Fiber reinforced composite multi-layer total fluoride crosslinking ionic membrane and preparation method thereof

A fiber composite, ionic membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of alkali instability, increased gas permeability, poor chemical stability, etc.

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

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Problems solved by technology

However, they also have many defects: such as poor dimensional stability, low mechanical strength, poor chemical stability, etc.
[0012] US20070031715 describes the cross-linking method of sulfonyl chloride cross-linking to generate sulfonyl anhydride. The sulfonyl anhydride cross-linking structure formed in this method can effectively improve the mechanical strength of the membrane, but the cross-linking structure has obvious di

Method used

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  • Fiber reinforced composite multi-layer total fluoride crosslinking ionic membrane and preparation method thereof
  • Fiber reinforced composite multi-layer total fluoride crosslinking ionic membrane and preparation method thereof
  • Fiber reinforced composite multi-layer total fluoride crosslinking ionic membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0090] Example 1:

[0091] The repeating unit is

[0092]

[0093] , EW=1000 polymer resin and cerium carbonate (0.01% of the resin mass) are dispersed into propanol-water to prepare a propanol-water solution with a total mass concentration of 5%, and then add peroxide with a mass concentration of 5% Perfluoromalonyl DMF solution, add surface H to the above solution 3 PO 4 -SiO 2 Modified polytetrafluoroethylene fiber (1μm in diameter, 50μm in length, 7:100 mass ratio of polymer resin), and then cast into a horizontally placed polytetrafluoroethylene mold. After drying in a vacuum at 80°C for 12 hours, The membrane was peeled off to obtain a single-layer fluorine-containing sulfonic acid ion membrane (single-layer membrane 1#) with a crosslinking bridge of (I). The two single-layer perfluorinated cross-linked ion membranes are stacked and hot pressed to prepare a cerium ion-bonded double-layer fiber-reinforced perfluorinated cross-linked ion membrane (multilayer membrane 1#).

Example Embodiment

[0094] Example 2:

[0095] The repeating unit is

[0096]

[0097] , EW=800 polymer resin and surface phosphorylated alkali-free glass fiber (a diameter of 0.05μm, length of 5μm, mass ratio of perfluorosulfonic acid resin 1:40) are mixed, and then extruded to obtain a thickness of 30μm The film is heated in a vacuum oven at 150℃ for 1 hour, and then soaked in NH 4 In the DMF solution of Cl for 5 hours, then the soaked membrane was placed in triethylamine at 200°C for 2 hours to obtain a cross-linked membrane. The membrane was treated with KOH solution and hydrochloric acid solution in sequence, and the cross-linked bridge structure was (II) ion exchange membrane (single-layer membrane 2#).

[0098] The repeating unit is

[0099]

[0100] , The polymer resin with EW=1200 and tetraphenyltin are extruded into a film with a thickness of 20μm using a twin-screw extruder, and then the film is heated to 230°C for 10 hours to obtain a film with a crosslinked bridge structure (V). The membra...

Example Embodiment

[0101] Example 3:

[0102] The repeating unit is

[0103]

[0104] , EW=1100 polymer resin, lanthanum acetate (lanthanum acetate accounts for 0.001% of the resin mass) are mixed, dissolved in a solvent to prepare a polymer resin solution with a total mass concentration of 3%, then cast into a film, and then This film was cross-linked by 50KGy radiation to obtain an ionic film (single-layer film 4#) with a cross-linked bridge structure of (I) with a thickness of 10 μm.

[0105] The repeating unit is

[0106]

[0107] , EW=940 polymer resin, Ce(III)-DMSO complex (0.1% of the resin mass) is made into a DMSO solution with a total mass concentration of 30%, and sulfuric acid-ZrO is added 2 Modified polytetrafluoroethylene fiber (0.2μm in diameter, 80μm in length, 7:100 in weight ratio to polymer resin), and then treated by casting at 170°C for 60 minutes to obtain a thickness of 10μm Film (single-layer film 5#).

[0108] The single-layer membranes 4#, 4#, and 5# fluorine-containing sulfoni...

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Abstract

The invention relates to a fiber composite multi-layer total fluoride crosslinking ionic membrane and a preparation method thereof, which belongs to the field of functional polymer composite materials. The fluorine-containing ion exchange membrane is in a double-net structure with chemical bonding crosslinking and physical bonding crosslinking of a high valent metallic compound and an acidic exchange group and simultaneously contains reinforced fiber. The prepared ion exchange membrane has higher dimensional stability and good mechanical strength.

Description

technical field [0001] The invention belongs to the field of functional polymer composite materials, and relates to a fiber-reinforced multi-layer perfluorinated cross-linked ion membrane. 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 absorption rate of the membrane an...

Claims

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Application Information

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IPC IPC(8): B01D71/32H01M8/02H01M2/16C08L27/18C08K7/14C08L27/12C08L27/20C08K7/04C08K3/28C08K3/30C08K3/32C08K5/098C08L5/16C08J5/22H01M8/1041H01M8/1069H01M50/411H01M50/414H01M50/44H01M50/457H01M50/491H01M50/497
CPCY02E60/12Y02E60/50
Inventor 张永明唐军柯刘萍张恒王军
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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