Quaternary ammonium salt functionalized polysulfone/nano attapulgite hybridized anion exchange membrane and preparation method thereof

An anion exchange membrane and nano attapulgite technology, applied in the direction of anion exchanger materials, chemical instruments and methods, membranes, etc., can solve the problems of hydroxide ion conductivity and alkali resistance stability to be improved, and achieve good resistance Alkali stability, large reserves, simple and safe experimental process

Active Publication Date: 2019-11-12
HUAIYIN TEACHERS COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although significant progress has been made in the preparation of anion-exchange membranes, their hydroxide ion conductivity and alkali-resistant stability still need to be improved.

Method used

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  • Quaternary ammonium salt functionalized polysulfone/nano attapulgite hybridized anion exchange membrane and preparation method thereof
  • Quaternary ammonium salt functionalized polysulfone/nano attapulgite hybridized anion exchange membrane and preparation method thereof
  • Quaternary ammonium salt functionalized polysulfone/nano attapulgite hybridized anion exchange membrane and preparation method thereof

Examples

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preparation example Construction

[0051] For polysulfone functionalized with quaternary ammonium salt as shown in formula (I), its preparation method mainly includes the following steps:

[0052] Dissolve polysulfone in the first organic solvent, stir to form a polymer solution, then add chloromethylation reagent and catalyst, inert gas protection, stir and react for a period of time to obtain polysulfone with different chloromethylation degrees, the chloromethylation The base reagent is trimethylchlorosilane and paraformaldehyde, the catalyst is anhydrous tin tetrachloride or anhydrous tin dichloride; the chloromethylated polysulfone material is dissolved in the second organic solvent, and the alkaline function is added Reagent, react to obtain the polysulfone solution of positively charged quaternary ammonium salt functionalization;

[0053] Polysulfone should first be dissolved in the first organic solvent, the first organic solvent is preferably chloroform, dichloromethane, N-methyl-2 pyrrolidone, N,N-dime...

Embodiment 1

[0089] Example 1 Preparation of chloromethylated polysulfone

[0090] Add 3.0 g of polysulfone and 150 mL of dichloromethane to a four-neck flask equipped with an inlet pipe, mechanical stirring, and condensing reflux, under nitrogen protection, and condense and reflux at 30 °C for 30 min to fully dissolve, then add 1.02 g of paraformaldehyde, 8.6 mL trimethylchlorosilane, 0.08 mL anhydrous tin tetrachloride, nitrogen protection, reflux at 45 °C and stir for 36 h. After the reaction, precipitate with excess absolute ethanol, obtain a white solid by vacuum filtration, which is the chloromethylated polysulfone material, wash with absolute ethanol three times, and finally vacuum-dry the chloromethylated polysulfone at 60 °C for 24 h to obtain chloromethylated polysulfone material. The proton nuclear magnetic resonance spectrum of the chloromethylated polysulfone material that embodiment 1 obtains is as follows figure 1 shown, from figure 1 It can be seen that the chloromethy...

Embodiment 2

[0100] Example 2 Preparation of positively charged quaternary ammonium salt functionalized polysulfone / attapulgite ion exchange membrane

[0101] Preparation of chloromethylated polysulfone: the same preparation process as in Example 1 was adopted.

[0102] Uniformly dispersed nano-attapulgite solution configuration: put 0.0231 g of high-grade nano-attapulgite in 50 mL of N,N-dimethylacetamide solution, disperse with high-power ultrasonic for 15 min, and obtain 0.462 mg / mL nano- Attapulgite in N,N-dimethylacetamide solution.

[0103] Preparation of casting solution: Take 3.3 g of chloromethylated polysulfone material, add 33 mL of N,N-dimethylacetamide, stir and dissolve at 30 °C to form a polymer solution with a mass volume fraction of 10%, and then add 3.4 mL of trimethylamine solution was stirred at 50 °C, and the positively charged quaternary ammonium salt functionalization reaction of chloromethylated polysulfone was carried out, and the reaction time was 24 h. Then tak...

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Abstract

The invention provides a positively-charged quaternary ammonium salt functionalized polysulfone/nano attapulgite hybridized anion exchange membrane and a preparation method thereof, and belongs to thefield of alkaline anion exchange membrane fuel cells. In the method, trimethylchlorosilane and paraformaldehyde are used as polysulfone chloromethylation reagents, and tin chloride is used as a catalyst; the chloromethylation degree of polysulfone is controlled by controlling the molar ratio of polysulfone to trimethylchlorosilane, paraformaldehyde and tin chloride and the reaction time of chloromethylation; a positively charged quaternary ammonium salt functional group is adopted as a functional group for transmitting OH <-> ions, and the functional group is grafted to chloromethylated polysulfone through a Menschutkin reaction; then, hydrophilic nano attapulgite is adopted as an inorganic additive material and dispersed into a positively charged quaternary ammonium salt functionalized polysulfone solution through high-power ultrasonic, mechanical stirring and other methods, and the positively charged quaternary ammonium salt functionalized polysulfone/nano attapulgite hybrid anion exchange membrane is prepared through a tape casting method.

Description

technical field [0001] The invention belongs to the field of alkaline anion exchange membrane fuel cells, and in particular relates to a positively charged quaternary ammonium salt functionalized polysulfone / nanometer attapulgite hybrid anion exchange membrane and a preparation method thereof. Background technique [0002] With the rapid development of the global economy, the demand for energy is increasing day by day. The excessive development and large-scale consumption of traditional fossil energy have also brought serious pollution problems to the environment and climate, making the international demand for clean and efficient energy continue to grow. . As a high-efficiency energy conversion device that directly converts part of the Gibbs free energy in the fuel chemical energy into electrical energy through electrochemical redox reactions without the limitation of the Carnot heat engine cycle, the fuel cell has the advantages of low operating temperature, fast start-u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D69/02B01D67/00B01J41/08C08G75/20H01M8/1048H01M8/1067H01M8/1069H01M8/1072
CPCB01D67/0079B01D69/02B01D71/02B01D71/68B01D2325/42B01J41/08C08G75/20H01M8/1048H01M8/1067H01M8/1069H01M8/1072Y02E60/50
Inventor 周守勇李业洋赵宜江薛爱莲李梅生杨大伟张艳邢卫红张玉洁胡磊许家兴张莉莉
Owner HUAIYIN TEACHERS COLLEGE
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