A kind of imidazole ionic liquid and its preparation method and application

A technology of ionic liquids and imidazoles, applied in the preparation of anion-exchange membranes, in the field of preparation of imidazole-based ionic liquids, can solve the problems of poor stability of anion-exchange membranes, poor membrane performance improvement, and low ion conductivity. Achieve the effect of improving mechanical stability, improving ion conductivity, and good ion conductivity

Active Publication Date: 2021-11-19
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the currently produced anion exchange membranes generally have defects such as poor stability and low ion conductivity, which have become the focus of research to be overcome.
[0005] In order to solve the defects of anion exchange membranes, attempts have been made to introduce ionic liquids into anion exchange membranes, but the current technology of introducing ionic liquids into ion exchange membranes is rare, and the effect of membrane performance improvement is not good.

Method used

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  • A kind of imidazole ionic liquid and its preparation method and application
  • A kind of imidazole ionic liquid and its preparation method and application
  • A kind of imidazole ionic liquid and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] in N 2 Under the protection of 250ml three-neck round bottom flask, add 0.25mol potassium carbonate, 0.5mol 2-methylimidazole and 0.6mol acrylonitrile to 60mL anhydrous methanol, reflux and stir in 60°C oil bath for 12h, the reaction is complete ; After the reaction was stopped, unreacted raw materials and methanol were removed by rotary evaporation, and dried at 70°C for 24 hours under vacuum to obtain a yellow transparent liquid, which was 1-nitrile ethyl-2-methylimidazole. The yield was 82%.

[0049] in N 2 Under protection, in a 250ml three-necked round-bottomed flask, the synthesized 1-nitrile ethyl-2-methylimidazole (about 0.4mol) was mixed with 3-bromopropylamine hydrobromide in a molar ratio of 1:1, and dissolved In 50mL of anhydrous methanol, stir at reflux at 80°C for 24h. Methanol was distilled off under reduced pressure at 50°C. The obtained 0.34mol ionic liquid was diluted with 3ml of deionized water, and then 10% KOH solution was added to adjust the pH...

Embodiment 2

[0058] in N 2 Under the protection of 250ml three-neck round bottom flask, add 0.25mol potassium carbonate, 0.5mol 2-methylimidazole and 0.5mol chloroacetonitrile to 60mL anhydrous methanol, reflux and stir in 55℃ oil bath for 10h, the reaction is complete ; After the reaction was stopped, unreacted raw materials and solvents were removed by rotary evaporation, and dried at 60° C. under vacuum for 24 hours to obtain a light yellow transparent liquid, which was 1-nitrile methyl-2-methylimidazole. The yield is 80%.

[0059] in N 2 Under protection, in a 250ml three-neck round bottom flask, the synthesized 1-nitrile methyl-2-methylimidazole (about 0.4mol) was mixed with 3-bromopropylamine hydrobromide in a molar ratio of 1:1, and dissolved In 50mL of anhydrous methanol, stir at reflux at 80°C for 24h. Methanol was distilled off under reduced pressure at 50°C. The obtained 0.34mol ionic liquid was diluted with 3ml of deionized water, and then 10% KOH solution was added to adju...

Embodiment 3

[0063] in N 2 Under the protection of 250ml three-neck round bottom flask, add 0.25mol potassium carbonate, 0.5mol 2-methylimidazole and 0.6mol acrylonitrile to 60mL anhydrous methanol, reflux and stir in 60°C oil bath for 12h, the reaction is complete ; After stopping the reaction, unreacted raw materials and solvents were removed by rotary evaporation, and dried at 70° C. under vacuum for 24 hours to obtain a yellow transparent liquid, which was 1-nitrile ethyl-2-methylimidazole. The yield was 82%.

[0064] in N 2 Under protection, in a 250ml three-necked round-bottomed flask, the synthesized 1-nitrile ethyl-2-methylimidazole (about 0.4mol) was mixed with 2-bromoethylamine hydrobromide in a molar ratio of 1:1.1, Dissolve in 50mL of anhydrous methanol, and stir at reflux at 75°C for 24h. Methanol was distilled off under reduced pressure at 50°C. The obtained 0.33mol ionic liquid was diluted by adding 3ml of deionized water, then adding KOH solution with a mass fraction of...

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Abstract

The invention relates to an imidazole ionic liquid and its preparation method and application. The structural formula of the ionic liquid is as follows, wherein, m is 1, 2, 3 or 4; n is 2 or 3. The application of the imidazole ionic liquid is used in the anion exchange membrane of a synthetic battery. The anion exchange membrane includes: polymer matrix, inorganic particles and ionic liquid; wherein the mass ratio of inorganic particles to polymer matrix is ​​0.01-0.1:1, and the mass percentage of inorganic particles to ionic liquid is 1:2-4. The imidazole-type ionic liquid of the invention has low cost and relatively ideal alkali stability, and can be used as an ideal material for preparing anion exchange membranes.

Description

technical field [0001] The invention relates to the technical field of ionic liquids, in particular to the preparation of an imidazole ionic liquid and its application in the preparation of anion exchange membranes. [0002] technical background [0003] With the rapid development of today's society, my country's demand for energy is increasing, and energy issues have become the focus of social attention. Due to the rapid reduction of energy reserves and the increasingly serious environmental problems caused by the use of fossil energy, the development of new energy is also imminent. A fuel cell is an electrochemical device that uses hydrogen, biogas, and natural gas as fuel, and uses hydrogen peroxide, pure oxygen, or air as an oxidant to directly convert the chemical energy stored in the fuel and oxidant into electrical energy. Fuel cells can be divided into the following categories according to the type of electrolyte: solid oxide fuel cells, alkaline fuel cells, molten c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D233/61H01M8/1044
CPCC07D233/61H01M8/1044Y02E60/50
Inventor 张文林王雨昕和佳明赵勇琪霍宇李春利
Owner HEBEI UNIV OF TECH
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