8mmol / g to obtain material A through melt granulation according to mass ratio 10:1, then adopt material A and IEC= 0.8mmol / g perfluorocarboxylic acid resin is m...

Embodiment 2

[0059] The novel low-resistance chlor-alkali industrial ion-conducting membrane shown in Example 2, perfluorosulfonic acid polymer layer, the second perfluorocarboxylic acid-perfluorosulfonic acid polymer composite layer, perfluoropolymer reinforced net and functional surface Coating composition; Among them, the functional surface coating is a porous rough structure composed of perfluoroionic polymers, and the perfluoropolymer reinforced mesh is composed of polytetrafluoroethylene and silk.

[0060] The preparation method of the novel low-resistance chlor-alkali industrial ion-conducting membrane described in this embodiment 2 is prepared by the following steps:

[0061] (1) Use IEC=1.0mmol / g perfluorosulfonic acid resin and IEC=0.8mmol / g perfluorocarboxylic acid resin to obtain material A through melt granulation at a mass ratio of 1:100, and then use material A and IEC= 1.0mmol / g perfluorosulfonic acid resin is mixed and co-extruded to form a perfluoroion exchange resin base...

Embodiment 3

[0076] The new low-resistance chlor-alkali industrial ion-conducting membrane described in this embodiment 3 consists of the first perfluorocarboxylic acid-perfluorosulfonic acid polymer composite layer, the second perfluorocarboxylic acid-perfluorosulfonic acid polymer composite layer, It is composed of perfluoropolymer reinforced net and functional surface coating; among them, the functional surface coating is a porous rough structure composed of perfluoropolymer, and the perfluoropolymer reinforced net is composed of non-woven polymer and protein fiber. into.

[0077] The preparation method of the novel low-resistance chlor-alkali industrial ion-conducting membrane described in this embodiment 3 is prepared by the following steps:

[0078](1) Use IEC=1.0mmol / g perfluorosulfonic acid resin and IEC=0.8mmol / g perfluorocarboxylic acid resin to obtain material A through melt granulation at a mass ratio of 10:1, using IEC=1.0mmol / g The perfluorosulfonic acid resin and the perflu...

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Abstract

The invention belongs to the technical field of ion exchange membranes, and in particular relates to a novel low-resistance chlor-alkali industrial ion conduction membrane and a preparation method thereof. It consists of the first perfluorocarboxylic acid-perfluorosulfonic acid polymer composite layer, the second perfluorocarboxylic acid-perfluorosulfonic acid polymer composite layer, perfluoropolymer reinforced mesh and functional surface coating; wherein, the functional surface The coating is a porous and rough structure composed of perfluorinated ionic polymers, and the perfluoropolymer reinforced mesh is composed of non-woven polymers and protein fibers. In the new low-resistance chlor-alkali industrial ion-conducting membrane described in the present invention, a small amount of perfluorocarboxylic acid is added to the perfluorosulfonic acid layer to improve the current efficiency of the membrane, and a small amount of perfluorosulfonic acid is added to the perfluorocarboxylic acid layer. The acid reduces the membrane resistance; the perfluoropolymer reinforced mesh is used as the reinforcing material to reduce the membrane resistance; the use of inorganic oxides or fluorine-containing particles in the traditional coating is reduced, and the surface resistance of the composite membrane is reduced, which is conducive to the rapid transmission of ions.

Description

technical field [0001] The invention belongs to the technical field of ion exchange membranes, and in particular relates to a novel low-resistance chlor-alkali industrial ion conduction membrane and a preparation method thereof. Background technique [0002] The chlor-alkali industry is the basic industry of the national economy. Its products are widely used in various fields of the national economy such as agriculture, petrochemical industry, light industry, textile, chemical building materials, electric power, national defense and military industry, etc. It plays a pivotal role in my country's economic development. However, the chlor-alkali industry is a high-energy-consuming industry in my country's petroleum and chemical industries, which is mainly reflected in the power consumption of caustic soda production. In 2013, the national caustic soda consumed about 66.5 billion Kw h of alternating current, accounting for about 1.27% of the country's total power generation. It...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B13/08C25B13/02C25B1/46B05D7/04B05D7/24B29C48/21B29L7/00
CPCB05D7/04B05D7/24B29L2007/00B29C48/21C25B1/46C25B13/02C25B13/08
Inventor 张永明雷建龙刘烽张恒张振赵宽王丽
Owner SHANDONG DONGYUE POLYMER MATERIAL
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