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Preparation method of membrane capacitive deionization electrode and membrane capacitive deionization electrode

An electro-adsorption and electrode technology, which is applied in the field of water purification, can solve the problems of low electrode desalination efficiency, high energy consumption, affecting the normal use of electrodes and industrial promotion, etc., to reduce migration and diffusion resistance, simple preparation process, and reduce the same ion effect Effect

Active Publication Date: 2019-03-22
JIANGSU MAYMUSE ENVIRONMENTAL TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the problems of ion transmission, contact resistance and membrane resistance in the process of combining the anion and cation membrane layers in MCDI with CDI electrodes, the existing electrodes have low desalination efficiency and high energy consumption, which affects the normal use and industrialization of electrodes. to promote

Method used

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  • Preparation method of membrane capacitive deionization electrode and membrane capacitive deionization electrode
  • Preparation method of membrane capacitive deionization electrode and membrane capacitive deionization electrode
  • Preparation method of membrane capacitive deionization electrode and membrane capacitive deionization electrode

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Embodiment 1

[0021] Such as figure 1 As shown, the present embodiment 1 provides a preparation method of an electrode, comprising: preparing conductive carbon electrode slurry and ion exchange membrane layer slurry respectively; preparing conductive carbon electrode through conductive carbon electrode slurry; ion exchange membrane layer slurry The material is sprayed on the surface of the conductive carbon electrode; and vacuum-dried to obtain the membrane capacitor electro-adsorption electrode. The specific operation is as follows:

[0022] (1) Get 3g of sodium carboxymethyl cellulose and add 200ml of deionized water to ultrasonic 2h to obtain a uniform aqueous binder solution (or binder solution), and then combine 3.4g of graphene with 13.6g of carbon nanotubes Add it to the aqueous binder solution and stir for 3 hours at a speed of 300r / min under an electric mixer to obtain a conductive carbon electrode slurry. After sieving through a 200-mesh screen, vacuum pumping to remove the mixed...

Embodiment 2

[0026] (1) Take 3g of sodium carboxymethylcellulose and add 200ml of deionized water for ultrasonication for 2h to obtain a uniform aqueous binder solution, then add 4.25g of graphene and 12.75g of carbon nanotubes to the aqueous binder solution Stir for 3 hours at a speed of 300r / min under an electric mixer to obtain a conductive carbon electrode slurry, sieve through a 200-mesh screen, and then vacuum pump to remove the air bubbles in the mixed solution (conductive carbon electrode slurry), and finally the conductive carbon electrode slurry The electrode slurry was sprayed on the surface of graphite paper to obtain two identical conductive carbon electrodes.

[0027] (2) Take 20 g of anion and cation exchange resins and crush them into powdery resin powders with a vibrating mill, and wash them with deionized water repeatedly for 5 times. First soak the cleaned cation exchange resin powder in 0.1M NaOH solution completely, then use deionized water to filter and wash repeatedl...

Embodiment 3

[0030](1) get the polyvinyl alcohol of 3g to add the deionized water ultrasonic 2h of 200ml to obtain uniform aqueous binder solution, then the graphene of 5.7g and the carbon nanotube of 11.3g are joined in the aqueous binder solution, in Stir with an electric mixer at a speed of 300r / min for 3 hours to obtain a conductive carbon electrode slurry, sieve through a 200-mesh screen, and then vacuum pump to remove the air bubbles in the mixed solution (conductive carbon electrode slurry), and finally the conductive carbon electrode slurry The material was sprayed on the surface of graphite paper to obtain two identical conductive carbon electrodes.

[0031] (2) Take 20 g of anion and cation exchange resins and crush them into powdery resin powders with a vibrating mill, and wash them with deionized water repeatedly for 5 times. First soak the cleaned cation exchange resin powder in 0.1M NaOH solution completely, then use deionized water to filter and wash repeatedly until neutral...

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Abstract

The invention belongs to the field of water purification, and specifically relates to a preparation method of a membrane capacitive deionization electrode. The preparation method comprises the following steps: preparing conductive carbon electrode paste and ion exchange membrane layer paste respectively; preparing a conductive carbon electrode from the conductive carbon electrode paste; spraying the ion exchange membrane layer paste on the surface of the conductive carbon electrode; and performing vacuum drying to obtain the membrane capacitive deionization electrode. According to the preparation method involved in the invention, an ion exchange membrane and the conductive carbon electrode are integrated, so that the capacitive deionization effect is enhanced; the common ion effect is reduced; a channel is provided for ion migration; and migration diffusion resistance is lowered, thereby improving the desalting efficiency of the electrode, and lowering the energy consumption.

Description

technical field [0001] The invention relates to the field of water purification, in particular to a preparation method of a membrane capacitance electrosorption electrode and the membrane capacitance electrosorption electrode. Background technique [0002] Capacitive deionization (CDI) is a new type of desalination technology. Its principle is to use the charging and discharging process of the electrode to absorb and desorb ions in the water solution; due to its low energy consumption, high desalination rate, environmental friendliness, and long life It has been extensively studied due to its long-term advantages. Membrane capacitive deionization (MCDI) technology is an enhanced process of capacitive desalination technology. Anion and cation membrane layers are introduced on the electrode surface of traditional CDI components to reduce the same ion effect, provide channels for ion migration, and reduce migration. Diffusion resistance, thereby improving the desalination effi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469C02F1/42
CPCC02F1/42C02F1/4691
Inventor 沈敏王秋泽朱鹏飞翟夏哲陈亚云
Owner JIANGSU MAYMUSE ENVIRONMENTAL TECH CO LTD
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