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Phenolphthalein-based anion exchange membrane containing comb-shaped side chains and preparation method thereof

An anion-exchange membrane, phenolphthalein-based technology, applied in the field of alkaline fuel cells, to overcome high ionic conductivity, enhance water retention capacity and anti-swelling performance, and high water content

Inactive Publication Date: 2020-11-03
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These lead to great challenges for anion exchang

Method used

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  • Phenolphthalein-based anion exchange membrane containing comb-shaped side chains and preparation method thereof
  • Phenolphthalein-based anion exchange membrane containing comb-shaped side chains and preparation method thereof
  • Phenolphthalein-based anion exchange membrane containing comb-shaped side chains and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] In this embodiment, the long carbon chain comb-shaped phenolphthalein-based polyarylethersulfone nitrile anion exchange membrane containing 10 carbon atoms (the proportion of sulfone segments is 40%) is taken as an example, and the structural formula is as follows:

[0046]

[0047] where R is H or Concrete preparation method comprises the following steps:

[0048] 1) Polymer synthesis: 1.149g 4,4'-dichlorodiphenylsulfone (4mmol), 1.032g 3,5-dichlorobenzonitrile (6mmol), 3.465g o-cresolphthalein (10mmol), 3.784g (27.4 mmol) of anhydrous potassium carbonate and 10 mL of toluene were dissolved in 30 mL of N,N-dimethylacetamide, protected by nitrogen, and reacted at 145°C for 4 hours, then heated to 170°C for 20 hours, and cooled with 400mL of aqueous methanol (methanol and water) The volume ratio is 1:1) to precipitate, filter, wash, and dry to obtain a phenolphthalein-based polymer.

[0049] 2) Synthesis of bromomethylated polymer: Dissolve 1 g (2.04 mmol) of pheno...

Embodiment 2

[0053] In this embodiment, the long carbon chain comb-shaped phenolphthalein-based polyarylether ketone nitrile anion exchange membrane containing 10 carbon atoms (the ratio of the ketone segment is 20%) is taken as an example, and the structural formula is as follows:

[0054]

[0055] where R is H or Concrete preparation method comprises the following steps:

[0056] 1) Synthesis of phenolphthalein-based polyarylether ketone nitrile polymer: 3,5-dichlorobenzonitrile (8mmol, 1.376g), o-cresolphthalein (10mmol, 3.465g), 4,4'-dichlorobenzophenone (2mmol, 0.5024g), 3.932g (28.4mmol) anhydrous potassium carbonate, and 10mL toluene, dissolved in 30mL polar aprotic solvent N,N-dimethylformamide, under nitrogen protection, reacted at 145°C for 4h, Then heat up to 170°C to react for 20h, and after cooling, precipitate with 400mL methanol aqueous solution (the volume ratio of methanol to water is 1:1), filter, wash, and dry to obtain polyaryletherketonenitrile polymer.

[0057] ...

Embodiment 3

[0061] In this embodiment, the long carbon chain comb-shaped phenolphthalein-based polyarylether ketone nitrile anion exchange membrane containing 12 carbon atoms (the ratio of the ketone segment is 40%) is taken as an example, and the structural formula is as follows:

[0062]

[0063] where R is H or Concrete preparation method comprises the following steps:

[0064] 1) Synthesis of phenolphthalein-based polymers: 4,4'-dichlorobenzophenone (4mmol, 1.004g), 3,5-dichlorobenzonitrile (6mmol, 1.032g), o-cresolphthalein (10mmol, 3.465g ), 3.452g (25mmol) of anhydrous potassium carbonate and 10mL of toluene were dissolved in 30mL of N,N-dimethylacetamide, protected by nitrogen, and reacted at 145°C for 4h, and then heated to 170°C for 20h, cooled and washed with 400mL of methanol The aqueous solution (the volume ratio of methanol to water is 1:1) is precipitated, filtered, washed and dried to obtain polyaryletherketonenitrile polymer.

[0065] 2) Synthesis of bromomethylated...

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Abstract

The invention discloses a phenolphthalein-based anion exchange membrane containing comb-shaped side chains and a preparation method thereof. The phenolphthalein-based anion exchange membrane can be used for alkaline fuel cells. The anion exchange membrane is made of a phenolphthalein-based polyarylether polymer containing comb-shaped side chains, and is characterized in that an imidazole ion groupcontaining flexible long carbon chains is grafted on a phenolphthalein structural unit. The preparation method mainly comprises the following steps: (1) synthesizing a phenolphthalein-based polyarylether polymer; (2) conducting bromination modification of the polymer; and (3) preparing the phenolphthalein-based anion exchange membrane containing comb-shaped side chains. The anion exchange membrane prepared by the method has a developed ion transmission channel, has the characteristics of high water content and low swelling rate, and overcomes the defect that an existing anion exchange membrane cannot have high water content, high conductivity and low swelling rate at the same time. A highly toxic carcinogenic chloromethyl ether reagent is not used in the preparation process, so that the preparation method has a wide application prospect in the field of alkaline fuel cells.

Description

technical field [0001] The invention belongs to the field of alkaline fuel cells, and in particular relates to an anion exchange membrane and a synthesis method thereof. Background technique [0002] Fuel Cell is a power generation device that uses chemical reaction technology to directly and efficiently convert the chemical energy stored in fuel and oxidant into electrical energy. It is regarded as the fourth generation power generation technology. As a clean and efficient renewable energy conversion device, fuel cells have attracted extensive attention in the past decade due to their high efficiency, high energy density, environmental friendliness, and portability. Among various types of fuel cells, alkaline anion exchange membrane fuel cells (AEMFCs) have attracted special attention because of their fast redox reaction and the potential of using non-precious metal catalysts, and have become a research hotspot in the field of fuel cells. . Among them, anion exchange memb...

Claims

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Application Information

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IPC IPC(8): C08J5/22C08G75/23C08G65/48C08G65/40H01M8/083H01M8/1032H01M8/1069
CPCC08J5/2256C08G75/23C08G65/405C08G65/485H01M8/1032H01M8/1069H01M8/083C08J2381/06C08J2371/12Y02E60/50Y02P70/50
Inventor 赖傲楠王贞胡鹏程周树锋
Owner HUAQIAO UNIVERSITY
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