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Preparation method of bipolar membrane

A bipolar membrane, base membrane technology, applied in chemical instruments and methods, membrane, membrane technology, etc., can solve the problems of high professional requirements of technicians, high energy consumption of preparation process, harsh preparation conditions, etc., to accelerate water dissociation. The effect of speed, simple preparation process and low professionalism requirements

Inactive Publication Date: 2020-03-27
陕西易莱德新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing bipolar membranes, which solves the complex preparation process, harsh preparation conditions, high energy consumption and high cost of the entire preparation process in the prior art, and requires high professionalism of technicians. The problem

Method used

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Embodiment Construction

[0018] A kind of preparation method of bipolar membrane of the present invention, comprises the steps:

[0019] Step 1. Preparation of oxide coating solution: Weigh CoAl-MMO, ZnAl-MMO, ZnFe-MMO and CoCr-MMO and disperse them in an organic solvent, heat to 50-60°C, stir and sterilize at high temperature to obtain oxides coating liquid;

[0020] Step 2. Preparation of cation exchange membrane: select polyetherketone membrane as the base membrane, perform surface activation, and then impregnate styrene, and perform polymerization reaction at a high temperature of 150°C-180°C; weigh sodium carboxymethylcellulose Or sodium alginate, prepared into CMC aqueous solution or SA aqueous solution; take another polypropylene alcohol, add 60% ethanol solution to heat and stir to dissolve, add to the CMC aqueous solution or SA aqueous solution prepared above, stir evenly, and obtain PVA-SA aqueous solution or PVA-CMC aqueous solution; adding the oxide coating solution obtained in step 1 int...

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Abstract

The invention discloses a preparation method of a bipolar membrane. The method comprises the following steps: 1, preparing an oxide coating liquid: weighing an oxide, dispersing the oxide in an organic solvent, heating and stirring the oxide and the organic solvent, and carrying out high-temperature sterilization to obtain the oxide coating liquid; 2, preparing a cation exchange membrane: selecting a polyetherketone membrane as a base membrane, taking polypropylene glycol, adding the polypropylene glycol into an aqueous CMC solution or an aqueous SA solution to obtain an aqueous PVA-SA solution or an aqueous PVA-CMC solution, adding the oxide coating solution, performing stirring and mixing, and spin-coating the surface of the base membrane of the cation exchange membrane with the obtainedsolution; 3, preparing an anion exchange membrane: taking a mixture as a base membrane base material of the anion exchange membrane, adding glutaraldehyde to prepare a viscous membrane solution, tape-casting the other side of the cation exchange membrane base membrane with the viscous membrane solution through a tape casting technology, drying the coated base membrane, and spin-coating the surface of the anion exchange membrane base membrane with the oxide coating liquid to prepare the bipolar membrane; and 4, washing the bipolar membrane with water for several times, and then soaking the bipolar membrane in a hydrogen peroxide solution for 20-25 hours.

Description

technical field [0001] The invention belongs to the technical field of bipolar membranes, and relates to a preparation method of bipolar membranes. Background technique [0002] The bipolar membrane is a negative and positive composite membrane made of a positive membrane and a negative membrane. Under the action of a direct current electric field, the H2O between the composite layers of the negative and positive membranes dissociates into H+ and OH- and Through the negative membrane and the positive membrane respectively, as the source of H+ and OH- ions, the bipolar membrane can be divided into a homogeneous bipolar membrane and a heterogeneous bipolar membrane according to the macroscopic membrane structure. Due to the excellent performance of the bipolar membrane, it has been Widely used in acid and alkali production, sewage treatment, organic synthesis and other fields. [0003] The water dissociation efficiency of the middle interface layer of the bipolar membrane is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/44B01D67/00B01D69/12B01J43/00
CPCB01D61/445B01D67/0088B01D69/125B01D2323/50B01J43/00
Inventor 李金博
Owner 陕西易莱德新材料科技有限公司
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