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Enhanced multi-layer fluorine-containing ion exchange membrane

An ion-exchange membrane and ion-exchange resin technology, applied in collectors/separators, electrical components, circuits, etc., can solve the problems of decreased perfluoropolymer equivalent value, low mechanical strength, poor chemical stability, etc.

Active Publication Date: 2010-06-09
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

However, they also have many defects: such as poor dimensional stability, low mechanical strength, poor chemical stability, etc.
Generally speaking, when the ion exchange capacity increases, the equivalent value of perfluoropolymer decreases (equivalent value EW value decreases, ion exchange capacity IEC=1000 / EW) and the strength of the membrane also decreases

Method used

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  • Enhanced multi-layer fluorine-containing ion exchange membrane
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  • Enhanced multi-layer fluorine-containing ion exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Placing PTFE fibers in SiCl 4 After being in the atmosphere for 1 hour, the temperature was raised to 110° C. and maintained for 1 hour. After cooling to 60° C., water was sprayed to obtain silica-modified polytetrafluoroethylene fibers.

Embodiment 2

[0070] Put alkali-free glass fiber in Ti(OEt) 4 In the water mixing system, add concentrated ammonia water under stirring, hydrolyze and stand still to obtain alkali-free glass fiber modified with titanium dioxide.

Embodiment 3

[0072] Triethyl phosphate and ethyl orthosilicate (1:100 mass ratio) were mixed, water and concentrated ammonia water were added to let the gel stand for 12 hours, and then the gel was used to obtain phosphoric acid-modified bismuth by electrospinning or spinning technology. Silica fibers.

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Abstract

The invention relates to a fiber-enhanced multi-layer fluorine-containing ion exchange membrane which is stable to free radicals, belonging to the field of functional polymer composite materials. The membrane is a multi-layer structure membrane which consists of fluorine-containing ion exchange resin, enhancing fibers and free radical removing substances. The prepared ion exchange membrane has high proton conductivity, high mechanical performance, strong resistance to the free radicals, and mechanical stability and can effectively prevent the penetration of hydrogen and methanol.

Description

technical field [0001] The invention belongs to the field of functional polymer composite materials, and relates to a fiber-reinforced multi-layer anti-free radical fluorine-containing ion exchange membrane and a preparation method thereof. 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 (such as 80°C) and higher humidity. However, they also have many defects: such as poor dimensional stability, low mechanical strength, and poor chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/16C08L27/18C08L27/12C08K9/02C08K7/14C08K3/28C08K3/26C08K3/30C08K3/32C08K3/22H01M8/0202
CPCY02E60/50Y02E60/12
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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