Diaphragm cloth for water electrolyser and method for producing diaphragm cloth

A technology of water electrolysis cell and production method, applied in the direction of diaphragm, electrolysis process, electrolysis components, etc., can solve the problems of long cleaning time, poor safety, environmental pollution, etc., and achieve fast production method, high air tightness and hydrophilicity Good results

Inactive Publication Date: 2014-07-23
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively strong liquid absorption rate of the nonwoven fabric, the invention needs to consume a lot of precious water resources and chemicals in the cleaning process after strong acid treatment, and the cleaning time is also long, and the process operation is complicated, which is easy to pollute the environment.
At the same time, the safety is also poor, and it is not suitable for industrial production
[0005] Another example is the Chinese published patent CN101195944 which discloses a woven fabric made of one, two or three of polyetheretherketone fiber, polyphenylene sulfide fiber and polypropylene fiber as a non-asbestos environment-friendly and energy-saving fabric. Diaphragm cloth, although the airtightness of the diaphragm cloth meets the standard requirements for asbestos diaphragms, but due to the poor water absorption of the above chemical fibers, the resulting diaphragm cloth has poor hydrophilicity and cannot really meet the use requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Diaphragm cloth for water electrolyser and method for producing diaphragm cloth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Both the warp and weft yarns are woven with 20s / 6 polyphenylene sulfide yarns to obtain a plain weave fabric with a warp yarn density of 39 yarns / inch and a weft yarn density of 27 yarns / inch. The surface of the sulfide plain weave fabric is treated with vacuum plasma, and the treatment conditions are: under the simultaneous action of oxygen and argon, the treatment intensity is 150KW·s / m 2 Finally, the coverage factor is 2777.89, the average pore diameter is 3 μm, and the pores with a pore diameter in the range of 0.2-10 μm account for 90% of all pores, and the strength in the warp and latitude directions is 4008 N / 5cm and 3218 N / 5cm respectively. Diaphragm cloth, the prepared diaphragm cloth is tested by X-ray photoelectron spectrum analyzer, and the surface of polyphenylene sulfide fiber in the diaphragm cloth contains hydrophilic groups, and the content of oxygen element contained in the surface of polyphenylene sulfide fiber is measured The hydrophilic group includ...

Embodiment 2

[0056] Both the warp and weft yarns are woven with 20s / 4 polyphenylene sulfide yarns to obtain a plain weave fabric with a warp yarn density of 47 yarns / inch and a weft yarn density of 32 yarns / inch. The surface of the sulfide plain weave fabric is subjected to vacuum plasma treatment, the treatment conditions: under the action of air, the treatment intensity is 150KW·s / m 2 Finally, the coverage factor is 2705.82, the average pore diameter is 4 μm, and the pores with a pore diameter in the range of 0.2-10 μm account for 85% of all pores, and the latitude and longitude strength are 2247 N / 5cm and 2110 N / 5cm respectively Diaphragm cloth, the prepared diaphragm cloth is tested by X-ray photoelectron spectrum analyzer, and the surface of polyphenylene sulfide fiber in the diaphragm cloth contains hydrophilic groups, and the content of oxygen element contained in the surface of polyphenylene sulfide fiber is measured 30% by weight, the hydrophilic groups include carbonyl (C=O) and ...

Embodiment 3

[0058] Mix cross-section polyphenylene sulfide fibers with circular cross-section polyphenylene sulfide fibers at a weight ratio of 20:80, and obtain 15s / 4 polyphenylene sulfide yarns through a spinning process, and then the above-mentioned The obtained polyphenylene sulfide yarn is woven as a warp and a weft, and is woven into a plain weave fabric with a warp density of 39 threads / inch and a weft density of 28 threads / inch, refining and drying after weaving, and then polyphenylene sulfide plain weave The surface of the fabric is treated with atmospheric pressure plasma, and the treatment conditions are: under the action of air, the treatment intensity is 50KW·s / m 2 Finally, the diaphragm cloth for water electrolyzer with a coverage factor of 2658.70, an average pore diameter of 5 μm, and pores with a pore diameter in the range of 0.2 to 10 μm accounted for 80% of the total pores, and a latitude and longitude strength of 2600 N / 5cm and 2216 N / 5cm respectively were obtained. , ...

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Abstract

The invention discloses a piece of diaphragm cloth for a water electrolyser and a method for producing the diaphragm cloth. The diaphragm cloth is a woven fabric or a non-woven fabric or a knitted fabric made of polyphenylene sulfide fiber, the average aperture of the diaphragm cloth is smaller than 10 micrometers, and the venting quality of the diaphragm cloth is 2 L/cm<2>/min or lower under the pressure of 3 KPa. The diaphragm cloth has the advantages of being high in gas tightness, hydrophilcity and ion permeability, and has the advantages of being low in cost, safe, environmentally friendly, light in weight, rapid and efficient in production, free of pollution, easy to operate and capable of saving energy at the same time.

Description

technical field [0001] The invention relates to a diaphragm cloth for a water electrolyzer and a production method thereof. Background technique [0002] Diaphragm cloth is the main core material of the water electrolyzer. It is placed between the anode and cathode of the water electrolyzer to prevent the mixing of the gas on the anode side and the gas on the cathode side to ensure the purity of the gas. Its performance requirements are: fully wetted by electrolyte; small average pore size, high air tightness; large porosity; certain mechanical strength and rigidity; not corroded by alkaline electrolyte, high temperature resistance, strong chemical stability ; Easy to implement industrialization. [0003] At present, the main manufacturers of alkaline water electrolysis hydrogen production equipment in China still use asbestos cloth as the diaphragm. However, with the advancement of industrialization and technological progress, people have gradually realized that there are...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D03D15/00D04B21/00D04H3/005D06M10/02D06M14/26D06M14/00C25B1/10C25B13/04D03D15/283D03D15/50D03D15/513H01M50/403H01M50/411H01M50/44H01M50/489H01M50/491H01M50/497
CPCC25B13/08Y02E60/36C25B1/04C25B9/73D06M10/00D06M2101/30D06M2101/22
Inventor 杨丽丽武田正明张尤娟
Owner TORAY FIBER RES INST(CHINA) CO LTD
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