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Preparation method and application of fiber with high ion exchange volume and high strength

An ion-exchange, high-strength technology, applied in cation exchange materials, fiber treatment, fiber chemical characteristics, etc., can solve the uncontrollable position and quantity of C-C bond breakage, mechanical properties, heat resistance, chemical corrosion resistance, and durability Lowering and other issues

Active Publication Date: 2010-04-21
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, many studies have made ETFE functional by high-energy ray irradiation. One disadvantage of this irradiation method is that the location and number of C-C bond breaks are uncontrollable during the irradiation process. The mechanical properties of the material itself, Reduced heat resistance, chemical resistance, and durability

Method used

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  • Preparation method and application of fiber with high ion exchange volume and high strength
  • Preparation method and application of fiber with high ion exchange volume and high strength
  • Preparation method and application of fiber with high ion exchange volume and high strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Embodiment 1: (solution polymerization, fluorocarbon solvent, perfluoroalkyl acyl peroxide initiator)

[0076] Polymerization monomers are selected from tetrafluoroethylene, ethylene, phosphate terminal alkoxy vinyl ether monomer (molecular formula: (CH 3 O) 2 OPCF 2 CF 2 CF 2 OCF=CF 2 (i.e. n=0, Rf'=F, a=2, b=0, A=-PO(OCH 3 ) 2 ) Molecular weight 356g / mol) carry out solution radical copolymerization.

[0077] Clean and fully dry the 10L stainless steel autoclave, vacuumize it, and replace it with nitrogen three times until the oxygen content is controlled below 10ppm, then vacuumize it to -0.1MPa, put 5.8L perfluorocarbon solvent, 560g phosphate terminal alkoxy Alkenyl ether monomer (molecular formula: (CH 3 O) 2 OPCF 2 CF 2 CF 2 OCF=CF 2 Molecular weight 356g / mol) into the reaction kettle, stirred and heated up to 40 ° C, after the system temperature was constant, added 40ml containing 3.94g perfluorobutyryl compound (CF 3 CF 2 CF 2 CO-OO-OCCF 2 CF 2...

Embodiment 2

[0083] Embodiment 2: (solution polymerization, fluorocarbon solvent, perfluoroalkyl acyl peroxide initiator)

[0084] Polymerization monomers are selected from tetrafluoroethylene, ethylene, and phosphate-terminated alkoxy vinyl ether monomers (molecular formula: (PhO) 2 OPCF 2 CF 2 CF 2 OCF=CF 2 (i.e. n=0, Rf'=F, a=2, b=0, A=-PO(OPh) 2 ) Molecular weight 480g / mol) carry out solution radical copolymerization.

[0085] Clean and fully dry the 10L stainless steel autoclave, vacuumize it, and replace it with nitrogen three times until the oxygen content is controlled below 10ppm, then vacuumize it to -0.1MPa, add 5.8L perfluorocarbon solvent, 260g phosphate terminal alkoxy Base vinyl ether monomer (molecular formula: (PhO) 2 OPCF 2 CF 2 CF 2 OCF=CF 2 Molecular weight 480g / mol) into the reaction kettle, stirred and heated up to 40 ° C, after the temperature of the system is constant, add 40ml containing 4.54g perfluorobutyryl compound (CF 3 CF 2 CF 2 CO-OO-OCCF 2 CF ...

Embodiment 3

[0090] Embodiment 3 (suspension polymerization, persulfate is initiator, and water is as dispersion medium)

[0091] Polymerization monomers are selected from tetrafluoroethylene, ethylene, and phosphate terminal alkoxy vinyl ether monomers (molecular formula: CF 2 =CFO-CF 2 CF(CF 3 )O-CF 2 CF 2 PO(OCH 3 ) 2 , (i.e. n=1, Rf'=F, a=1, b=0, A=-PO(OCH 3 ) 2 ) molecular weight 472g / mol) carry out solution radical copolymerization.

[0092] Clean the 10L stainless steel autoclave and vacuumize it, fill it with high-purity nitrogen and replace it three times until the oxygen content is below 10ppm, then vacuumize it to -0.1MPa, and add 4.2g of perfluoropropoxy ammonium carboxylate ( Molecular formula CF 3 CF 3 CF 2 OCFCF 3 CF 2 -OCFCF 3 COONH 4 ) of pure water 6L, 120g phosphate alkyl end group vinyl ether monomer (CF 2 =CFO-CF 2 CF(CF 3 )O-CF 2 CF 2 PO(OCH 3 ) 2 , molecular weight 472g / mol), heat up to 70°C, feed tetrafluoroethylene, ethylene mixed gas (mixing ...

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Abstract

The invention discloses fluororesin with high ion exchange volume and high strength, which is formed by copolymerizing tetrafluoroethylene, ethylene and one or more monomers having the structure of the general formula (I) (disclosed in the specification), wherein in the general formula (I), a is equal to 0-5, b is equal to 0-5, the summation of a and b is not equal to 0, and n is equal to 0-2; Rf and Rf' are selected from -F, -Cl, -Br or -CzF2z, and z is equal to 1-5; A is -PO(OR1)(OR2); and R1 and R2 are selected from -H, -CmH2m+1, -Ph and substituted benzene, and m is equal to 1-10. The molecular weight of the fluororesin with high ion exchange volume and high strength is 200-1,500 thousands. Melt spinning is carried out on the fluorine-containing polymer having high ion exchange function and high mechanical strength by adopting corrosion resistant alloy melt spinning equipment to prepare polymer fibers, and then the fibers are woven into a fiber net having the ion exchange function by using a weaving technology. The fiber net can be used as an enhancement net material of a proton exchange membrane and a chlor-alkali ion membrane to achieve the purpose of simultaneously improving the strength of the membrane materials, increasing the adhesion force of the fibers and the membranes and improving the ion exchange capacity.

Description

technical field [0001] The invention belongs to the field of fluorine-containing polymer materials, and relates to a class of fluorine resin with high ion exchange function and high mechanical strength and its application as ion exchange membrane reinforcement material. 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, the application of perfluorinated ion exchange membranes has been widely used in countries all over the world. extensive research. 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, fusibl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/26C08F210/02C08F216/14C08F2/06C08F2/18C08F2/22D01F6/30D01F6/32D06M11/38H01M8/02H01M2/16B01J39/20C25B1/46C25B13/08H01M8/102H01M8/106
CPCY02E60/12Y02E60/50
Inventor 高自宏秦胜魏茂祥李勇
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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