Micro-porous membrane compounded multi-layer fluorine-containing cross-linking doped ionic membrane

A technology of doping ions and microporous membranes, which is applied in the field of functional polymer composite materials and can solve problems such as poor air tightness and poor mechanical properties

Active Publication Date: 2010-06-16
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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  • Micro-porous membrane compounded multi-layer fluorine-containing cross-linking doped ionic membrane
  • Micro-porous membrane compounded multi-layer fluorine-containing cross-linking doped ionic membrane
  • Micro-porous membrane compounded multi-layer fluorine-containing cross-linking doped ionic membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Convert the repeating unit to

[0100]

[0101] , 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) be dispersed in propanol-water, make total mass concentration be 5% propanol-water solution, then add mass concentration and be the perfluoromalonyl peroxide DMF solution of 5%, will surface with H 3 PO 4 -SiO 2 The modified 30 μm thick expanded polytetrafluoroethylene film (porosity 70%) is placed in the above solution and soaked for about 1 hour, then the soaked film is dried on a heating plate, and the film is dried with a rubber roller. rolling. The above solution was cast into a polytetrafluoroethylene casting mold placed horizontally, and after vacuum drying at 80°C for 12 hours, the membrane was peeled off to obtain a doped ion membrane (single Layer film 1#). The above two single-layer ionic membranes 1# are stacked and hot-pressed ...

Embodiment 2

[0103] Convert the repeating unit to

[0104]

[0105] , polymer resin with EW=800 and SiO with a particle size of 0.03 μm 2 (SiO 2 The mass ratio with perfluorosulfonic acid resin is 5: 100), and extruded to obtain a film with a thickness of 30 μm, which is then passed through the phosphorylated-silicon dioxide modified porous hexafluoropropylene membrane at 260 ℃ under vacuum state, heat press together, then heat in a vacuum oven at 150 ℃ for 1 hour, and then soak 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).

[0106] Convert the repeating unit to

[0107]

[0108] , EW=1200 polymer resin and tetraphenyl tin are extruded into a film with a thickness of 20 μm by a twin-screw extruder, ...

Embodiment 3

[0110] Convert the repeating unit to

[0111]

[0112] , EW=1100 polymer resin, lanthanum acetate (lanthanum acetate accounts for 0.001% of resin mass) and Ce (HPO 4 ) 2 (resin and Ce(HPO 4 ) 2 The mass ratio is 100:1) to prepare a polymer resin solution with a total mass concentration of 3%, and sulfuric acid-ZrO 2 Modified 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 cross-linked bridge structure with a thickness of 10 μm as (I) ionic film (single-layer film 4#).

[0113] Convert the repeating unit to

[0114]

[0115] , polymer resin of EW=940, Ru-DMSO complex (accounting for 0.1% of resin quality) and H 3 PW 12 o 40 (polymer resin and H 3 PW 12 o 40 The mass ratio is 100:20) to prepare a DMSO solution with a total mass concentration of 30%, and process it at 170° C. for 60 minutes by casting method to obtain a film with...

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Abstract

The invention relates to a micro-porous membrane compounded multi-layer fluorine-containing cross-linking doped ionic membrane and a preparation method thereof. The membrane contains 2 to 40 layers, preferably 2 to 5 layers, formed by fluorine-containing ion exchange resin which has an EW value of 600 to 1300. The total thickness of the membrane is 10 to 300 microns. At least one layer of the membrane has cross-linked network structure; at least one layer of the membrane is filled with auxiliary proton transmitter substance; at least one layer of the membrane adopts micro-porous membrane as reinforcement; and at least one layer of the membrane is provided with high valence metallic compound. The micro-porous membrane compounded multi-layer fluorine-containing cross-linking doped ionic membrane of the invention has high mechanical intensity, increases the stability of the membrane on length, width and thickness directions, has high ion exchange capability and high conductivity, and can be applied to producing fuel cell.

Description

technical field [0001] The invention belongs to the field of functional polymer composite materials, and relates to a microporous membrane composite, multi-layer fluorine-containing cross-linked doped 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 absorpti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/32C08L27/18C08K3/32C08K3/26C08K3/36C08K5/098C08K3/22C08K3/30C08K3/28C08K3/34C08J5/22H01M8/02H01M2/16H01M8/1041H01M8/1048H01M8/1053H01M50/414H01M50/457
CPCY02E60/50Y02E60/12
Inventor 张永明唐军柯张恒王军
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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