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A kind of polyketone-based anion exchange membrane and preparation method thereof

An anion exchange membrane, polyketone-based membrane technology, applied in the field of polyketone resin-based anion exchange membrane and its preparation, to achieve the effects of low price, high ionic conductivity, low swelling degree and dimensional stability

Active Publication Date: 2020-09-15
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, there is no relevant report on the preparation of high-performance anion exchange membranes using Paal-Knorr reactions between diamines and polyketone resins in the prior art.

Method used

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  • A kind of polyketone-based anion exchange membrane and preparation method thereof
  • A kind of polyketone-based anion exchange membrane and preparation method thereof
  • A kind of polyketone-based anion exchange membrane and preparation method thereof

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preparation example Construction

[0037] The invention provides a method for preparing an anion exchange membrane. The polyketone resin is dissolved, reacted with a diamine in a solution state, cast the film using the reacted solution, then reacted with methyl iodide, and then reacted with sodium hydroxide The ion exchange membrane is carried out, and the polyketone resin-based anion exchange membrane is obtained after drying.

[0038] The preparation method of polyketone-based anion exchange membrane of the present invention can adopt following preparation method:

[0039] 1) Add the dried and weighed polyketone resin into a mixed solvent of hexafluoroisopropanol and dichloromethane with a mass ratio of 1:2.33, and stir and dissolve for 20 minutes at room temperature to obtain a polyketone solution;

[0040] 2) Add reactant polyketone 2.5mmol% bismuth nitrate to the obtained polyketone resin solution, and help it disperse by ultrasonic and stirring; add 1,2-propylenediamine after 5min, wherein 1,2-propylenedi...

Embodiment 1

[0050] (1) Add 0.5 g of the dried and weighed polyketone resin into a mixed solvent of hexafluoroisopropanol and dichloromethane with a mass ratio of 1:2.33, and stir at room temperature for 20 minutes to prepare polyketone with a mass fraction of 2.5 wt%. resin solution;

[0051](2) Add 43.42 mg of bismuth nitrate to the obtained polyketone resin solution, and disperse it by ultrasonic and stirring; add 47 μL of 1,2-propylenediamine (diamine and 1,4-dicarbonyl) after 5 minutes The reaction molar ratio is 1:8), stirred and reacted at 30°C for 13 hours;

[0052] (3) The reaction solution obtained in the previous step was left still for 5 minutes at 10° C. to remove the bismuth nitrate precipitated from the bottom layer. This process was repeated 3 times to obtain the casting solution; Cast into film in the frame;

[0053] (4) Put the membrane obtained in step (3) into ethanol to fully wash it 3 to 4 times, and dry it at 60°C; soak the dried membrane in methyl iodide, react fo...

Embodiment 2

[0056] (1) Add 0.5 g of the dried and weighed polyketone resin into a mixed solvent of hexafluoroisopropanol and dichloromethane with a mass ratio of 1:2.33, and stir at room temperature for 20 minutes to prepare polyketone with a mass fraction of 2.5 wt%. resin solution;

[0057] (2) Add 43.42 mg of bismuth nitrate to the obtained polyketone resin solution, and disperse it by ultrasonication and stirring; 5 minutes later, add 62 μL of 1,2-propylenediamine (diamine and 1,4-dicarbonyl The reaction molar ratio is 1:6), stirred and reacted for 13 hours at 30°C;

[0058] (3) The reaction solution obtained in the previous step was left still for 5 minutes at 10° C. to remove the bismuth nitrate precipitated from the bottom layer. This process was repeated 3 times to obtain the casting solution; Cast into film in the frame;

[0059] (4) Put the membrane obtained in step (3) into ethanol to fully wash it 3 to 4 times, and dry it at 60°C; soak the dried membrane in methyl iodide, re...

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Abstract

The invention relates to a polyketone resin-based anion exchange membrane and a preparation method thereof, belonging to the field of functional membrane materials. The invention provides a method for preparing a polyketone-based anion exchange membrane, the preparation method comprising the following steps: 1) dissolving a polyketone resin in an organic solvent to form a polyketone solution; 2) forming a polyketone solution and a diamine in a catalyst Under the action of Paal-Knorr reaction, the precursor solution is obtained, and then the catalyst is removed to obtain the casting solution; that is, the catalyst and diamine are added to the polyketone solution, and the reaction is stirred at 20-40°C for 10-15 hours. The catalyst It is triethylamine or bismuth nitrate; 3) casting the casting solution to form a polyketone-based membrane; 4) quaternizing the polyketone-based membrane to obtain a polyketone-based anion exchange membrane. The anion exchange membrane prepared by the invention has higher electrical conductivity; in addition, the performance of the anion exchange membrane can be controlled by controlling the amount of diamine used.

Description

technical field [0001] The invention relates to a polyketone resin-based anion exchange membrane and a preparation method thereof, belonging to the field of functional membrane materials. Background technique [0002] Anion exchange membrane (AEM) is a kind of high molecular polymer membrane that contains basic active groups and has selective permeability for anions. Commonly used polymer backbones include polyethersulfone, polyetherketone, and polyphenylene ether. Its commonly used cationic functional groups include quaternary ammonium group, imidazole, guanidino, pyridine, quaternary phosphorus and tertiary sulfur. Among them, the quaternary amine group is widely used in the preparation of anion exchange membranes because of its simple preparation process and wide choice of reactants. Anion exchange membranes are widely used in many fields. It is an important part of separation devices, purification devices and electrochemical components. It plays an important role in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/82B01D67/00B01D69/02C08G67/02
CPCB01D67/0011B01D69/02B01D71/82B01D2311/2623C08G67/02
Inventor 杨伟周一存包睿莹刘正英杨鸣波
Owner SICHUAN UNIV
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