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A kind of side chain type homogeneous anion exchange membrane and preparation method thereof

An anion exchange membrane and side chain technology, applied in the field of side chain type homogeneous anion exchange membrane and its preparation, can solve the problems of poor stability and low conductivity of anion exchange membrane, and achieve good stability, high ionic conductivity, Structural controllable effects

Active Publication Date: 2021-06-08
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, in order to overcome the problems of low conductivity and poor stability of the above-mentioned anion exchange membranes existing in the prior art, the present invention aims to provide a side chain type homogeneous anion exchange membrane and a preparation method thereof

Method used

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  • A kind of side chain type homogeneous anion exchange membrane and preparation method thereof
  • A kind of side chain type homogeneous anion exchange membrane and preparation method thereof
  • A kind of side chain type homogeneous anion exchange membrane and preparation method thereof

Examples

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Effect test

Embodiment 1

[0045] 1, the preparation of the basic functionalization reagent that contains Bian bromine group: in the one-necked flask of 100mL, add 1,6-dibromohexane 0.244g (1mmol), add 20mL acetone as solvent, utilize magnetic stirring to react liquid Stir to ensure that the system is evenly mixed; 0.04926g (0.6mmol) of 1-methylimidazole is dissolved in 20mL of acetone, and the acetone solution of trimethylamine is slowly added dropwise to the single-necked flask using a constant pressure dropping funnel, and the After reacting for 10 hours, stop stirring, and filter the reaction solution with suction to obtain a white solid, and add acetone again to wash and remove unreacted raw materials. body;

[0046] 2. Preparation of side chain type polymers: Add 0.5g polyphenylene phosphine oxide polymer into a 100mL three-necked flask, add 20ml N-methylpyrrolidone as a solvent, after the reactants are completely dissolved, blow nitrogen, add 1390μL N, N-diisopropylethylamine was used as an acid...

Embodiment 2

[0050] 1. Preparation of the basic functionalization reagent containing Bian bromine group: adopt the same preparation process as in Example 2, the amount of the basic functionalization reagent added is 0.8mmol, and a monomer with similar structure is obtained.

[0051] 2. Preparation of side chain type polymer: adopt the same preparation process as in Example 2.

[0052] 3. Film formation: the same preparation process as in Example 2 was adopted.

[0053] After measurement, the water content of the homogeneous anion exchange membrane prepared in this embodiment is 31.6%, the ion exchange capacity is 1.57mmol / g dry film, and the OH - The conductivity is 3.8×10 -2 S / cm.

Embodiment 3

[0055] 1, the preparation of the basic functionalization reagent containing Bian bromine group: adopt the preparation process identical with embodiment 2, the basic functionalization reagent added changes triethylamine into.

[0056] 2. Preparation of side chain type polymer: the same preparation process as in Example 2 was adopted, and the mass of the basic functionalized monomer containing Bian bromine group was added to be 3.2 g.

[0057] 3. Film formation: the same preparation process as in Example 2 was adopted.

[0058] After measurement, the water content of the homogeneous anion exchange membrane prepared in this embodiment is 51.6%, the ion exchange capacity is 1.66mmol / g dry film, and the OH - The conductivity is 4.5×10 -2 S / cm.

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Abstract

The invention discloses a side chain type homogeneous anion exchange membrane and a preparation method thereof, wherein the structural formula of the side chain type homogeneous anion exchange membrane is as follows: The present invention firstly utilizes a dibromoalkane compound to react with an alkaline functionalization reagent to prepare a The basic functional monomer of Bian bromine group is then reacted with amino-containing polyphenylene phosphine oxide to obtain a side chain type anion exchange membrane. The anion exchange membrane prepared by the invention has the characteristics of controllable structure, high ion exchange capacity, high electrical conductivity, good chemical stability and the like, and can meet the needs of different application fields.

Description

technical field [0001] The invention relates to a side chain type homogeneous anion exchange membrane and a preparation method thereof, belonging to the technical field of membranes. Background technique [0002] At present, anion-exchange membranes are widely used in diffusion dialysis, electrodialysis, alkaline fuel cells, recovery of useful metals in sewage, electrophoresis wastewater treatment, and electrochemical sensors. industry's attention. The currently prepared anion exchange membranes generally have the problems of low conductivity and poor stability. [0003] The preparation method of anion exchange membrane has been widely reported. For example, Holland "Solid Films Journal" (ThinSolid Films, 2011, 519, 2155-2162) reported a method for preparing anion exchange membrane by irradiation grafting. On the (PVC) film, p-chloromethylstyrene was grafted on the surface of the PVC film by plasma irradiation, and an anion exchange membrane was prepared by trimethylamine ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/78B01D69/02B01D67/00C08G79/04
CPCB01D67/0011B01D69/02B01D71/78B01D2311/2623B01D2325/42C08G79/04
Inventor 冉瑾
Owner HEFEI UNIV OF TECH
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