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Preparation method of Schiff base crown ether polymer and application of Schiff base crown ether polymer in anion exchange membrane

A Schiff base crown ether and polymer technology, which is used in the synthesis of Schiff base crown ether polymers and the application field of modified polysulfone anion exchange membranes, can solve the problem of poor stability, restricting the development of AEMFC, and low ionic conductivity. and other problems, to achieve the effect of low cost, good application prospects and high conductivity

Active Publication Date: 2022-07-05
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are still two key problems of low ion conductivity and poor stability, which restrict the development of AEMFC.

Method used

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  • Preparation method of Schiff base crown ether polymer and application of Schiff base crown ether polymer in anion exchange membrane
  • Preparation method of Schiff base crown ether polymer and application of Schiff base crown ether polymer in anion exchange membrane
  • Preparation method of Schiff base crown ether polymer and application of Schiff base crown ether polymer in anion exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation method of Schiff base crown ether polymer is implemented according to the following steps:

[0035] (1) Weigh 2.016g of dibenzo-18-crown-6 and 3.22g of hexamethylenetetramine into a three-necked flask, add 8.3mL of trifluoroacetic acid, react at 90°C for 12h, cool at room temperature, use benzene Washing gave a brown oily liquid, which was dried over magnesium sulfate to give dialdehyde dibenzo-18-crown-6 (CHOCE).

[0036] (2) Weigh 5.0g of dibenzo-18-crown-6 into a three-necked flask, add 100mL of dichloromethane and 75mL of glacial acetic acid, and slowly dropwise add a mixed acid solution of 10mL of glacial acetic acid and 3.5mL of concentrated nitric acid at 50°C, The reaction was carried out for 5 hours, and a large amount of white solid appeared after cooling to room temperature. After filtration, it was washed with ethanol and deionized water, and dried under vacuum at 70 °C for 12 hours to obtain dinitrodibenzo-18-crown-6 (NO 2 CE); then take by...

Embodiment 2

[0040] The preparation method of Schiff base crown ether polymer is implemented according to the following steps:

[0041](1) Weigh 2.016g of dibenzo-18-crown-6 and 3.22g of hexamethylenetetramine into a three-necked flask, add 8.3mL of trifluoroacetic acid, react at 90°C for 12h, cool at room temperature, use benzene Washing gave a brown oily liquid, which was dried over magnesium sulfate to give dialdehyde dibenzo-18-crown-6 (CHOCE).

[0042] (2) Weigh 5.0g of dibenzo-18-crown-6 into a three-necked flask, add 100mL of dichloromethane and 75mL of glacial acetic acid, and slowly dropwise add a mixed acid solution of 10mL of glacial acetic acid and 3.5mL of concentrated nitric acid at 50°C, The reaction was carried out for 5 hours, and a large amount of white solid appeared after cooling to room temperature. After filtration, it was washed with ethanol and deionized water, and dried under vacuum at 70 °C for 12 hours to obtain dinitrodibenzo-18-crown-6 (NO 2 CE); then take by ...

Embodiment 3

[0046] The preparation method of Schiff base crown ether polymer is implemented according to the following steps:

[0047] (1) Weigh 2.016g of dibenzo-18-crown-6 and 3.22g of hexamethylenetetramine into a three-necked flask, add 8.3mL of trifluoroacetic acid, react at 90°C for 12h, cool at room temperature, use benzene Washing gave a brown oily liquid, which was dried over magnesium sulfate to give dialdehyde dibenzo-18-crown-6 (CHOCE).

[0048] (2) Weigh 5.0g of dibenzo-18-crown-6 into a three-necked flask, add 100mL of dichloromethane and 75mL of glacial acetic acid, and slowly dropwise add a mixed acid solution of 10mL of glacial acetic acid and 3.5mL of concentrated nitric acid at 50°C, The reaction was carried out for 5 hours, and a large amount of white solid appeared after cooling to room temperature. After filtration, it was washed with ethanol and deionized water, and dried under vacuum at 70 °C for 12 hours to obtain dinitrodibenzo-18-crown-6 (NO 2 CE); then take by...

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Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to a preparation method of a Schiff base crown ether polymer and application of the Schiff base crown ether polymer in a modified polysulfone anion exchange membrane for a fuel cell. The preparation method comprises the following specific steps: adding trifluoroacetic acid into dibenzo-18-crown-6 and hexamethylenetetramine, so as to obtain dialdehyde dibenzo-18-crown-6; the preparation method comprises the following steps: adding dichloromethane and glacial acetic acid into dibenzo-18-crown-6, and dropwise adding a mixed acid solution of glacial acetic acid and concentrated nitric acid to obtain dinitrodibenzo-18-crown-6; the preparation method comprises the following steps: adding ethanol and an aqueous solution into dinitrodibenzo-18-crown-6 and sodium hydroxide, and then adding thiourea dioxide to obtain diaminodibenzo-18-crown-6; the preparation method comprises the following steps: dissolving dialdehyde dibenzene-18-crown-6 and diaminodibenzene-18-crown-6 into dichloromethane, so as to obtain a target product. The anion exchange membrane prepared by the invention has good alkali-resistant stability and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, relates to a membrane electrolyte preparation technology for anion exchange membrane fuel cells, and in particular relates to the synthesis of a Schiff base crown ether polymer and its application in a modified polysulfone anion exchange membrane for fuel cells. Background technique [0002] Today's world is facing two major problems of energy shortage and environmental pollution. Therefore, the development of green and efficient new energy is an inevitable trend of social development. Fuel cells are considered to be one of the most promising environmentally friendly energy production technologies, with the advantages of high energy conversion rate and low environmental pollution. Fuel cells are divided into proton exchange membrane fuel cells and alkaline anion exchange membrane fuel cells. Compared with proton exchange membrane fuel cells, alkaline anion exchange membrane fuel cells have fas...

Claims

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Application Information

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IPC IPC(8): C08G12/26C08J5/22C08L81/06C08L61/26H01M8/1081H01M8/1086H01M8/1044
CPCC08G12/26C08J5/2256C08J5/2287H01M8/1081H01M8/1086H01M8/1044C08J2381/06C08J2461/26Y02E60/50
Inventor 王吉林王璐璐徐亚宁
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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