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Crosslinked heterocyclic polyarylether alkaline electrolyte membrane and preparation method thereof

A technology of electrolyte membrane and polyarylether, which is applied in the cross field of polymer materials and membrane technology, can solve the problems of membrane electrode assembly difficulty in preparation, decrease of membrane mechanical properties, increase of membrane hydrophilicity, etc., and achieve ion exchange capacity and conductivity The effect of high efficiency, excellent mechanical properties and wide application

Inactive Publication Date: 2011-06-15
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, after the quaternization modification of polymers with high chloromethylation degree, the hydrophilicity of the membrane increases sharply, the swelling rate increases, and the mechanical properties of the membrane decrease sharply, which brings great difficulties to the preparation of membrane electrode assemblies.

Method used

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  • Crosslinked heterocyclic polyarylether alkaline electrolyte membrane and preparation method thereof
  • Crosslinked heterocyclic polyarylether alkaline electrolyte membrane and preparation method thereof
  • Crosslinked heterocyclic polyarylether alkaline electrolyte membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Dissolve 10 grams of chloromethylated phthalazinone-containing biphenyl polyetherketone (PPEK) in N, N-dimethylacetamide (DMAc) to obtain a 4% solution, add 0.001 mole of tetramethyl Methylenediamine (TMMDA), stirred at room temperature for 1 h, filtered, allowed to stand overnight, scraped on a glass plate to form a film, and dried at 40°C. Soak in trimethylamine aqueous solution for 20h at room temperature. The obtained ammonium membrane is immersed in a 1mol / L KOH solution to convert the anions in the membrane into hydroxide ions, fully washed with deionized water, and dried to obtain a cross-linked alkaline electrolyte membrane.

Embodiment 2

[0028] Dissolve 10 g of haloacylated phthalazinone-containing biphenyl polyethersulfone ketone (PPESK) in chloroform to obtain a 5% solution, add 0.015 mol of dimethylamine, and stir at 30° C. for 1.5 h. Add triethylamine aqueous solution and stir for a period of time, filter, let stand overnight, drool on a glass plate to form a film, and bake at 50°C for 12h. Then transfer to 2mol / L KOH solution to convert the anions in the membrane into hydroxide ions, fully wash with deionized water, and dry to obtain a cross-linked alkaline electrolyte membrane.

Embodiment 3

[0030] Dissolve a certain amount of chloromethylated phthalazinone-containing biphenyl polyether ketone ketone (PPEKK) in dimethyl sulfoxide to prepare an 8% casting solution. Add 0.0015 moles of 4,4'-bipyridine, react at 40°C for 18h, then add triethylamine aqueous solution, react at room temperature for a period of time, filter, let stand overnight, cast a film on a glass plate, and bake at 50°C for 12h. Then transfer to 2mol / L KOH solution to convert the anions in the membrane into hydroxide ions, fully wash with deionized water, and dry to obtain a cross-linked alkaline electrolyte membrane.

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Abstract

The invention discloses a crosslinked heterocyclic polyarylether alkaline electrolyte membrane and a preparation method thereof, belonging to the technical cross fields of high molecular materials and membranes. The preparation method comprises the following steps of: introducing an activated halogen atom to prepare halogenated heterocyclic polyarylether through a chloromethylation or halogenated acylation reaction; then, performing a quaternization crosslinking reaction by using a composite quaternization agent, and forming a membrane; and finally, transferring the solution into an alkaline solution to carry out a quaternization reaction to obtain the crosslinked heterocyclic polyarylether alkaline electrolyte membrane. The alkaline membrane prepared by using the method has high chemical stability, mechanical stability ad thermal stability, high ionic conductance and extensive application in the fields of alkaline fuel cells and related electrochemical devices.

Description

technical field [0001] The invention belongs to the cross field of polymer materials and membrane technology, and relates to a cross-linked heterocyclic polyarylether alkaline electrolyte membrane and a preparation method thereof. Background technique [0002] The alkaline polymer electrolyte membrane is one of the core components of the alkaline polymer electrolyte membrane fuel cell (Alkaline Anion Exchange Membrane Fuel Cell, AAEMFC). At present, alkaline fuel cells have the problem of poor chemical stability of the alkaline polymer electrolyte membrane (APE) in a strong alkaline medium, which leads to the failure of the fuel cell, and the improvement of the chemical stability of the alkaline electrolyte membrane often reduces the ion conductivity. . Due to the harsh chemical and electrochemical environment of the alkaline fuel cell system, the requirements for the alkaline electrolyte membrane material are very high. The traditional quaternary ammonium salt polymer alk...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J3/24C08G65/48C08G75/23C08L71/12C08L81/06H01M8/02H01M2/16H01M8/1025
CPCY02E60/50Y02E60/12
Inventor 朱秀玲刘陟王光阜
Owner DALIAN UNIV OF TECH
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