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Fluorenyl anion-exchange membrane containing comb-shaped side chains and preparation method of fluorenyl anion-exchange membrane

A technology of ion exchange membrane and fluorenyl anion, which is applied in the field of anion exchange membrane and its synthesis, can solve the complex synthesis of polycation quaternization reagents and other problems, and achieve real and controllable membrane structure and performance, low conductivity, and enhanced water retention Ability and effect of anti-swelling properties

Inactive Publication Date: 2020-11-13
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis of polycationic quaternization reagents is complex and faces great challenges in practical industrial applications.

Method used

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  • Fluorenyl anion-exchange membrane containing comb-shaped side chains and preparation method of fluorenyl anion-exchange membrane
  • Fluorenyl anion-exchange membrane containing comb-shaped side chains and preparation method of fluorenyl anion-exchange membrane
  • Fluorenyl anion-exchange membrane containing comb-shaped side chains and preparation method of fluorenyl anion-exchange membrane

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Embodiment 1

[0046]In this embodiment, the comb-shaped fluorenyl polyaryl ether sulfone nitrile anion exchange membrane containing 8 carbon atoms and long carbon chains (the proportion of sulfone segments is 60%) is taken as an example, and the structural formula is as follows:

[0047]

[0048] where R is H or Concrete preparation method comprises the following steps:

[0049] 1) Synthesis of fluorenyl polymer: 1.723g 4,4'-dichlorodiphenylsulfone (6mmol), 0.688g 3,5-dichlorobenzonitrile (4mmol), 3.785g 9,9-bis(3-methyl Dimethyl-4-hydroxyphenyl) fluorene (10mmol), 3.455g (25mmol) anhydrous potassium carbonate and 10mL toluene were dissolved in 25mL N,N-dimethylacetamide, under nitrogen protection, reacted at 145°C for 4h, then raised the temperature Reaction at 165°C for 20h, after cooling, precipitate with 500mL methanol aqueous solution (the volume ratio of methanol to water is 1:1), filter, wash and dry to obtain the fluorenyl polymer.

[0050] 2) Synthesis of bromomethylated poly...

Embodiment 2

[0055] In this embodiment, the comb-shaped fluorenyl polyarylether ketone nitrile anion exchange membrane containing 8 carbon atoms and long carbon chains (the ratio of the ketone segment is 20%) is taken as an example, and the structural formula is as follows:

[0056]

[0057] where R is H or Concrete preparation method comprises the following steps:

[0058] 1) Synthesis of fluorenyl polyarylether ketone nitrile polymer: 0.504g 4,4'-dichlorobenzophenone (2mmol), 1.376g 3,5-dichlorobenzonitrile (8mmol), 3.785g 9,9- Bis(3-methyl-4-hydroxyphenyl)fluorene (10mmol), 3.732g (27mmol) anhydrous potassium carbonate, 25mL polar aprotic solvent N,N-dimethylformamide, nitrogen protection, prior to 145 ℃ for 4 hours, and then heated to 165 ℃ for 20 hours, after cooling, precipitated with 500mL methanol aqueous solution (the volume ratio of methanol to water was 1:1), filtered, washed and dried to obtain polyaryletherketonenitrile polymer.

[0059] 2) Synthesis of bromomethylated p...

Embodiment 3

[0063] In this embodiment, the anion-exchange membrane of fluorenyl polyarylether ketone nitrile containing 10 carbon atoms and long carbon chain comb-shaped fluorenyl polyarylether ketone nitrile (the proportion of ketone segment is 40%) is taken as an example, and the structural formula is as follows:

[0064]

[0065] where R is H or Concrete preparation method comprises the following steps:

[0066] 1) Synthesis of polyaryl ether ketone nitrile polymer: 1.002g 4,4'-dichlorobenzophenone (4mmol), 1.032g 3,5-dichlorobenzonitrile (6mmol), 3.785g 9,9-di (3-Methyl-4-hydroxyphenyl)fluorene (10mmol), 3.814g (27.6mmol) anhydrous potassium carbonate and 10mL toluene were dissolved in 25mL N,N-dimethylacetamide, nitrogen protection, first at 145°C React for 4 hours, then raise the temperature to 170°C and react for 20 hours. After cooling, precipitate with 500 mL methanol aqueous solution (the volume ratio of methanol to water is 1:1), filter, wash, and dry to obtain polyaryleth...

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Abstract

The invention discloses a fluorenyl anion-exchange membrane containing comb-shaped side chains and a preparation method of the fluorenyl anion-exchange membrane, which can be used for alkaline fuel cells. The anion-exchange membrane is made of a fluorenyl polyarylether polymer containing comb-shaped side chains, and is characterized in that quaternary ammonium ion groups containing flexible long carbon chains are grafted on units of the fluorenyl structure. The preparation method mainly comprises the steps of (1) synthesizing a fluorenyl-containing polyarylether polymer; (2) carrying out bromination modification of the polymer; and (3) preparing the fluorenyl anion-exchange membrane containing the 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, overcomes the defect that the existing anion-exchange membrane cannot have high water content, high conductivity and low swelling rate at the same time, and has good stability in alkaline stability. In addition, a highly toxic carcinogenic chloromethyl ether reagent is not used in the preparation process,so that the anion-exchange membrane 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 electrolyte 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 membranes ...

Claims

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Application Information

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IPC IPC(8): H01M8/1027H01M8/1072H01M8/1081C08G75/23B01J41/13
CPCH01M8/1027H01M8/1072H01M8/1081B01J41/13C08G75/23Y02E60/50
Inventor 赖傲楠王贞江伟周树锋
Owner HUAQIAO UNIVERSITY
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