Heterocycle polymer alkaline anion-exchange membrane and method for producing same

A basic anion and nitrogen heterocyclic compound technology, applied in the field of polymer ion exchange membranes, can solve the problems of mechanical property degradation, high swelling rate, quaternary ammonium group falling off, etc.

Inactive Publication Date: 2012-07-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under higher temperature or strong alkaline conditions, the quaternary ammonium group is easy to fall off from the polymer molecular chain, resulting in a decrease in the ion exchange capacity and ion conductivity of the anion exchange membrane (Danks TN, Slade R CT, Varcoe J R A.J Mater Chem 2003, 13:712-721)
Generally, as the ion exchange capacity (IEC) increases, the ion conductivity of the polymer alkaline membrane increases, but a higher IEC value often leads to a sharp increase in membrane hydrophilicity, high swelling rate, and rapid mechanical properties. drop problem, which brings limitations to its application

Method used

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  • Heterocycle polymer alkaline anion-exchange membrane and method for producing same
  • Heterocycle polymer alkaline anion-exchange membrane and method for producing same
  • Heterocycle polymer alkaline anion-exchange membrane and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Dissolve 100g of polyetheretherketone (PEEK) in 650ml of concentrated sulfuric acid, add dropwise 20ml of chloromethyl octyl ether after dissolving, and stir at room temperature for 3 hours. After the reaction, pour the reactant into the ice-water mixture to precipitate the product. The product was washed with water until neutral, filtered, and dried to obtain chloromethylated polyetheretherketone (CMPEEK). Weigh 10g of CMPEEK and dissolve it in 6.5ml of N,N-dimethylformamide (DMF), add 0.20g of pyrazole, stir and react for 10min to obtain a casting solution. Membranes were prepared by solution casting, dried in an oven at 60°C, then soaked in 1mol / L KOH solution for 24 hours, taken out, and fully rinsed with deionized water to obtain basic anion exchange membranes.

[0073] In this embodiment, such as using phthalazinone biphenyl polyether ketone, polyether sulfone, polyether sulfone ketone, polyether ketone ketone, polyether nitrile ketone, polyether nitrile sulfone k...

Embodiment 2

[0075]Dissolve 100g of phthalazinone biphenyl polyether ketone ketone (PPEKK) in 800ml of concentrated sulfuric acid, add dropwise 20ml of chloromethyl butyl ether after dissolving, stir and react at 45°C for 3h, and pour the reactant into ice-water mixture after the reaction , the product precipitated out. The product was washed with water until neutral, filtered and dried to obtain chloromethylated naphthalene polyether ketone ketone (CMPPEKK). Weigh 10g of CMPPEKK and dissolve it in 6ml of N,N-dimethylformamide, add 0.20g of 1-methylimidazole, stir and react for 10min to obtain a casting solution. Membranes were prepared by solution casting, dried in an oven at 60°C, then soaked in 1mol / L KOH solution for 24 hours, taken out, and fully rinsed with deionized water to obtain basic anion exchange membranes.

[0076] In this embodiment, such as using phthalazinone biphenyl polyether ketone, polyether sulfone, polyether sulfone ketone, polyether nitrile ketone, polyether nitril...

Embodiment 3

[0078] Dissolve 100g of polysulfone (PSF) in 800ml of concentrated sulfuric acid, add 20ml of chloromethyl butyl ether dropwise after dissolving, stir at room temperature for 3h, and pour the reactant into ice-water mixture after the reaction to precipitate the product. The product was washed with water until neutral, filtered, and dried to obtain chloromethylated polysulfone (CMPSF). Weigh 10g of CMPSF and dissolve it in 8ml of N,N-dimethylacetamide, add 0.20g of imidazole, stir and react for 10min to obtain a casting solution. The film was prepared by solution casting method, adding 0.10g React for 1 hour, dry in an oven at 60°C, then soak the membrane in 1mol / L KOH solution for 24 hours, take it out, and rinse it with deionized water to obtain a basic anion exchange membrane.

[0079] In this embodiment, such as using phthalazinone biphenyl polyether ketone, polyether sulfone, polyether sulfone ketone, polyether ketone ketone, polyether nitrile ketone, polyether nitrile s...

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Abstract

The invention discloses a heterocycle polyarylether alkaline anion-exchange membrane and a method for producing the same, which are characterized in that: the side group of polymer is provided with a heterocycle quaternary ammonium ion group. The method for producing the heterocycle polyarylether alkaline anion-exchange membrane is as follows: polyarylether is taken as an original raw material, and sequentially undergoes active halogenation reaction, quaternization reaction, membrane production, quaternization reaction, alkali ion exchange and other steps, so the heterocycle polyarylether alkaline anion-exchange membrane is obtained after the washing. The invention has the beneficial effects that: the produced alkaline anion-exchange membrane has prominent mechanical property and high-temperature stability, good chemical stability, higher ionic conductance and a simple technology, is low in cost, and is widely used in fuel cells, secondary energy storage batteries, alkaline industries, electrolytic films and other related electrochemical devices as well as other function membranes.

Description

technical field [0001] The invention belongs to the technical field of polymer ion exchange membranes, and relates to a heterocyclic polymer basic anion exchange membrane and a preparation method thereof. Background technique [0002] It is used in various electrochemical devices including alkaline fuel cells, direct methanol fuel cells, secondary energy storage batteries, industrial diaphragms for alkali production, electrolytic diaphragms, water treatment, other separation diaphragms or functional membranes for other electrochemical devices. To the polymer basic anion exchange membrane, on the one hand, it acts as a diaphragm, and at the same time, it has the function of conducting anions. At present, the commercial polymer alkaline anion exchange membrane is mainly prepared by ionization based on cross-linked polystyrene. In a strong alkaline medium, it can only be used at a relatively low temperature, and its mechanical and chemical stability is limited, so it is in urge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/82B01D71/52B01D67/00B01D69/02B01J41/12B01J41/13H01M8/1027H01M8/1072
CPCY02E60/12Y02E60/50Y02P70/50
Inventor 朱秀玲王光阜刘陟钱灌文刘德治
Owner DALIAN UNIV OF TECH
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