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Novel ultrathin low-resistance chlorine-alkali industrial ion conduction membrane and preparation method thereof

An ion-conducting membrane, a technology for the chlor-alkali industry, applied in the field of new ultra-thin low-resistance chlor-alkali industrial ion-conducting membrane and its preparation, can solve the problems of increased membrane resistance and increased tank pressure, and achieve reduced adhesion and decreased tank voltage , the effect of reducing thickness

Inactive Publication Date: 2020-05-22
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 ultrathin low-resistance chlorine-alkali industrial ion conduction membrane and preparation method thereof
  • Novel ultrathin low-resistance chlorine-alkali industrial ion conduction membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The novel ultra-thin low-resistance chlor-alkali industrial ion-conducting membrane described in Example 1 is composed of the first perfluorocarboxylic acid-perfluorosulfonic acid polymer composite layer, perfluorocarboxylic acid polymer layer, and porous non-woven polymer layer and a functional surface coating; wherein, the functional surface coating is a porous rough structure composed of a perfluorinated ion polymer.

[0041] The preparation method of the novel ultra-thin low-resistance chlor-alkali industrial ion-conducting membrane described in this embodiment 1 is prepared by the following steps:

[0042](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 10:3, dissolve material A in polar Perfluorosulfonic acid-perfluorocarboxylic acid resin solution is prepared in a solvent (a solvent made of ethanol and isopropanol at a weight ra...

Embodiment 2

[0055] The new ultra-thin low-resistance chlor-alkali industrial ion-conducting membrane described in this embodiment 2 consists of a perfluorosulfonic acid polymer layer, a second perfluorocarboxylic acid-perfluorosulfonic acid polymer composite layer, and a porous non-woven polymer layer and a functional surface coating; wherein, the functional surface coating is a porous rough structure composed of a perfluorinated ion polymer.

[0056] The preparation method of the novel ultra-thin low-resistance chlor-alkali industrial ion-conducting membrane described in this embodiment 2 is prepared by the following steps:

[0057] (1) the perfluorosulfonic acid resin of IEC=1.0mmol / g is dissolved in the polar solvent (the solvent that ethanol and Virahol are made into by the weight ratio of 1:1) to prepare perfluorosulfonic acid resin solution; The polytetrafluoroethylene porous non-woven membrane is soaked in the trifluorotrichloroethane solvent of ultrasonic treatment and processed f...

Embodiment 3

[0071] The new ultra-thin low-resistance chlor-alkali industrial ion-conducting membrane described in this embodiment 3 is composed of the first perfluorocarboxylic acid-perfluorosulfonic acid polymer composite layer and the second perfluorocarboxylic acid-perfluorosulfonic acid polymer composite layer. layer, a porous non-woven polymer layer and a functional surface coating; wherein the functional surface coating is a porous rough structure composed of a perfluoroionic polymer.

[0072] The preparation method of the novel ultra-thin low-resistance chlor-alkali industrial ion-conducting membrane described in this embodiment 3 is prepared by the following steps:

[0073] (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, dissolve material A in polar Perfluorosulfonic acid-perfluorocarboxylic acid resin solution is prepared in a solvent (a ...

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Abstract

The invention belongs to the technical field of ion exchange membranes, and particularly relates to a novel ultrathin low-resistance chlorine-alkali industrial ion conduction membrane and a preparation method thereof. The membrane is composed of a first perfluorocarboxylic acid-perfluorosulfonic acid polymer composite layer, a second perfluorocarboxylic acid-perfluorosulfonic acid polymer composite layer, a porous non-woven polymer layer and a functional surface coating, wherein the functional surface coating is of a porous rough structure formed by a perfluorinated ionic polymer. According tothe novel ultrathin low-resistance chlorine-alkali industrial ion conduction membrane, a small amount of perfluorocarboxylic acid is added into a perfluorosulfonic acid layer, so that the current efficiency of the membrane is improved; the membrane resistance is reduced by adding a small amount of perfluorosulfonic acid into the perfluorocarboxylic acid layer; an ultrathin porous non-woven polymer layer is used as a reinforcing material, so that the thickness of the membrane is greatly reduced, and the membrane resistance is reduced; and the use amount of inorganic oxide or fluorine-containing particles in a traditional coating is reduced, the resistance of the composite film body is reduced, and rapid ion transmission is facilitated.

Description

technical field [0001] The invention belongs to the technical field of ion exchange membranes, and in particular relates to a novel ultra-thin 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. 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 generati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/46C25B13/08C25B13/02D06N3/00D06N3/18
CPCC25B1/46C25B13/02C25B13/08D06N3/0077D06N3/0088D06N3/186
Inventor 张永明雷建龙张恒张江山陈静薛帅戴琼
Owner SHANDONG DONGYUE POLYMER MATERIAL
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