Preparation method of polymer anion exchange membrane

An anion exchange membrane and polymer technology, which is applied in the field of preparation of functional polymer materials, can solve the problems of increasing technical complexity and cost, affecting the phase separation structure, etc., and achieves a simple heat treatment crosslinking process, low cost, and improved physical stability. sexual effect

Active Publication Date: 2020-04-10
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the covalent cross-linking technology often needs to add an additional cross-linking agent to the membrane, which will undoubtedly affect the phase separation structure mentioned above (Chemical Communication, 2011, 47, 2856-2858). In addition, the additional cross-linking reaction step is also Tends to increase technical complexity and cost

Method used

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  • Preparation method of polymer anion exchange membrane
  • Preparation method of polymer anion exchange membrane
  • Preparation method of polymer anion exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Dissolve 4g of polyether ether ketone in 240mL of concentrated sulfuric acid at a temperature of -10°C; then add 20ml of chloromethyl octyl ether, raise the temperature by 10°C, and react for 50 minutes to obtain poly Ether ether ketone; reacted for 18h to obtain polyether ether ketone with a high degree of chloromethylation; the polymer was precipitated in ethanol;

[0038] (2) 25 mg of high chloromethylated polyether ether ketone prepared in step (1) was dissolved in NMP, and 225 mg of high chloromethylated polyether ether ketone prepared in step (1) was dissolved in NMP, the obtained The mass concentrations of the low-chloromethylated polyetheretherketone solution and the high-chloromethylated polyetheretherketone solution are both 5wt%;

[0039] 30mg of 1-methylimidazole was added to the high chloromethylated polyetheretherketone solution to react at room temperature for 2 hours, then added to the low chloromethylated polyetheretherketone solution, and reacted a...

Embodiment 2

[0044] (1) Dissolve 4g of polyether ether ketone in 240mL of concentrated sulfuric acid at a temperature of -10°C; then add 20ml of chloromethyl octyl ether, raise the temperature by 10°C, and react for 50 minutes to obtain poly Ether ether ketone; reacted for 18h to obtain polyether ether ketone with a high degree of chloromethylation; the polymer was precipitated in water;

[0045] (2) Dissolving 50 mg of high chloromethylated polyether ether ketone prepared in step (1) in NMP, and dissolving 200 mg of high chloromethylated polyether ether ketone prepared in step (1) in NMP, the resulting The mass concentrations of the low-chloromethylated polyetheretherketone solution and the high-chloromethylated polyetheretherketone solution are both 4wt%;

[0046] 27mg of 1-methylimidazole was added to the high chloromethylated polyetheretherketone solution to react at room temperature for 3 hours, then added the low chloromethylated polyether ether ketone solution, and reacted at 50°C f...

Embodiment 3

[0051] (1) Dissolve 4g of polyetheretherketone in 240mL of concentrated sulfuric acid at -10°C. Then add 20ml of chloromethyl octyl ether, raise the temperature by 10°C, and react for 50 minutes to obtain polyether ether ketone with low degree of chloromethylation; react for 18 hours to obtain polyether ether ketone with high degree of chloromethylation. The polymer precipitates out in water;

[0052] (2) Dissolving 75 mg of high chloromethylated polyether ether ketone prepared in step (1) in NMP, and dissolving 175 mg of high chloromethylated polyether ether ketone prepared in step (1) in NMP, the resulting The mass concentrations of the low-chloromethylated polyetheretherketone solution and the high-chloromethylated polyetheretherketone solution are both 7wt%;

[0053] 35 mg of 1-methylimidazole was added to the high chloromethylated polyetheretherketone solution for room temperature reaction for 1 hour, then the low chloromethylated polyetheretherketone solution was added,...

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Abstract

The invention belongs to the technical field of preparation of functional macromolecule materials, and discloses a preparation method of a polymer anion exchange membrane. The preparation method comprises the following steps: carrying out partial imidazolium treatment on two polyetheretherketone macromolecules with different chloromethylation degrees, blending to obtain an anion exchange membranewith a bicontinuous phase separation structure, and carrying out self-cross-linking on the anion exchange membrane with the bicontinuous phase separation structure through heat treatment to obtain thepolymer anion exchange membrane. According to the invention, by using two macromolecules with different chloromethylation degrees, the macromolecules can simultaneously contain the chloromethyl and the cationic group by controlling the content of an ionization reagent methylimidazole, an anion exchange membrane with a bicontinuous phase separation structure can be formed after mixing and membraneforming, and heating-annealing treatment is carried out to initiate the reaction of the chloromethyl in the membrane to form a self-cross-linking structure, so that the ion conduction and the stability of the anion exchange membrane are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional polymer materials, and in particular relates to a preparation method of a polymer anion exchange membrane. Background technique [0002] Anion exchange membranes have attracted the attention of researchers due to their application value in new energy, environmental protection and chemical industries, such as fuel cells, flow batteries, electrodialysis, and electrolysis industries. Although cation exchange membranes represented by perfluorosulfonic acid membrane Nafion have been widely used commercially, anion exchange membranes have been lacking in high-performance ion exchange membranes that can match them. At the same time, new application fields such as fuel cell (FC) and reverse osmosis electrodialysis (RO-ED) have brought new challenges and higher performance requirements for anion exchange membranes. At present, the anion exchange membrane should further improve its ion co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J41/13
CPCB01J41/13Y02E60/50
Inventor 姜忠义黄彤尹燕张俊锋
Owner TIANJIN UNIV
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