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Modified anion-exchange membrane, preparation method thereof and membrane capacitive deionization device

An anion exchange membrane, modified technology, applied in ion exchange treatment devices, organic anion exchangers, ion exchange, etc., can solve the problems of increasing the ion-to-electrode transmission distance, decreasing mechanical strength, increasing resistance, etc., to achieve the ion transmission rate. The effect of lifting, increasing moisture content, and reducing resistance

Inactive Publication Date: 2019-05-28
JIANGSU MAYMUSE ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the ion exchange membrane will increase the transmission distance of ions to the electrode, which has a negative impact on the performance of MCDI
Especially when the internal structure of the ion exchange membrane is dense, the water content of the membrane will decrease, the resistance will increase, and the ion transmission rate will also decrease accordingly.
However, the compactness of the membrane is affected by the addition of a crosslinking agent during the membrane synthesis process. If the amount of crosslinking agent is reduced in order to reduce the compactness, the structure of the membrane will be loose, the mechanical strength will decrease, and the ion selective permeability will decrease. Disadvantage and improve the performance of the membrane

Method used

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  • Modified anion-exchange membrane, preparation method thereof and membrane capacitive deionization device
  • Modified anion-exchange membrane, preparation method thereof and membrane capacitive deionization device
  • Modified anion-exchange membrane, preparation method thereof and membrane capacitive deionization device

Examples

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Embodiment 1

[0024] like figure 1 As shown, this Example 1 provides a method for preparing a modified anion exchange membrane, comprising the following steps: step S1, preparing a base membrane for filling the modifying reagent in the base membrane; step S2, preparing a modified base Membrane, used to construct channels suitable for ion transmission in the basement membrane body; step S3, quaternization reaction; and step S4, after the quaternization reaction, alkalinize the membrane, and then repeatedly wash with deionized water to neutrality, and obtain the modified anion exchange membrane after drying.

[0025] In the preparation method of the present invention, modifying reagents are filled inside to form a basement membrane, then channels suitable for ion transmission are constructed in the basement membrane, and finally the modified anion exchange membrane is obtained through quaternization reaction. It will not bring negative effects, such as loose membrane structure, decreased mec...

Embodiment 2

[0040] On the basis of Example 1, this Example 2 provides a modified anion exchange membrane, which is suitable for being prepared by the aforementioned preparation method.

[0041] For the content of the components of the modified anion exchange and the specific implementation process, please refer to the relevant discussion in Example 1, which will not be repeated here.

Embodiment 3

[0043] On the basis of Example 1, this Example 3 provides a membrane capacitive deionization device, and the anion exchange membrane of the membrane capacitive deionization device is suitable for using the modified anion exchange membrane as described above.

[0044] For the content of the components of the modified anion exchange and the specific implementation process, please refer to the relevant discussion in Example 1, which will not be repeated here.

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Abstract

The invention belongs to the technical field of a modified anion-exchange membrane, and particularly relates to a modified anion-exchange membrane, a preparation method thereof and a membrane capacitive deionization device. The preparation method comprises the following steps of preparing a base membrane into which a modification reagent is charged, preparing a modified base membrane in which a channel suitable for ion transmission is constructed, and performing quaterisation to obtain the modified anion-exchange membrane. According to the modified anion-exchange membrane provided by the invention, the moisture content of the membrane is increased, the resistance is decreased, the ion transmission rate is improved, and no negative effects are caused. In addition, the desalting efficient ofthe modified anion-exchange membrane in the membrane capacitive deionization device can reach 75%, thereby improving the performance of the membrane capacitive deionization device.

Description

technical field [0001] The invention relates to the technical field of modified ion exchange membranes, in particular to a modified anion exchange membrane, a preparation method thereof and a membrane capacitive deionization device. Background technique [0002] Membrane capacitive electrosorption (MCDI) is a new type of water treatment technology, which has the advantages of high efficiency, environmental protection, and regeneration. The role of the ion-exchange membrane is to selectively permeate ions, that is, the cation-exchange membrane allows cations to pass through, while blocking the passage of anions; the anion-exchange membrane passes through anions, while blocking the passage of cations. In this way, ions can be prevented from being adsorbed on the opposite electrode for the second time when MCDI is desorbed. It can also reduce the same ion effect in the adsorption process and prevent the adsorbed ions from being disturbed and taken away by the water flow. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469B01J47/12B01J41/04
Inventor 沈敏王秋泽施良
Owner JIANGSU MAYMUSE ENVIRONMENTAL TECH CO LTD