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Perfluorinated ion exchange resin with high exchange capacity, preparation method and application thereof

An exchange capacity, perfluororesin technology, applied in chemical instruments and methods, semi-permeable membrane separation, final product manufacturing, etc., can solve problems such as the inability to meet high-temperature use requirements, and achieve good high-temperature mechanical stability and high chemical stability. , the effect of high ion exchange capacity

Active Publication Date: 2010-05-19
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

At present, the sulfonic acid resins with long pendant sulfonyl fluorides known in the field of fuel cells can no longer meet the requirements of high temperature use.

Method used

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  • Perfluorinated ion exchange resin with high exchange capacity, preparation method and application thereof
  • Perfluorinated ion exchange resin with high exchange capacity, preparation method and application thereof
  • Perfluorinated ion exchange resin with high exchange capacity, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Clean the reactor and add 5.0L deionized water, 100g sodium dodecylbenzenesulfonate and 125g nonylphenol polyoxyethylene ether NP-10 emulsifier, start the stirring device, vacuumize and fill with high-purity nitrogen for three times, After testing that the oxygen content in the reaction kettle is below 1ppm, vacuumize, and add 500g of sulfonyl fluoride pendant vinyl ether monomer (1) (F 2 C=CF-O-CF 2 CF 2 -SO 2 F) and 650g sulfonyl fluoride pendant vinyl ether monomer (2) (F 2 C=CF-O-CF 2 CF 2 CF 2 CF 2 -SO 2 F) and 405g bromo pendant vinyl ether monomer (F 2 C=CF-O-CF 2 CF 2 -Br), 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 ) The monomer keeps the reaction pressure at 2.9 MPa, and adds 0.75 g of initiator to the...

Embodiment 2

[0086] Clean the reactor and add 5.0L of deionized water and 220g of sodium dodecylbenzenesulfonate, start the stirring device, vacuumize and replace with high-purity nitrogen three times, after testing that the oxygen content in the reactor is below 1ppm, vacuumize , 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 F) and 225g bromo pendant vinyl ether monomer (F 2 C=CF-O-CF 2 CF 2 CF 2 After Br), fill the reaction kettle with tetrafluoroethylene monomer to a pressure of 2.9MPa, raise the temperature to 35°C, and add 8.0g 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 pressure at 2.9MPa, add 2.3g of initiator to the system every 25min, stop adding the...

Embodiment 3

[0089] Wash the reactor and add 5.0L deionized water, 120g sodium dodecylbenzenesulfonate and 95g nonylphenol polyoxyethylene ether NP-10 emulsifier, start the stirring device, vacuumize and fill with high-purity nitrogen for three times, After testing that the oxygen content in the reaction kettle is below 1ppm, vacuumize, and add 300g of 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) and 250g bromo pendant vinyl ether monomer (F 2 C=CF-O-CF 2 CF 2 CF 2 CF 2 After Br), fill the tetrafluoroethylene monomer in the reaction kettle to a pressure of 3.2MPa, heat up to 80°C, add 10% ammonium persulfate aqueous solution 320g to initiate the polymerization reaction with a metering pump, and continuously feed tetrafluoroethylene (CF 2 = CF 2 ) monomer to keep the reaction pressure at 3.2MPa, after reacting for 3h, stop adding tetrafluoroet...

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Abstract

The invention provides a high exchange capacity perfluorinated resin of two types of short side-radical sulfonyl fluoride with different structures and bromine side-radical. The resin is a polyprotonic copolymer comprising the following components in total molar fraction: 50-85 percent of tetrafluoroethylene polymerization unit, 5-49 percent of the polymerization unit of the two types of short side-radical sulfonyl fluoride vinyl ether provided with different structures, and1-10 percent of bromine side-radical vinyl ether polymerization unit. A perfluorinated ion exchange membrane prepared by the resin not only has resistance to various chemical reagents, but also has high ion exchange capacity, electric conductivity, mechanical strength and dimensional stability, low membrane resistance and long service life, and is suitable for usage in fuel cells or high-temperature fuel cells. The invention also provides a preparation method and applications of the resin.

Description

technical field [0001] The invention belongs to the field of fluorine-containing polymer materials, and relates to a perfluorinated ion-exchange resin with high exchange capacity and its preparation method and application, in particular to a multi-component copolymerized high-exchange capacity perfluorinated ion-exchange resin 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 this membrane was used 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. Research. [0003] Fluorine-containing ion-exchange membranes containing ion-exchange groups, especially sulfonic acid groups and carboxylic acid groups, are more suitable for use as ion-exchange membranes for fuel cells and chlor-alkali electrolyzers due to their resistance to che...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/26C08F216/14C08F2/26C08F2/30B01D71/44B01D71/38B01D71/36H01M8/02H01M2/16H01M8/00H01M8/10H01M8/12C25B13/08C25B1/46H01M8/1039H01M8/1072
CPCY02E60/12Y02E60/521Y02E60/50Y02E60/525Y02P70/50
Inventor 张永明张恒秦胜高自宏王丽李勇宋学章
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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