Perfluoro - resin with ion exchange, and application

A technology of ion exchange and ion exchange capacity, applied in the field of perfluororesin and its application as ion exchange fiber material, to increase the effective area, reduce membrane resistance and cell voltage, and solve technical problems

Inactive Publication Date: 2007-07-25
SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Since DuPont processed perfluorosulfonic acid resins into perfluorosulfonic acid ion exchange membranes in the 1970s and this membrane has played a big role in the chlor-alkali industry and proton exchange membrane fuel cells, per

Method used

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  • Perfluoro - resin with ion exchange, and application
  • Perfluoro - resin with ion exchange, and application
  • Perfluoro - resin with ion exchange, and application

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1:

[0029] Perfluorosulfonyl vinyl ether (n=2, molecular weight is 612g / mol), the molecular formula is:

[0030]

[0031] The synthesis method is as follows:

[0032] Combine tetrafluoroethylene with liquid SO 3 The sultone is prepared by reaction, and the purified sultone product is catalyzed by a composite fluoride ion catalyst and reacted with hexafluoroepoxy to prepare a perfluoroacyl fluoride product with sulfonyl fluoride end groups, which has sulfonyl fluoride end groups. The perfluorinated compounds undergo cleavage and decarboxylation at high temperatures to obtain perfluorinated ether compounds.

Example Embodiment

[0033] Example 2:

[0034] Add 23.2g of perfluoroalkyl ether containing melamine structure and 185g of distilled water as dispersant / solvent into a 1L high-pressure stainless steel reactor equipped with stirring, heating, and nitrogen inlet device, perfluorosulfonyl vinyl ether 5.3g(n =2) and 0.2g of benzoyl peroxide, replace the air in the reactor with high-purity nitrogen, introduce 92.8g of tetrafluoroethylene and 1.4g of perfluoromethyl vinyl ether, heat up to 80℃ and stir for 3h, and the reaction is complete After cooling and venting, the pressure in the kettle becomes normal pressure, and the product is discharged from the discharge pipe, precipitated in a large amount of water, filtered to obtain a powdered product, washed with distilled water several times, and dried under vacuum at 100°C. The dispersant is separated from the water and recycled.

[0035] The prepared polymer material perfluoro resin has passed the fluorine nuclear magnetic test showed that the weight perce...

Example Embodiment

[0036] Example 3:

[0037] Add 23.2g of perfluoroalkyl ether containing melamine structure and 185g of distilled water as dispersant / solvent into a 1L high-pressure stainless steel reactor equipped with stirring, heating, and nitrogen introduction devices. Perfluorosulfonyl vinyl ether 6.3g(n =2) and 0.2g of benzoyl peroxide, replace the air in the reactor with high-purity nitrogen, pass in 102.8g of tetrafluoroethylene and 1.84g of perfluoropropyl vinyl ether, heat up to 80°C, stir and react for 3h, the reaction is complete After cooling and degassing, the pressure in the kettle becomes normal pressure, and the product is discharged from the discharge pipe, precipitated in a large amount of water, filtered to obtain a powdered product, washed with distilled water several times, and dried under vacuum at 100°C. The dispersant is separated from the water and recycled.

[0038] The DTA test of the prepared polymer material perfluororesin shows that its thermal decomposition temperat...

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Abstract

This invention discloses a perfluoro resin containing sulfonylfluoride groups, which is shown in formula 1. The perfluoro resin has ion exchange function, and is prepared by free radical copolymerization of perfluorosulfonyl vinyl ether, tetrafluoroethylene and alkyl vinyl ether in the presence of dispersant, solvent and initiator. The dispersant/solvent is mixed solution of melamine derivative containing linear perfluoro hydrocarbon and water. The fluorine-containing polymer can be melt-spun into polymer fibers, which can be woven into fiber network that can be used as the reinforcing network material for ion exchange membranes and chlor-alkali ion membrane to reinforce and improve the ion exchange ability.

Description

technical field [0001] The invention relates to the technology of fluorine-containing fine chemicals, and relates to a perfluororesin and its application as an ion exchange fiber material. Background technique [0002] Since DuPont processed perfluorosulfonic acid resins into perfluorosulfonic acid ion exchange membranes in the 1970s and this membrane has played a big role in the chlor-alkali industry and proton exchange membrane fuel cells, perfluorosulfonic acid ion exchange membranes have been widely used in countries all over the world. It has been widely studied, but only the "Nafion" type perfluorosulfonic acid resin of DuPont in the United States has been commercialized. The data provided by the imported ion composite membrane at present shows that there are two types of reinforcing mesh materials used in these membrane materials: polytetrafluoroethylene and meltable polytetrafluoroethylene. These perfluorinated reinforced fabrics are a non-ion exchange function. Ins...

Claims

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Application Information

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IPC IPC(8): C08F214/26D01D5/08C08J5/22
Inventor 高自宏张永明秦胜
Owner SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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