A kind of hydrophilic long side chain alkaline anion exchange membrane and preparation method thereof

A basic anion and exchange membrane technology, which is applied in electrochemical generators, fuel cells, electrical components, etc., can solve the problems of no membrane material reports, and achieve the effect of cheap and abundant raw materials, good application prospects, and simple operation

Active Publication Date: 2020-01-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current development is mainly through the development of polymer backbone structures, such as block structure backbone (CN105906812A, CN106883327A, CN104530723A), semi-interpenetrating network structure backbone (CN106887629A, CN104941468A,) or long alkyl chain large Sterically hindered ion-conducting groups (J.Am.Chem.Soc.,2013,135,10124-10133), however, there is no research work on hydrophilic modification of ion-conducting groups, and there is no such membrane material report

Method used

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  • A kind of hydrophilic long side chain alkaline anion exchange membrane and preparation method thereof
  • A kind of hydrophilic long side chain alkaline anion exchange membrane and preparation method thereof
  • A kind of hydrophilic long side chain alkaline anion exchange membrane and preparation method thereof

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Effect test

Embodiment 1

[0035]Preparation of Im-2C-MEG: Under the protection of nitrogen, dissolve 20mmol sodium hydride in 40mL tetrahydrofuran, stir well, add 20mmol ethylene glycol monomethyl ether, react for 2 hours, add 60mmol 1,2-dibromoethyl to the above solution in alkanes, fully stirred, and reacted at 60°C for 8 hours; then the reaction solution was suction filtered, washed with water, and the aqueous phase was extracted three times with chloroform, the organic phases were combined, dried with anhydrous magnesium sulfate, concentrated by rotary evaporation, and refined by distillation under reduced pressure (46°C / 0.5mmHg) to obtain a colorless transparent liquid bromide. Under the protection of nitrogen, 10mmol 2-methylimidazole and 12mmol sodium hydride were fully reacted in 40mL tetrahydrofuran solution. After 1h, the bromide was added to the above reaction solution, and reacted at room temperature for 24h. Methane / methanol=20 / 1 was used as column chromatography developing solvent, and c...

Embodiment 2

[0039] Preparation of Im-2C-DEG: Under the protection of nitrogen, dissolve 20mmol sodium hydride in 40mL toluene, stir well, add 20mmol diethylene glycol monomethyl ether, react for 4 hours, add 80mmol 1,2-dibromo in ethane, fully stirred, and reacted at 80°C for 10 h; then the reaction solution was suction filtered, washed with water, and the aqueous phase was extracted 3 times with chloroform, and the organic phase was combined, dried with anhydrous magnesium sulfate, concentrated by rotary evaporation, and refined by distillation under reduced pressure (80 ℃ / 0.5mmHg), a colorless and transparent liquid bromide was obtained. Under the protection of nitrogen, 10mmol 2-methylimidazole and 12mmol sodium hydride were fully reacted in 40mL toluene solution. After 1h, the bromide was added to the above reaction solution, and reacted at room temperature for 24h. Methane / methanol=40 / 1 was used as column chromatography developing solvent, and column chromatography separation and pur...

Embodiment 3

[0043] Preparation of Im-2C-TEG: Under the protection of nitrogen, dissolve 20mmol sodium hydride in 40mL cyclohexane, stir well, add 20mmol triethylene glycol monomethyl ether, and react for 6 hours, add 100mmol 1,2-bis In bromoethane, fully stirred, reacted at 100°C for 16h; then the reaction solution was suction filtered, washed with water, and the aqueous phase was extracted 3 times with chloroform, the organic phase was combined, dried with anhydrous magnesium sulfate, concentrated by rotary evaporation, and refined by vacuum distillation ( 104°C / 0.5mmHg), a colorless transparent liquid bromide was obtained. Under the protection of nitrogen, 10mmol 2-methylimidazole and 12mmol sodium hydride were fully reacted in 40mL cyclohexane solution. After 1h, the bromide was added to the above reaction solution, and reacted at room temperature for 24h. After suction filtration and concentration, use Dichloromethane / methanol=60 / 1 was used as column chromatography developing solvent,...

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Abstract

The invention provides a hydrophilic long-side chain alkali negative ion exchange membrane and a preparation method thereof, and belongs to the technical field of a negative ion exchange membrane. Thepreparation method of the hydrophilic long-side chain alkali negative ion exchange membrane comprises the steps of firstly, synthesizing bromide; and secondly, synthesizing a long-side chain-containing imidazole compound by the bromide, introducing the group into a main chain material, and preparing a target film material by film formation. By building hydrophilic / hydrophobic micro-phase separation, a better ion passage is formed, the hydroxyl conductivity of the membrane is improved, and the hydrophilic long-side chain alkali negative ion exchange membrane has good application prospect. Moreover, the process of preparing the alkali negative ion exchange membrane has the advantages of greenness, no pollution and cheap and rich raw material and is simple to operate.

Description

technical field [0001] The invention relates to a hydrophilic long side chain basic anion exchange membrane and a preparation method thereof, belonging to the technical field of anion exchange membranes. Background technique [0002] As the situation of environmental pollution and resource shortage continues to worsen, clean energy or renewable energy has become a hot spot of human concern. Polymer electrolyte membrane fuel cells can directly convert chemical energy into electrical energy and are regarded as an important clean energy technology. Polymer electrolyte membrane fuel cells include proton exchange membrane fuel cells and anion exchange membrane fuel cells. Proton exchange membrane fuel cell has become one of the most mature fuel cells because of its high energy conversion rate. Compared with proton exchange membrane fuel cells, anion exchange membrane fuel cells have developed rapidly due to their faster fuel oxidation rate, low methanol permeability, and the ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1018H01M8/1072C08J5/22C08L81/06
CPCC08J5/2256C08J2381/06H01M8/1018H01M8/1072Y02E60/50
Inventor 潘昱张启东贺高红焉晓明王庭昀许小伟
Owner DALIAN UNIV OF TECH
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