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A kind of polyether ketone ion exchange membrane and its preparation method and application

An ion exchange membrane and polyether ketone technology, applied in the field of ion exchange membrane and amphoteric ion exchange membrane, can solve the problems of service life and battery efficiency that are difficult to meet application requirements, and achieve the advantages of cheap raw materials, hindering penetration and reducing product cost. Effect

Inactive Publication Date: 2018-01-05
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting products are difficult to meet application requirements in terms of service life, battery efficiency, etc.
At present, there is no ion-exchange membrane product specially developed for VRB performance requirements, so new, cheap, high-performance, and long-life ion-exchange membrane products need to be urgently developed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]Add 120ml of concentrated sulfuric acid and 2g of fully dried PEK particles with a number average molecular weight of 1000~5000 into a 250mL beaker, place in a water bath, adjust the temperature of the water bath to 25°C, and mechanically stir at a speed of 350rpm until the PEK particles are completely dissolved Then adjust the temperature of the water bath to 0°C, add 40mL of chloromethyl methyl ether, mechanically stir the polymerization reaction at 300rpm for 1.5h, then let it stand for 1.5h for aging reaction; then pour the solution after the above polymerization reaction into ice Precipitate in water mixture, filter, and wash until the pH value is 7, and then dry; dissolve the above-mentioned completely dried polymer in N-methylpyrrolidone according to 10% by mass, and dissolve the dissolved solution at 60 ° C Cast into a film and dry; soak the above-mentioned completely dried film in N-ethylaniline at 45°C in a water bath for 12 hours, wash until the pH value is 7, ...

Embodiment 2

[0048] Add 5ml of concentrated sulfuric acid and 1g of fully dried PEKK particles with a number average molecular weight of 2000~8000 into a 250mL beaker, place in a water bath, adjust the temperature of the water bath to 45°C, and continuously feed sulfur dioxide with a volume ratio of 1:1 Mixed gas with chlorine gas, the gas flow rate is 20ml / min, the escaped waste gas is absorbed with 1mol / l NaOH solution, and the reaction is mechanically stirred at 300 rpm for 3h; adjust the temperature of the water bath to 0°C, and add 20mL of chloromethyl ethyl ether , mechanically stirred the polymerization reaction at 200rpm for 1.5h, and then left it to mature for 1.5h; quickly poured the solution after the above polymerization reaction into deionized water at 5°C for precipitation, filtered, washed until the pH value was 7, and then dried ; The above completely dried polymer was dissolved in N,N-dimethylformamide at 15% mass fraction, and the dissolved solution was cast at 60°C to for...

Embodiment 3

[0050] Add 200ml of saturated aqueous solution of sodium metabisulfite and 2g of fully dried PEEKK powder with a molecular weight of 1000~8000 into a 250mL beaker, place in a water bath, adjust the temperature of the water bath to 60°C, and mechanically stir at 400rpm for 4 hours; adjust the water bath When the temperature reaches 0°C, add 50mL of chloromethyl methyl ether, mechanically stir the reaction at 300rpm for 1.5h, then let it stand and mature for 1.5h; quickly pour the solution after the above polymerization reaction into 10°C deionized water for precipitation and filtration, and washed until the pH value was 7, and then dried; the above-mentioned completely dried polymer was dissolved in N,N-dimethylformamide at a mass fraction of 15%, and the dissolved solution was cast at 60°C to form a film and dry. The completely dried membrane was soaked in N,N-dimethylbenzylamine in a 45°C water bath for 12 hours, washed until the pH value was 7, and dried to obtain a PEK-base...

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Abstract

The invention proposes a polyether ketone ion exchange membrane and a preparation method and application thereof. The preparation method comprises the processes of sulfonation, chloromethylation, membrane forming and quaternization on one or more of raw materials of polyether ketone (PEK), polyethylene ketone ketone (PEKK) and poly ether ether ketone ketone (PEEKK). The prepared exchange membrane simultaneously contains a sulfonic group and an ammonium group on molecules, thus, the exchange membrane becomes an amphoteric ion exchange membrane compatible with a function of cation and anion exchange, and protons can be effectively transmitted; and meanwhile, vanadium ion penetration can be effectively prevented through a Donnan effect, and the ion change membrane with excellent performance can be specially used for a vanadium redox battery (VRB).

Description

technical field [0001] The invention relates to the technical field of ion exchange membranes, in particular to the technical field of amphoteric ion exchange membranes. Background technique [0002] All-vanadium redox flow battery (abbreviated as vanadium battery, abbreviated as VRB) has many advantages such as high energy density, fast response, low cost, safe operation, low maintenance cost, long life, designable capacity, and environmental protection. It has broad application prospects in smart grid, large-scale energy storage peak load regulation, electric vehicle charging power supply and office emergency power supply. The ion exchange membrane is an important component of VRB, which has the function of separating the positive and negative electrolytes to prevent battery short circuit, while allowing charge carriers (such as H + , HSO 4 － etc.) to pass freely to ensure the balance of the positive and negative poles to form a battery circuit and other important funct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/18H01M8/02H01M8/0202H01M8/0221
CPCH01M8/02H01M8/0202H01M8/0221H01M8/188Y02E60/50
Inventor 马素德刘春曾浩
Owner XIHUA UNIV
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