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A blended anion exchange membrane and a preparation method thereof

An anion exchange membrane, blending technology, used in final product manufacturing, sustainable manufacturing/processing, fuel cells, etc., can solve problems such as unsystematic water absorption, and achieve good chemical stability and high electrical conductivity. , the effect of high dimensional stability

Active Publication Date: 2019-04-05
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The anion exchange membrane prepared by bromination and heterogeneous quaternization of PIM-1 with methyl groups on the structural unit has a hydroxide ion conductivity of 65mS cm at 80°C -1 [umitaka Ishiwari.et.al, J.Mater.Chem.A, 2016, 4, 17655–17659] but did not systematically give key data such as water absorption, swelling rate, and IEC

Method used

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  • A blended anion exchange membrane and a preparation method thereof
  • A blended anion exchange membrane and a preparation method thereof
  • A blended anion exchange membrane and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 8.4 g of 1,2-dihydroxy-3-methylbenzene were dissolved in 18 ml of aqueous hydrobromic acid and 16.5 ml of acetic acid solution to obtain a clear slightly yellowish solution. 10.5ml of acetone was added dropwise to the mixture, and the obtained transparent solution was heated to 110°C and magnetically stirred and refluxed for 36 hours. After the reaction was completed, the mixture was slowly poured into 500ml of deionized water, washed and filtered, and vacuum-dried at 30°C for 24 hours to obtain a black color. solid. Put the black solid in 200ml of acetic acid, stir and wash it for 3 hours, filter it with suction, and dry it under vacuum at 30°C for 24 hours to obtain a white solid which is the product 5,5',6,6'-tetrahydroxy-3,3,3',3', 7,7'-Hexamethyl-helical bisindane (THSBI).

[0047] Weigh 5.425g of THSBI and dissolve it in 67.5ml of anhydrous N,N-dimethylformamide (DMF) to obtain a yellow transparent solution, and add 18g of tert-butyldimethylsilyl chloride. The m...

Embodiment 2

[0055] 16.8 g of 1,2-dihydroxy-3-methylbenzene was dissolved in 36 ml of aqueous hydrobromic acid and 33 ml of acetic acid solution to obtain a clear slightly yellowish solution. 21ml of acetone was added dropwise to the mixed solution, and the obtained transparent solution was heated to 120°C and magnetically stirred and refluxed for 24 hours. After the reaction was completed, the mixed solution was slowly poured into 500ml of deionized water while hot, washed three times, suction filtered, and vacuum-dried at 50°C for 24 hours to obtain black solid. Put the black solid in 200ml of acetic acid, stir and wash it for 3 hours, filter it with suction, and dry it under vacuum at 50°C for 24 hours to obtain a white solid which is the product 5,5',6,6'-tetrahydroxy-3,3,3',3', 7,7'-Hexamethyl-helical bisindane (THSBI).

[0056] Weigh 10.85g of THSBI and dissolve it in 135ml of anhydrous N,N-dimethylformamide (DMF) to obtain a yellow transparent solution, and add 36g of tert-butyldim...

Embodiment 3

[0065] 13.44 g of 1,2-dihydroxy-3-methylbenzene were dissolved in 28.8 ml of aqueous hydrobromic acid and 26.4 ml of acetic acid solution to obtain a clear slightly yellowish solution. 16.8ml of acetone was added dropwise to the mixture, and the obtained transparent solution was heated to 130°C and magnetically stirred and refluxed for 15 hours. After the reaction was completed, the mixture was slowly poured into 500ml of deionized water while it was still hot, washed and filtered, and vacuum-dried at 80°C for 36 hours to obtain a black color. solid. Put the black solid in 200ml of acetic acid, stir and wash it for 3 hours, filter it with suction, and dry it under vacuum at 80°C for 36 hours to obtain a white solid which is the product 5,5',6,6'-tetrahydroxy-3,3,3',3', 7,7'-Hexamethyl-helical bisindane (THSBI).

[0066] Weigh 8.68g of THSBI and dissolve it in 108ml of anhydrous N,N-dimethylformamide (DMF) to obtain a yellow transparent solution, and add 28.8g of tert-butyldim...

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Abstract

A blended anion exchange membrane and a preparation method thereof belong to the field of fuel cell solid electrolyte membranes. The membrane material regards chloromethylated polysulfone as a polymerbase, bromomethylated PIM-1 as a blended component, and N-methylmorpholine as an ionic group. The two polymers are simultaneously subjected to a quaternization process to prepare a novel blended anion exchange membrane. The membrane blended with BrPIM has lower IEC and higher hydroxide ion conductivity and better dimensional stability than pure MmPSF membranes. In the present invention, the strong interaction force in the cyano-cyano and cyano-morpholine formed by the presence of cyano groups in the PIM polymer unit are used to maintain good dimensional stability of the membrane; and PIM rigid twisted main chains are used to construct micropores in the membrane to increase conductivity. The anion membrane prepared by the invention has the characteristics of controllability, relatively high alkali resistance stability, dimensional stability and electrical conductivity, and is important for exploring the influence of the free volume in the membrane on the electrical conductivity.

Description

technical field [0001] The invention belongs to the field of fuel cell solid electrolyte membranes, and specifically designs a blended anion exchange membrane and a preparation method thereof. Background technique [0002] Facing the problems of environmental pollution and energy shortage in the 21st century, fuel cells are considered to be the most promising clean, efficient and sustainable future power generation technology. Traditional fuel cells use potassium hydroxide solution as the electrolyte, and there is a problem of carbonate precipitation and crystallization. Hydroxide ions in the electrolyte react with carbon dioxide in the air to form carbonate precipitates that block the electrode pores and affect gas diffusion. And it will reduce the concentration of hydroxide ions in the electrolyte, which will affect the performance of the battery. In order to solve these problems caused by the electrolyte, the development of solid electrolyte ion exchange membranes has b...

Claims

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Application Information

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IPC IPC(8): H01M8/1044H01M8/1039H01M8/1069H01M8/1088
CPCH01M8/1039H01M8/1044H01M8/1069H01M8/1088H01M2008/1095Y02E60/50Y02P70/50
Inventor 张凤祥巩守涛李旅马玲玲李攀月阿克塔
Owner DALIAN UNIV OF TECH
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