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A kind of polyfunctionalized cross-linked polyarylene butanedione anion exchange membrane and preparation method thereof

A technology of polyarylene butanedione and anion exchange membrane, which is applied in electrochemical generators, fuel cells, electrical components, etc., and can solve problems such as attack, membrane mechanical properties and electrical conductivity decline

Active Publication Date: 2021-07-06
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently commonly used polymers such as polysulfone and polyether ether ketone are susceptible to attack by hydroxyl radicals in alkaline environment, leading to degradation of the main chain, resulting in a decrease in the mechanical properties and electrical conductivity of the membrane.

Method used

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  • A kind of polyfunctionalized cross-linked polyarylene butanedione anion exchange membrane and preparation method thereof
  • A kind of polyfunctionalized cross-linked polyarylene butanedione anion exchange membrane and preparation method thereof
  • A kind of polyfunctionalized cross-linked polyarylene butanedione anion exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Synthesis of dibromo-substituted polyarylene butanedione: Add 4.024g (16.5mmol) of 1,4-dibromo-2,3-butanedione and 2.313g (15mmol) of biphenyl into a 50mL single-necked flask, Add 22.5mL of dichloromethane and 5.3mL of trifluoromethanesulfonic acid, react at 0°C for 6h. After the reaction is completed, the product is slowly poured into methanol under stirring, and a filamentous polymer product is precipitated. The product is repeatedly washed and soaked with methanol, and then dried to obtain a polymer. Dissolve the polymer with N-methylpyrrolidone into a solution of a certain concentration. After the solution is completely dissolved, pour the solution into methanol to precipitate the polymer. After repeated washing several times, dry it in a vacuum oven for 6 hours at room temperature to obtain a polymer product.

[0031] Synthesis of combined polyarylene butanedione anion exchange membrane: Dissolve 0.16 g of dibromosubstituted polyarylene butanedione in 4.4 mL of N-m...

Embodiment 2

[0037] Synthesis of dibromo-substituted polyarylene butanedione: Add 4.024g (16.5mmol) of 1,4-dibromo-2,3-butanedione and 2.313g (15mmol) of biphenyl into a 50mL single-necked flask, Add 22.5mL of dichloromethane and 5.3mL of trifluoromethanesulfonic acid, react at 0°C for 6h. After the reaction is completed, the product is slowly poured into methanol under stirring, and a filamentous polymer product is precipitated. The product is repeatedly washed and soaked with methanol, and then dried to obtain a polymer. Dissolve the polymer with N-methylpyrrolidone into a solution of a certain concentration. After the solution is completely dissolved, pour the solution into methanol to precipitate the polymer. After repeated washing several times, dry it in a vacuum oven for 6 hours at room temperature to obtain a polymer product.

[0038] Synthesis of combined polyarylene butanedione anion exchange membrane: Dissolve 0.16 g of dibromosubstituted polyarylene butanedione in 4.4 mL of N-m...

Embodiment 3

[0044] Synthesis of dibromosubstituted polyarylene butanedione: same as Example 2

[0045]Synthesis of combined polyarylene butanedione anion exchange membrane: Dissolve 0.16 g of dibromosubstituted polyarylene butanedione in 4.4 mL of N-methylpyrrolidone in a 25 mL one-necked flask, add 4.4 μL of N,N, N',N'-tetramethyl-1,6-hexanediamine, stirred for 30 minutes, centrifuged the casting solution and cast it in a glass mold, dried at 30°C for 24 hours, and then heated to 60°C for 24 hours to obtain a polymer film .

[0046] Preparation of multifunctional cross-linked polyarylene butanedione anion exchange membrane: Soak the joint polyarylene butanedione anion exchange membrane in 10% N-methylpiperidine aqueous solution at 80°C for 48h, Then soak in deionized water for 24 hours, then soak in 1mol / L KOH solution at room temperature for 48 hours, then repeatedly wash with deionized water and soak for 48 hours until neutral, then the multi-functional cross-linked polyarylene Diace...

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Abstract

The invention discloses a multifunctional cross-linked polyarylene butanedione anion exchange membrane and a preparation method thereof, belonging to the technical field of alkaline anion exchange membranes. The present invention first synthesizes a dibromo-substituted polyarylene butanedione polymer with good alkali resistance stability, then directly uses the bromine of the polymer as the functionalization site to thermally crosslink the polymer, and then converts the remaining site Perform quaternization to obtain membrane material. The prepared membrane has good alkali stability, dimensional stability and high ion conductivity, and can be applied in alkaline fuel cells.

Description

technical field [0001] The invention belongs to the technical field of basic anion exchange membranes, and relates to a multifunctional crosslinked polyarylene butanedione anion exchange membrane and a preparation method thereof. Background technique [0002] With the rapid economic growth and rapid population expansion, the demand for energy in modern society is increasing day by day, and traditional fossil fuels are non-renewable. Under this background, clean and efficient energy conversion devices have become a major global problem that needs to be solved urgently. topic. As a high-efficiency electrochemical device, fuel cells can directly convert chemical energy into electrical energy, and are not limited by the thermomechanical Carnot cycle mechanism. Compared with the use of traditional fossil energy, fuel cells have higher utilization efficiency. At the same time, the fuel cell also has the advantage of zero pollutant discharge, that is, only water or carbon dioxide ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G61/02
CPCC08G61/02C08J5/2256C08J5/2287H01M8/103H01M8/1088Y02E60/50
Inventor 焉晓明马思瑜贺高红代岩郑文姬阮雪华高莉胡磊朱奔
Owner DALIAN UNIV OF TECH
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