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Polyketone anion exchange membrane and preparation method thereof

An anion-exchange membrane and polyketone-based membrane technology, applied in the field of polyketone resin-based anion-exchange membrane and its preparation, to achieve high ion conductivity, good mechanical properties and thermal stability, low swelling and dimensional stability

Active Publication Date: 2019-08-02
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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  • Polyketone anion exchange membrane and preparation method thereof
  • Polyketone anion exchange membrane and preparation method thereof
  • Polyketone anion exchange membrane and preparation method thereof

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preparation example Construction

[0038] 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.

[0039] The preparation method of polyketone-based anion exchange membrane of the present invention can adopt following preparation method:

[0040] 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;

[0041] 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

[0051] (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;

[0052] (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 for 13 hours at 30°C;

[0053] (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 a film in the frame;

[0054] (4) Put the membrane obtained in step (3) into ethanol to fully wash it for 3 to 4 times, and dry it at 60°C; soak the dried membrane in methyl iodide, rea...

Embodiment 2

[0057] (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;

[0058] (2) Add 43.42 mg of bismuth nitrate to the obtained polyketone resin solution, and disperse it by ultrasonic and stirring; add 62 μL of 1,2-propylenediamine (diamine and 1,4-dicarbonyl) after 5 minutes The reaction molar ratio is 1:6), stirred and reacted for 13 hours at 30°C;

[0059] (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 a film in the frame;

[0060] (4) Put the membrane obtained in step (3) into ethanol to fully wash it for 3 to 4 times, and dry it at 60°C; soak the dried membrane in methyl iodide, r...

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Abstract

The invention relates to a polyketone anion exchange membrane and a preparation method thereof, and belongs to the field of functional membrane materials. The invention provides the preparation methodfor the polyketone anion exchange membrane. The preparation method comprises the following steps: (1) dissolving polyketone resin in an organic solvent to form a polyketone solution; (2) performing Paal-Knorr reaction on the polyketone solution and diamine under the action of a catalyst to obtain a precursor solution, then removing the catalyst to obtain a membrane casting solution; namely, adding the catalyst and the diamine into the polyketone solution, and stirring and reacting for 10 to 15 hours at 20 to 40 DEG C, wherein the catalyst is triethylamine or bismuth nitrate; (3) casting the membrane casting solution to form a polyketone membrane; and (4) performing quaternization treatment on the polyketone membrane to obtain the polyketone anion exchange membrane. The polyketone anion exchange membrane prepared by the preparation method has high electrical conductivity; in addition, the performance of the obtained anion exchange membrane can be controlled by controlling the using amount of the diamine.

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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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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