Tetrafluoroethylene triple perfluorinated resin and application thereof as ion-exchange membrane reinforcing material

A technology of tetrafluoroethylene and fluororesin, which is applied in the field of fluoropolymers, can solve the problems that it is difficult to melt and extrude into filaments, it is difficult to achieve, and it affects the thermal stability of polymers.

Active Publication Date: 2010-07-14
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, since the perfluoromethyl vinyl ether monomer has a small methoxy group, the melt viscosity of the polymer is relatively high, and it is difficult to melt and extrude it into filaments quickly. To prevent the crystallization of polytetrafluoroethylene, ether The content is higher, and the higher ether content is bound to affect the thermal stability of the polymer
The commonly used tetrafluoroethylene and perfluoromethyl vinyl ether binary polymer resins are difficult to meet the requirements of maintaining the thermal stability of the polymer at high temperature and rapidly extruding into filaments to prepare polymer fibers.

Method used

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  • Tetrafluoroethylene triple perfluorinated resin and application thereof as ion-exchange membrane reinforcing material
  • Tetrafluoroethylene triple perfluorinated resin and application thereof as ion-exchange membrane reinforcing material
  • Tetrafluoroethylene triple perfluorinated resin and application thereof as ion-exchange membrane reinforcing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 23.2g of melamine derivatives with perfluoroalkyl ether chain segments and 185g of distilled water as dispersant / solvent in a 1L high-pressure stainless steel reaction kettle equipped with stirring, heating, and nitrogen feeding devices, and perfluoropropyl vinyl ether 3.02g and 0.2g of benzoyl peroxide, replace the air in the reactor with high-purity nitrogen, introduce 105g of tetrafluoroethylene, 8.76g of perfluoromethyl vinyl ether, heat up to 80°C and stir for 6 hours. After the reaction Cool and deflate to make the pressure inside the kettle become normal pressure, release the product from the discharge pipe, precipitate in a large amount of water, filter to obtain a powder product, wash with distilled water several times, and dry under vacuum at 100°C. Dispersant and water product, liquid separation and recycling.

[0037] The prepared polymer material is tested by Fourier transform infrared and shows that the weight percentage of tetrafluoroethylene is 96.54...

Embodiment 2

[0039]Add 23.2g of melamine derivatives with perfluoroalkyl ether chain segments and 185g of distilled water as dispersant / solvent in a 1L high-pressure stainless steel reaction kettle equipped with stirring, heating, and nitrogen feeding devices, and perfluoropropyl vinyl ether 8.06g and 0.2g of benzoyl peroxide, replace the air in the reactor with high-purity nitrogen, pass through 105g of tetrafluoroethylene, 8.76g of perfluoromethyl vinyl ether, heat up to 80°C and stir for 6h, cool down after the reaction , release gas, make the pressure in the kettle become normal pressure, release the product from the discharge pipe, precipitate in a large amount of water, filter to obtain a powder product, wash with distilled water several times, and dry under vacuum at 100°C. Dispersant and water product, liquid separation and recycling.

[0040] The prepared polymer material is tested by Fourier transform infrared and shows that the weight percentage of tetrafluoroethylene is 95.58% ...

Embodiment 3

[0042] Add 23.2g of melamine derivatives with perfluoroalkyl ether chain segments and 185g of distilled water as dispersant / solvent in a 1L high-pressure stainless steel reaction kettle equipped with stirring, heating, and nitrogen feeding devices, and perfluoropropyl vinyl ether 3.02g and 0.2g of benzoyl peroxide, replace the air in the reactor with high-purity nitrogen, pass through 105g of tetrafluoroethylene, 21.81g of perfluoromethyl vinyl ether, heat up to 80°C and stir for 6h, cool down after the reaction , release gas, make the pressure in the kettle become normal pressure, release the product from the discharge pipe, precipitate in a large amount of water, filter to obtain a powder product, wash with distilled water several times, and dry under vacuum at 100°C. Dispersant and water product, liquid separation and recycling.

[0043] The prepared polymer material is tested by Fourier transform infrared and shows that the weight percentage of tetrafluoroethylene is 93.19...

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Abstract

The invention discloses a fluorine-containing polymer and application thereof as an ion-exchange membrane reinforcing material. The fluorine-containing polymer is tetrafluoroethylene triple perfluorinated resin with a structure of Formula (I) as shown in the attached picture, which is prepared by polymerization of tetrafluoroethylene, a perfluorinated methyl vinyl ether monomer and a perfluorinated propyl vinyl ether monomer initiated by free radicals in the presence of a dispersant, a solvent and an initiator. The fluorine-containing polymer fiber can be prepared through melt spinning with a melt-spinning device and can be woven into fiber nets through the textile technology so as to be used as reinforcing nets for proton exchange membranes and chlor-alkali ion-exchange membranes, thereby achieving the function of enhancing the membrane strength.

Description

technical field [0001] The invention relates to fluorine-containing polymer technology, in particular to a tetrafluoroethylene ternary perfluorinated resin and its application as an ion membrane reinforced net material. Background technique [0002] Since DuPont processed perfluorosulfonic acid resins into perfluorosulfonic acid ion exchange membranes in the 1970s and 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. Research. During the installation and application of the ionic membrane, in order to make the membrane have the technical characteristics of resisting various stress impacts and maintain good dimensional stability to meet the needs of various processes, the perfluorinated ionic membrane must be reinforced with a skeleton material. In order to make the membrane meet the requirements of high performance and practicality. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/26C08F216/14D01F6/12B01D69/10B01D71/44B01D71/38B01D71/36C25B1/46C25B13/08
Inventor 张永明徐安厚高自宏李文薇张恒
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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