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Multi-layer perfluorinated cross-linking adulterated ionic membrane compounding micro-porous membrane and fiber

A technology of fiber compounding and ion doping, which is applied in the direction of semi-permeable membrane separation, membrane technology, collector/separator, etc., and can solve problems such as poor mechanical properties and poor air tightness

Active Publication Date: 2010-06-23
SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the shortcomings of traditional membranes such as poor air tightness and poor mechanical properties

Method used

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  • Multi-layer perfluorinated cross-linking adulterated ionic membrane compounding micro-porous membrane and fiber
  • Multi-layer perfluorinated cross-linking adulterated ionic membrane compounding micro-porous membrane and fiber
  • Multi-layer perfluorinated cross-linking adulterated ionic membrane compounding micro-porous membrane and fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] Convert the repeating unit to

[0108]

[0109] , EW=1000 polymer resin, vanadium carbonate (accounting for 0.01% of resin mass), particle size is 0.005 μ m Zr (HPO 4 ) 2 (Zr(HPO 4 ) 2 The mass ratio with resin is 3: 100) is dispersed in propanol-water, makes mass concentration and is the propanol-water solution of 5%, then adds the perfluoromalonyl peroxide DMF solution that mass concentration is 5%, the 30 μ m A thick expanded polytetrafluoroethylene film (with a porosity of 70%) was soaked in the above solution for about 1 hour, and then the soaked film was dried on a heating plate, during which the film was rolled with a rubber roller. To the same solution above was added surface H 3 PO 4 -SiO 2 Modified polytetrafluoroethylene fibers (1 μm in diameter, 50 μm in length, 7:100 mass ratio to polymer resin) were then cast into a horizontally placed polytetrafluoroethylene mold and vacuum-dried at 80°C for 12 hours. The membrane was peeled off to obtain the do...

Embodiment 2

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[0112]

[0113] , EW = 800 polymer resin, SiO with a particle size of 0.03 μm 2 (SiO 2 The mass ratio of alkali-free glass fiber to resin is 5:100), surface phosphorylated non-alkali glass fiber (diameter is 0.05 μm, length is 5 μm, mass ratio of non-alkali glass fiber and resin is 1:40), and then extruded to obtain A membrane with a thickness of 30 μm was hot-pressed together with a silica-modified porous hexafluoropropylene membrane with a thickness of 12 μm under vacuum at 260°C, then heated in a vacuum oven at 150°C for 1 hour, and then soaked in NH 4 Cl in DMF for 5 hours. The soaked membrane was then placed in triethylamine at 200°C for 2 hours to obtain a crosslinked membrane. The membrane was sequentially treated with KOH solution and hydrochloric acid solution to obtain an ion exchange membrane (single-layer membrane 2#) with a cross-linked bridge structure (II).

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[0115]

[0116]...

Embodiment 3

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[0119]

[0120] , EW=1100 polymer resin, lanthanum acetate (lanthanum acetate accounts for 0.001% of resin mass) and Ce (HPO 4 ) 2 Press (resin and Ce(HPO 4 ) 2 The mass ratio is 100:1) to make a polymer resin solution with a total mass concentration of 3%, and the porous Al 2 o 3 The film was immersed in the above solution, and after 30 minutes, the film was taken out and dried, and then the film was cross-linked by 50KGy radiation to obtain a 10 μm cross-linked bridge structure (I) ion membrane (single-layer film 4#).

[0121] Convert the repeating unit to

[0122]

[0123] , EW=940 polymer resin, Ru(III)-DMSO complex (accounting for 0.1% of resin mass) and H 3 PW 12 o 40 (Polymer and H 3 PW 12 o 40 Mass ratio is 100: 20) make the DMSO solution that total mass concentration is 30%, add sulfuric acid-ZrO2 modified polytetrafluoroethylene fiber (diameter is 0.2 μ m, and length is 80 μ m, and the mass-to-mass ratio with po...

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PUM

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Abstract

The invention belongs to the field of functional polymer composite material, which relates to a multi-layer perfluorinated cross-linking adulterated ionic membrane compounding micro-porous membrane and fiber. The ionic membrane is a multi-layer membrane with 2-40 layers formed by perfluorinated ion exchange resin with the EW value of 600-1300, wherein at least one layer has a cross-linking reticular structure, at least one layer is a reinforcing membrane with the micro-porous membrane being a reinforce, at least one layer is added in an anorganic adulterant with functions of water holding and proton exchange, at least one layer is added in the fiber as the reinforce, and at least one layer is added in high valence metallic compound and at least one layer is added in the fiber as the reinforce; and the multi-layer perfluorinated cross-linking adulterated ionic membrane adopts the methods comprising the cross linking of the micro-porous membrane, the reinforcing fiber and the chemical bonding, the physical exchange cross-linking of high valence metallic compound and acid exchange base group and the like, simultaneously the mechanical strength of the ionic membrane is greatly increased, and due to the existence of the transmitter substance of adjuvant proton, the electric conductivity of the obtained membrane under high temperature or low humidity is far higher than the electric conductivity of common ion exchange membrane.

Description

technical field [0001] The invention belongs to the field of functional polymer composite materials, and relates to a multi-layer perfluorinated cross-linked doped ion membrane composed of microporous membranes and fibers. Background technique [0002] Proton exchange membrane fuel cell is a power generation device that directly converts chemical energy into electrical energy by electrochemical means, and is considered to be the preferred clean and efficient power generation technology in the 21st century. Proton exchange membrane (proton exchange membrane, PEM) is the key material of proton exchange membrane fuel cell (proton exchange membrane fuel cell, PEMFC). [0003] The currently used perfluorosulfonic acid proton exchange membrane has good proton conductivity and chemical stability at lower temperature (80°C) and higher humidity. However, they also have many defects: such as poor dimensional stability, low mechanical strength, and poor chemical stability. The water ...

Claims

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Application Information

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IPC IPC(8): B01D71/32H01M8/02H01M2/16C08L27/18C08L27/20C08L79/08H01M8/0202H01M8/1018
CPCY02E60/12Y02E60/50
Inventor 张永明唐军柯刘萍申玉鹏张恒王军
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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