Process for preparing composite proton exchange film by alkali metal ion type perfluoro sulfonate resin

A technology of perfluorosulfonic acid resin and alkali metal ions, applied in chemical instruments and methods, membrane technology, organic diaphragms, etc., to achieve good application effect and good air tightness

Inactive Publication Date: 2006-01-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the glass transition temperature of porous PTFE is 345°C, if the heat treatment temp

Method used

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  • Process for preparing composite proton exchange film by alkali metal ion type perfluoro sulfonate resin
  • Process for preparing composite proton exchange film by alkali metal ion type perfluoro sulfonate resin

Examples

Experimental program
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Embodiment 1

[0023] Get 50mL deionized water, 100mL ethanol, 5gNaCl, stir to make it mix evenly, obtained the alcohol-water mixed solution of NaCl; Get the Nafion perfluorosulfonic acid resin (EW value 1100) that 10gDupont company produces, 200mL propanol, in autoclave Dissolve in 22Mpa and 230°C to obtain a perfluorosulfonic acid resin solution, then add 5g of octylphenol polyethoxyethanol as an active agent; titrate the NaCl alcohol-water mixed solution into the prepared resin alcohol solution to the pH value of the resin solution It is 7.5, obtains Na type resin alcohol solution; The clean porous polytetrafluoroethylene (PTFE) that thickness is 15um is placed in this solution and soaks for 5 minutes, then takes out and adopts double-wheel wheel to roll and roll once, and the film after rolling is placed Put it into a vacuum drying oven, adjust the temperature to 300°C, and heat-treat for 1 minute; repeat this process 3 times to obtain a transparent composite film; soak the composite film...

Embodiment 2

[0029] Take 50mL of deionized water, 50mL of propanol, 70mL of isopropanol, and 8g of KCl, stir to make them evenly mixed, and obtain an alcohol-water mixed solution of KCl; take 10g of perfluorosulfonic acid resin (chinafion, EW900) produced by Shandong Dongyue Company , 150mL propanol, 30mL ethanol to prepare a perfluorosulfonic acid resin solution, then add 3g of alkyl benzyl end-capped phenol ether as an active agent; titrate the alcohol-water mixed solution of KCl into the prepared resin-alcohol solution to pH Value is 7.5, obtains K-type resin alcohol solution; Place the clean porous polytetrafluoroethylene (PTFE) that thickness is 20um (PTFE) in this solution and soak for 3 minutes, then take out and adopt double-wheel wheel to roll and roll once, the film after rolling Put it into a vacuum drying oven, adjust the temperature to 290°C, and heat-treat for 5 minutes; repeat this process twice to obtain a transparent composite film; soak the composite film in ethanol for 10...

Embodiment 3

[0031] Take 150mL propanol, 10gCsCl, stir to mix them evenly, and obtain the alcohol-water mixed solution of CsCl; take 12g F-type perfluorosulfonic acid resin produced by Dupont, 80mL propanol, and 80mL ethanol to obtain a perfluorosulfonic acid resin solution , and then add 4g of dialkyl-capped alcohol ether as an active agent; the alcohol-water mixed solution of CsCl is titrated into the prepared resin alcohol solution, so as to obtain the Cs type resin alcohol solution; the clean porous polytetrafluoroethylene with a thickness of 10um Ethylene (PTFE) is immersed in this solution for 10 minutes, then taken out and rolled by double-wheel rolling, the rolled film is placed in a vacuum drying oven, adjusted to 160°C, and heat-treated for 2 minutes; repeat this process 5 times , a transparent composite membrane was obtained; the composite membrane was soaked in ethanol for 8 minutes, then soaked in boiling deionized water for 8 minutes, dried naturally and then baked in a drying...

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Abstract

A process for preparing the high-molecular reinforced porous proton exchanging membrane used for fuel battery includes such steps as using the solution containing alkali-metal ions to treat the solution of perfluorosulfonic resin to obtain M-type perflworosulfonic resin, combining it to porous teflon membrane, and heat treating at 345 deg.C for high adhesion. Its advantages are high air tightness, strength and proton transfer power.

Description

technical field [0001] The invention relates to a method for preparing a porous macromolecule reinforced proton exchange membrane for a proton exchange membrane fuel cell. Specifically, the invention relates to a method for preparing a composite proton exchange membrane for a fuel cell by using an alkali metal ion-exchanged perfluorosulfonic acid resin. Background technique [0002] Proton exchange membrane (PEM) is the key material of proton exchange membrane fuel cell (PEMFC), and its performance characteristics are closely related to the output performance of the fuel cell. An ideal proton exchange membrane should not only have good proton conductivity and chemical stability, but also low gas permeability, sufficient mechanical strength and good dimensional stability [Fuel Cells and Their Applications, 1996, Chapter4 ]. [0003] At present, proton exchange membrane fuel cells mainly use perfluorosulfonic acid proton exchange membranes, such as the Nafion series membrane...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/12B01D71/36H01M8/02H01M8/10H01M4/94H01M2/16C08J5/22C25B13/08H01M8/1018
CPCY02E60/12Y02E60/521Y02P70/50Y02E60/50
Inventor 唐浩林潘牧何秀冲王晓恩木士春袁润章
Owner WUHAN UNIV OF TECH
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