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N1 position-substituted imidazole compound and alkaline anion exchange membrane, and preparation methods thereof

A technology of imidazole compounds and basic anions, applied in organic chemistry, climate sustainability, final product manufacturing, etc., to achieve good thermodynamic stability, environmental friendliness, and easy OH-conduction

Inactive Publication Date: 2016-07-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there has been no relevant research on imidazole-type basic anion exchange membranes with different alkyl substitutions at the N1 position.

Method used

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  • N1 position-substituted imidazole compound and alkaline anion exchange membrane, and preparation methods thereof
  • N1 position-substituted imidazole compound and alkaline anion exchange membrane, and preparation methods thereof
  • N1 position-substituted imidazole compound and alkaline anion exchange membrane, and preparation methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] in 50mLCCl 4 Add 2g of polyether ketone polymer to it, and dissolve it with magnetic stirring in a condensing cycle at 40°C. Under the condition of an ice-water bath, add 0.5 g of trifluoroacetic acid, stir for 10 min, then slowly drop in 10 mL of chloromethyl ether, and stir for 4 h at 15-17°C. The reactants were poured into absolute ethanol to precipitate solids to obtain chloromethylated polyether ketone polymers, which were thoroughly washed with ethanol and deionized water for several times, and vacuum-dried at 40°C for use. Add 0.5 g of chloromethylated polyether ketone polymer to 10 mL of dimethylacetamide, stir magnetically at 70°C to dissolve it, then add 0.096g of 1,2-dimethylimidazole, stir at 70°C for 24 hours. After the reaction solution returned to room temperature, it was filtered, and the film was cast in a blast drying oven at 50°C by volatile solvent. After the prepared membrane was fully washed with deionized water, it was stored in sealed deionized...

Embodiment 2

[0068] in 80mLCCl 4 Add 2g of polyether ketone polymer to 60°C condensation cycle magnetic stirring to dissolve it. Under the condition of ice-water bath, add 10g of tin tetrachloride, then slowly drop into 10mL of 1,4-dichloromethoxybutane, and react at 15°C for 7h. The reactants were poured into deionized water to precipitate solids to obtain chloromethylated polyether ketone polymers, which were then fully washed with deionized water and vacuum-dried at 45°C for use. Add 4 g (about 40 mmol) of 2-isopropylimidazole into 10 mL of acetonitrile, and stir it magnetically to dissolve it. Under the condition of an ice-water bath, 4 g of 60% NaH / kerosene solid (100 mmol) was added, and after stirring for 10 min, 17.2 mL (about 72 mmol) of n-bromodecane was added, and stirred overnight at room temperature. The reaction solution was poured into water, then extracted and separated with ethyl acetate to obtain the organic matter in the upper layer, and the organic matter was washed w...

Embodiment 3

[0073] in 50mLCCl 4 Add 2g of polystyrene to it, and dissolve it with magnetic stirring in a condensing cycle at 40°C. Under the condition of an ice-water bath (17°C), 2.23g of tin tetrachloride was added, and then 10mL of 1,4-dichloromethoxybutane was slowly added dropwise, and the reaction was carried out at room temperature for 4h. The reactant was poured into deionized water to precipitate a solid to obtain chloromethylated polystyrene, which was then thoroughly washed with deionized water and vacuum-dried at 45°C for use. Add 4 g (about 29 mmol) of 2-butylimidazole into 10 mL of dimethylformamide, and stir it magnetically to dissolve it. Under the condition of an ice-water bath, 6.7 g of potassium tert-butoxide (60 mmol) was added, and after stirring for 10 min, 10.0 mL (about 72 mmol) of n-bromohexane was added, and stirred overnight at room temperature. The reaction solution was poured into water, then extracted and separated with ethyl acetate to obtain the organic m...

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Abstract

In the formula of an N1 position-substituted imidazole compound, R2 is a C1-C10 straight-chain paraffin; and R2 is a C1-C9 chain alkane, or a C3-C6 cycloalkane, or a phenyl group, or a biphenyl group. An alkaline anion exchange membrane comprises a halomethylated high-molecular polymer main chain and an N1 position-substituted imidazole branch chain represented by a molecular formula shown in the description. A preparation method of the alkaline anion exchange membrane comprises the following steps: synthesizing N1 position-substituted imidazole; preparing the halomethylated high-molecular polymer main chain; and preparing the N1 position-substituted imidazole type alkaline anion exchange membrane. The N1 position-substituted imidazole has the advantages of good stability, no toxicity and moderate molecular weight; and the N1 position-substituted imidazole type alkaline anion exchange membrane prepared in the invention has the advantages of uniform and smooth surface, good thermal stability, good mechanical strength, and good application values in alkaline fuel cells.

Description

technical field [0001] The invention belongs to the field of polymer compounds and alkaline anion exchange membranes, and specifically relates to N1 alkyl-substituted imidazole and N1 alkyl-substituted imidazole type alkaline anion exchange membranes and a preparation method. Background technique [0002] Compared with traditional proton exchange membrane fuel cells, alkaline anion exchange membrane fuel cells have the advantages of fast electrode reaction kinetics and weak corrosion environment, so the electrodes of alkaline anion exchange membrane fuel cells can use non-noble metals as catalysts, The cost is greatly reduced; and compared with alkaline fuel cells, alkaline anion exchange membrane fuel cells can avoid problems such as electrolyte loss and carbonation caused by liquid electrolytes. Therefore, researchers in various fields have devoted a lot of work to the research on alkaline anion exchange membrane fuel cells. However, alkaline anion exchange membrane fuel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/58C08G65/48C08F12/08C08F8/30C08F8/24C08J5/22H01M8/10
CPCC07D233/58C08F8/24C08F8/30C08F12/08C08G65/48C08J5/22H01M8/10Y02E60/50Y02P70/50
Inventor 孙公权杨丛荣王素力
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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