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A kind of preparation method of ion exchange membrane with ordered ion conduction structure

An ion-exchange membrane and ion-conducting technology, applied in the field of ion-conducting polymer material preparation, can solve the problems of performance stability and service durability reduction, and achieve the effects of enhanced stability, broad application prospects, and reduced water absorption.

Active Publication Date: 2021-08-31
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, too high water absorption will cause significant swelling of the ion exchange membrane, resulting in reduced performance stability and durability of the membrane.

Method used

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  • A kind of preparation method of ion exchange membrane with ordered ion conduction structure
  • A kind of preparation method of ion exchange membrane with ordered ion conduction structure
  • A kind of preparation method of ion exchange membrane with ordered ion conduction structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Preparation of polymers containing metal coordination structures The proportion x of the chain segment containing the metal coordination structure is 50%, and the specific steps are: dissolve 1.6g of pentacyanamide iron sodium salt and 3.8g of 15-crown-5 in 10ml of water, and dissolve 0.4g of polyvinylpyridine in 10ml of methanol , mix the two solutions, react at 40°C for 36h, pour the reaction solution into water, wash the precipitate with 1mol / L dilute sulfuric acid for 3 times, then wash with ultrapure water until pH = 7, and then dry at 80°C for 12h. product;

[0040] (2) Dissolve this polymer containing metal coordination structure in dimethylacetamide together with polysulfone and phosphotungstic acid in a mass ratio of 5:45:50, so that the total concentration of the solute is 500g / The film-making solution of L, after fully dissolving, let it stand for defoaming;

[0041] (3) Pour the film-making solution into a petri dish, and evaporate the solvent at 80°...

Embodiment 2

[0050] (1) Preparation of polymers containing metal coordination structures The chain segment ratio x of the metal-containing coordination structure is 80%. The specific steps are: dissolve 1g styrene, 5g dimethylsilyl bridged nickelocene, 0.1g tetramethylpiperidine oxide and 0.3g azobisisobutyronitrile React in 100ml of toluene at 130°C for 12h under the protection of nitrogen, pour the reaction solution into water, wash the precipitate with ultrapure water until pH = 7, then dry at 80°C for 12h to obtain the product;

[0051] (2) The polymer containing the metal coordination structure is dissolved in dimethylformamide together with the magnesium-aluminum layered double hydroxide in a ratio of 75:25 by mass, and the total concentration of the solute is 100g / The film-making solution of L, after fully dissolving, let it stand for defoaming;

[0052] (3) Pour the film-making solution into a petri dish, and evaporate the solvent at 20° C. for 48 hours to form a film under the ...

Embodiment 3

[0057] (1) Preparation of polymers containing metal coordination structures The chain segment ratio x of the metal-containing coordination structure is 100%. The specific steps are: dissolve 3g of vinylcobaltocene, 0.1g of tetramethylpiperidine oxide and 0.3g of azobisisobutyronitrile in 100ml of toluene, and protect React at 130°C for 12 hours, then lower the temperature to room temperature, add 1g tetracyanoethylene solution in 20ml toluene with a syringe, continue to react for 12 hours, pour the reaction solution into water, soak the precipitate in 1mol / L sodium hydroxide for 12 hours, and then use super Wash with pure water to pH = 7, then dry at 80°C for 12 hours to obtain the product;

[0058] (2) This polymer containing the metal coordination structure is dissolved in nitrogen methyl pyrrolidone alone, and made into a film-making solution with a total concentration of solute of 10g / L, which is fully dissolved and allowed to stand for defoaming;

[0059] (3) Pour the f...

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Abstract

The invention belongs to the technical field of preparation of ion-conducting polymer materials, and discloses a method for preparing an ion-exchange membrane with an ordered ion-conducting structure. Firstly, a polymer A containing a metal coordination structure is synthesized; and then the polymer A is separated, or Polymer A and polymer B, or polymer A and filler, or polymer A and polymer B and filler are prepared into a film-making solution, fully dissolved and left to defoam; then pour the film-making solution into a petri dish, and Under the conditions of certain pressure, temperature, time, magnetic field strength or electric field strength, the film is formed by solvent evaporation method, spin coating method, dip coating method, roll-to-roll screen printing method or inkjet printing method; after the film forming process, The ion exchange membrane can be obtained by ionizing the membrane. The invention adopts the treatment technology of applying a magnetic field or an electric field during film formation, and can regulate and control the ion conduction structure of the ion exchange membrane in order to prepare a high-efficiency and durable ion exchange membrane with an orderly ion conduction structure.

Description

technical field [0001] The invention belongs to the technical field of preparation of ion-conducting polymer materials, and in particular relates to a preparation method of an ion-exchange membrane. [0002] technical background [0003] Ion exchange membranes are key materials in many fields such as adsorption, electrolysis, separation, batteries, and supercapacitors. As two important performance parameters of ion exchange membranes, ionic conductivity and water absorption always show a positive correlation, because only hydrophilic ionized groups can play an efficient role in ion conduction. However, too high water absorption will cause significant swelling of the ion exchange membrane, resulting in reduced performance stability and durability of the membrane. Relevant studies have shown that increasing the degree of separation between the hydrophilic and hydrophobic phases of ion exchange membranes helps to increase the ionic conductivity of the membrane while reducing th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D71/26B01D71/34B01D71/38B01D71/56B01D71/68B01D71/76H01M8/1086
CPCB01D67/0002B01D67/0011B01D67/0079B01D71/26B01D71/34B01D71/38B01D71/56B01D71/68B01D71/76B01D2325/42H01M8/1086Y02E60/50
Inventor 尹燕张俊锋刘鑫迈克尔·多米尼克·盖费
Owner TIANJIN UNIV