Functional fluororesins and application thereof

Abstract

The invention discloses fluororesins with an ion exchanging function, which comprise tetrafluoroethylene, ethylene and one or pluralities of monomers with structures illustrated by following general formulas (I): in the formulas, a=0-5, b=0-5, a+b= / 0, n=0-2; Rf and Rf' are chosen from -F, -C1, -Br or -CzF2z+1, wherein z=1-5; A is chosen from -SO2F, -SO2C1, -SO2Br or -SO2NR1R2; and R1 and R2 are chosen from -H or -CmH2m+1, wherein m=1-10. Fluorine-contained polymers with the ion exchanging function adopt an anticorrosive hastelloy melt spinning device to prepare polymer fibers with melt spinning serving as materials, the fibers are woven into fiber nets with the ion exchanging function via spinning technology, and the fiber nets serve as strengthening net materials of fuel battery proton exchange membranes and chlor-alkali ion membranes, thereby achieving the purposes of simultaneously improving the capabilities of membrane materials in strengthening and increasing adhesion between the fibers and the membranes and improving the exchange capability of the ions.

Description

technical field The invention belongs to the field of fluorine-containing polymer materials, and relates to a class of functional fluorine resins and their application as ion-exchange membrane reinforced fiber materials. Background technique Since perfluorinated sulfonic acid ion exchange membranes have shown their talents in the chlor-alkali industry and proton exchange membrane fuel cells, the application of perfluorinated ion exchange membranes has been extensively studied in various countries around the world. Whether perfluorinated ion exchange membranes are used in the chlor-alkali industry or in fuel cells, the currently known technologies need to be reinforced with reinforcing skeleton materials. Whether they are reinforced with microporous materials or fiber reinforced, these reinforcing materials are nothing more than PTFE. Ethylene, fusible polytetrafluoroethylene and a small amount of sacrificial fiber material for auxiliary purposes. These perfluorinated reinfo...

AI Technical Summary

Problems solved by technology

At present, many studies are to functionalize ETFE by irradiation. One disadvantage of this irradiation method is that the C-C bond on the surface of the membrane is broken during the irradiation process, and the broken chemical bonds cannot guarantee the formation of sulfonic acid. The mechanical properties, heat resistance, chemical corrosion resistance and durability of the material itself will be reduced

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