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Hydrophilic fluorinated polymer and preparation method thereof

A high-polymer and hydrophilic technology, applied in the field of multi-component copolymerized perfluororesin and its preparation, can solve the problem of insufficient resin molecular weight, and achieve the effects of excellent anti-oxidation performance, high current efficiency and high dimensional stability

Active Publication Date: 2010-07-07
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

[0005] The technical task of the present invention is to solve the problem that the molecular weight of the obtained resin is not high enough due to the chain transfer reaction of the short side group sulfonyl fluoride alkenyl ether monomer in the prior art during the polymerization process, and to solve the problem of the perfluorosulfonic acid resin in the prior art. The uniform distribution of metal ions in the material, the problem of oxidation aging resistance and water retention of the membrane material during use, provide a multi-component hydrophilic fluorinated polymer with sulfonate side groups and its preparation method

Method used

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  • Hydrophilic fluorinated polymer and preparation method thereof
  • Hydrophilic fluorinated polymer and preparation method thereof
  • Hydrophilic fluorinated polymer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Embodiment 1, p=2, q=3

[0048] Reactor is cleaned and adds 4.0L deionized water, 1000ml contains 570g cerium sulfonate pendant vinyl ether monomer (1) ((F 2 C=CF-O-CF 2 CF 2 -SO 3 - ) 4 Ce 4+ ) and 450g cerium sulfonate pendant vinyl ether monomer (2) (F 2 C=CF-O-CF 2 --CF 2 CF 2 -SO 3 - ) 3 Ce 3+ ) aqueous solution, start the stirring device, vacuumize and replace with high-purity nitrogen three times, after the oxygen content in the test reactor is below 1ppm, vacuumize, fill the reactor with tetrafluoroethylene monomer until the pressure is 2.4MPa, and heat up to At 25°C, add 2.8g of perfluorobutyryl peroxide (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 ) monomer to keep the reaction pressure at 2.4 MPa, add 0.72 g of initiator to the system every 15 minutes, stop adding the initiator after reacting for 2 hours, let the reaction continue for 15 minutes, the...

Embodiment 2

[0051] Embodiment 2, p=2, q=3

[0052] Reactor is cleaned and adds 4.0L deionized water, 1000ml contains 605g cerium sulfonate pendant vinyl ether monomer (1) ((F 2 C=CF-O-CF 2 CF 2 -SO 3 - ) 3 Ce 3+ ) and 150g manganese sulfonate pendant vinyl ether monomer (2) ((F 2 C=CF-O-CF 2 -CF 2 CF 2 -SO 3 - ) 2 mn 2+) aqueous solution, start the stirring device, vacuumize and replace with high-purity nitrogen for three times, after the oxygen content in the test reactor is below 1ppm, vacuumize, fill the reactor with tetrafluoroethylene monomer until the pressure is 2.7MPa, and heat up to At 35°C, add 8.2g perfluoropropoxypropyl peroxide (CF 3 CF 2 CF 2 OCF (CF 3 )CO-OO-CCF(CF 3 )OCF 2 CF 2 CF 3 ) to initiate the polymerization reaction, continue to feed tetrafluoroethylene monomer to keep the reaction pressure at 2.7MPa, add 2.48g of initiator to the system every 25min, after reacting for 2.5h, stop adding the initiator, let the reaction continue for 25min, stop a...

Embodiment 3

[0055] Embodiment 3, p=2, q=3

[0056] Reactor is cleaned and adds 4.0L deionized water, 1000ml contains 500g molybdenum sulfonate pendant vinyl ether monomer (1) ((F 2 C=CF-O-CF 2 CF 2 -SO 3 - ) 3 Mo 3+ ) and 380g tungsten sulfonate pendant vinyl ether monomer (2) ((F 2 C=CF-O-CF 2 -CF 2 CF 2 -SO 3 ) 3 W 3+ ) aqueous solution, start the stirring device, vacuumize and replace with high-purity nitrogen for three times, after the oxygen content in the reactor is tested to be below 1ppm, vacuumize, fill the reactor with tetrafluoroethylene monomer until the pressure is 3.0MPa, and heat up to At 60°C, use a metering pump to add 300 g of 10 wt % ammonium persulfate aqueous solution to initiate the polymerization reaction, continuously feed tetrafluoroethylene monomer to keep the reaction pressure at 3.0 MPa, and stop adding tetrafluoroethylene monomer after reacting for 3 hours. Cool the reaction kettle through the cooling circulation system, and recover the unreacted ...

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Abstract

The invention provides a hydrophilic fluorinated polymer with a sulphonate side group, which is prepared by performing multi-component copolymerization on tetrafluoroethylene and two types of sulphonate side group vinyl ether monomers with different structures. A perfluorinated ion exchange membrane prepared by the assistance of the fluorinated polymer not only has resistance to various chemical mediums, but also has high electrical conductivity, high mechanical intensity, high size stability, low membrane resistance and long service life, and is suitable to be used in a fuel cell or a chlorine-alkali electrolytic cell. The invention also provides a preparation method and application of the hydrophilic fluorinated polymer.

Description

technical field [0001] The invention belongs to the field of fluorine-containing polymer materials, and relates to a hydrophilic fluorinated high polymer with bonded metal ion side groups and a preparation method thereof, in particular to a multi-component copolymerized perfluororesin with sulfonate side groups and its preparation method. 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, perfluorosulfonic acid ion exchange resins have been widely used in countries all over the world. has been extensively studied. 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 chemical degrad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/26C08F216/14C08F2/26H01M8/02H01M2/16C25B1/46C25B13/08H01M8/1025H01M8/1039H01M8/1072
CPCY02E60/12Y02E60/50
Inventor 张永明秦胜高自宏王丽李勇王汉利
Owner SHANDONG DONGYUE WEILAI HYDROGEN ENERGY MATERIAL CO LTD
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