Side chain type homogeneous anion exchange membrane and preparation method thereof

A technology of anion exchange membrane and side chain, which is applied in the field of side chain type homogeneous anion exchange membrane and its preparation, can solve the problems of low conductivity and poor stability of anion exchange membrane, and achieve high ion conductivity, good stability, The effect of high response controllability

Active Publication Date: 2018-09-04
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Side chain type homogeneous anion exchange membrane and preparation method thereof
  • Side chain type homogeneous anion exchange membrane and preparation method thereof
  • Side chain type homogeneous anion exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
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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. A structural formula of the side chain type homogeneous anion exchange membrane is as shown in the description. The preparation method is characterized by firstly preparing an alkaline functional monomer containing a benzyl bromide group by utilizing a dibromo alkane compound and an alkaline functional reagent, and then enabling the alkaline functional monomer to react with an amino-containing polypropylene phosphine oxide compound, thus obtaining the side chain type homogeneous anion exchange membrane. The side chain type homogeneous anion exchange membrane prepared by the invention has the characteristics of controllable structure, high ion exchange capacity, high conductivity,good chemical stability and the like, and can meet the demands 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 Applications(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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