Perfluorinated ion exchange resin as well as preparation method and application thereof

A technology for exchanging resin and perfluorinated ions, which is applied in chemical instruments and methods, semi-permeable membrane separation, final product manufacturing, etc., and can solve the problems of insufficient resin molecular weight and high temperature resistance

Active Publication Date: 2010-07-07
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

[0007] The purpose of the present invention is to solve the contradiction between the ion exchange capacity and mechanical strength of the existing perfluorosulfonic acid resin, and overcome the shortcomings of not being able to withstand high temperatures, and provide a thermally stable resin that can meet the requirements of both mechanical strength and ion exchange capacity. Good perfluororesin and its preparation method and application
[0008] The object of the present invention is also to solve the problem that the chain transfer reaction of the short side group sulfonyl fluoride alkenyl ether monomer occurs in the polymerization process and the molecular weight of the obtained resin is not high enough

Method used

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  • Perfluorinated ion exchange resin as well as preparation method and application thereof
  • Perfluorinated ion exchange resin as well as preparation method and application thereof
  • Perfluorinated ion exchange resin as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Reactor is cleaned and adds 5.0L deionized water, 500ml contains 240g ammonium phosphonate pendant vinyl ether monomer (F2 C=CF-O-CF 2 CF 2 -PO 3 2- (NH 4 + ) 2 ) aqueous solution and 125g nonylphenol polyoxyethylene ether NP-10, start the stirring device, vacuumize and fill high-purity nitrogen for replacement three times, after testing that the oxygen content in the reactor is below 1ppm, vacuumize, and feed the liquid through the liquid feed valve Add 400g sulfonyl fluoride pendant vinyl ether monomer (1) (F 2 C=CF-O-CF 2 CF 2 -SO 2 F) and 550g sulfonyl fluoride pendant vinyl ether monomer (2) (F 2 C=CF-O-CF 2 CF 2 CF 2 CF 2 -SO 2 F) After that, fill the reaction kettle with tetrafluoroethylene monomer to a pressure of 2.9MPa, raise the temperature to 20°C, and add 2.6g perfluorobutyryl compound (CF 3 CF 2 CF 2 CO-OO-CCF 2 CF 2 CF 3 ) initiates the polymerization reaction, and continuously feeds tetrafluoroethylene (CF 2 = CF 2 ) monomer to keep...

Embodiment 2

[0054] Reactor is cleaned and adds 5.0L deionized water, 500ml contains 105g sodium phosphonate pendant vinyl ether monomer (F 2 C=CF-O-CF 2 CF 2 -PO 3 2- 2Na + ) aqueous solution and 150g nonylphenol polyoxyethylene ether NP-10, start the stirring device, vacuumize and fill with high-purity nitrogen for replacement three times, after testing that the oxygen content in the reactor is below 1ppm, vacuumize and feed the Add 500g sulfonyl fluoride pendant vinyl ether monomer (1) (F 2 C=CF-O-CF 2 CF 2 -SO 2 F) and 405g sulfonyl fluoride pendant vinyl ether monomer (2) (F 2 C=CF-O-CF 2 CF 2 CF 2 CF 2 -SO 2 After F), fill the reaction kettle with tetrafluoroethylene monomer to a pressure of 2.9MPa, raise the temperature to 35°C, and add 8.0g of perfluoropropoxypropyl peroxide (CF 3 CF 2 CF 2 OCF (CF 3 )CO-OO-CCF(CF 3 )OCF 2 CF 2 CF 3 ) initiates the polymerization reaction, and continuously feeds tetrafluoroethylene (CF 2 = CF 2 ) monomer to keep the reaction ...

Embodiment 3

[0057] Reactor is cleaned and adds 5.0L deionized water, 500ml contains 380g potassium phosphonate pendant vinyl ether monomer (F 2 C=CF-O-CF 2 CF(CF 3 )OCF 2 CF 2 -PO 3 2- 2K + ) aqueous solution and 95g nonylphenol polyoxyethylene ether NP-10, start the stirring device, vacuumize and fill with high-purity nitrogen for replacement three times. Add 300g sulfonyl fluoride pendant vinyl ether monomer (1) (F 2 C=CF-O-CF 2 CF 2 -SO 2 F) and 610g sulfonyl fluoride pendant vinyl ether monomer (2) (F 2 C=CF-O-CF 2 CF 2 CF 2 CF 2 -SO 2 F) After that, fill the reaction kettle with tetrafluoroethylene monomer to a pressure of 3.2MPa, heat up to 80°C, add 320g of 10% ammonium persulfate aqueous solution with a metering pump to initiate polymerization, and continuously feed tetrafluoroethylene (CF 2 = CF 2 ) monomer to keep the reaction pressure at 3.2MPa, after reacting for 3h, stop adding tetrafluoroethylene monomer. Cool down the reaction kettle through the cooling ci...

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Abstract

The invention provides a perfluorinated ion exchange resin as well as a preparation method and application thereof, wherein the perfluorinated ion exchange resin is provided with a phosphonate side group and sulfonyl fluoride short side groups with two different structures and has the function of high exchange capacity. The perfluorinated ion exchange resin is formed by tetrafluoroethylene, sulfonyl fluoride alkene ether monomers with the short side groups in two different structures, and a phosphonate side group alkene ether monomer through multi-copolymerization, and the repeated unit is represented by the following formula. An ion exchange membrane made of the resin can not only have various chemical media resistance, but also have high iron exchange capacity, high conductivity, high mechanical strength, high dimensional stability, low membrane resistance and long service life and is applicable for a fuel cell and a high-temperature fuel cell.

Description

technical field [0001] The invention belongs to the field of fluorine-containing polymer materials, and relates to a functional perfluorinated ion-exchange resin with high exchange capacity and its preparation method and application, in particular to a sulfonyl ion exchange resin with phosphonate side groups and two different structures The multi-component copolymerized perfluorinated ion-exchange resin with short fluorine side groups and its preparation method and application. Background technique [0002] Since DuPont processed perfluorosulfonic acid resins into perfluorosulfonic acid ion exchange membranes in the 1970s and applied the membranes in the chlor-alkali industry and proton exchange membrane fuel cells, perfluorinated ion exchange resins have been widely used in countries all over the world. Extensive research. [0003] Fluorine-containing ion-exchange membranes containing ion-exchange groups, especially sulfonic acid groups and carboxylic acid groups, are more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/26C08F216/14C08F2/30B01D71/44B01D71/36B01D71/38H01M8/02H01M4/94H01M8/10H01M8/1039H01M8/1072H01M8/124
CPCY02E60/522Y02E60/50Y02P70/50
Inventor 张永明高自宏秦胜张恒李勇魏茂祥王军
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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