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Organic/inorganic hybridisation strong alkalinity anion exchange membrane and preparation method thereof

An anion exchange membrane, strong alkaline technology, applied in the field of ion exchange membrane and its preparation, can solve the problems of anion exchange membrane polluted environment, unsafe operation process, poor product performance, etc., to improve anti-pollution ability and improve mechanical properties , the effect of film resistance reduction

Inactive Publication Date: 2008-12-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of environmental pollution, unsafe operation process and poor product performance in the preparation of anion exchange membranes in the prior art, and provide organic-inorganic hybrid strong basic anion exchange membranes and a preparation method thereof

Method used

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specific Embodiment approach 1

[0008] Specific embodiment 1: The organic-inorganic hybrid strong basic anion exchange membrane of this embodiment is composed of 5.0%-30% polyvinylidene fluoride, 1%-20% polyether ether ketone, 0.5%-20% by weight. Divinylbenzene, 1%-20% ethyl styrene, 1%-10% dimethyl phthalate, 20%-80% organic solvent, 0.01%-4.0% nano aluminum oxide particles , 1.0% to 45% of glycidyl methacrylate and 0.05% to 2.0% of benzoyl peroxide; the organic solvent is N,N-dimethylacetamide, N,N-dimethylformaldehyde Amide or dimethyl sulfoxide.

specific Embodiment approach 2

[0009] Specific embodiment two: this embodiment is different from specific embodiment one in that the organic-inorganic hybrid strong basic anion exchange membrane is composed of 10% polyvinylidene fluoride, 8% polyether ether ketone, and 9% two Vinylbenzene, 9% ethyl styrene, 4% dimethyl phthalate, 32% organic solvent, 2.0% nano aluminum oxide particles, 25% glycidyl methacrylate and 1.0% The organic solvent is N,N-dimethylacetamide, N,N-dimethylformamide or dimethylsulfoxide. Others are the same as the first embodiment.

[0010] The molecular weight of polyvinylidene fluoride in this embodiment is 350,000 to 500,000 Daltons.

specific Embodiment approach 3

[0011] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the average particle size of the nano aluminum oxide particles is 5 nm-100 nm. Others are the same as the first or second embodiment.

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Abstract

The invention provides an organic-inorganic hybrid strong-basicity anion exchange membrane and a preparation method thereof, relating to the anion exchange membrane and the preparation method thereof. The anion exchange membrane and the preparation method solve the problems in the prior art for preparing the anion exchange membrane, such as environmental pollution, unsafe operation process and poor product performance. The organic-inorganic hybrid strong-basicity anion exchange membrane is prepared by polyvinylidene fluoride, polyether-ether-ketone, divinyl benzene, ethylstyrene, dimethyl phthalate, organic solvent, nanometer aluminium oxide particles, glyceryl methacrylate and benzoyl peroxide. The method comprises the following steps of: 1. weighing required compositions by weight percentage; 2. ultrasonically mixing the nanometer aluminium oxide particles with the organic solvent; 3. adding other compositions into the mixture to produce a casting solution; 4. preparing the membrane by the casting solution; and 5. immersing and rinsing the membrane, putting the membrane in an HCL solvent for immersing, and cleaning the membrane once more, thereby obtaining the organic-inorganic hybrid strong-basicity anion exchange membrane. The organic-inorganic hybrid strong-basicity anion exchange membrane and the preparation method thereof have the advantages of no environmental pollution, safe operation process and good product performance.

Description

Technical field [0001] The invention relates to an ion exchange membrane and a preparation method thereof. Background technique [0002] The ion exchange membrane is a key component of the electrodialysis device. Because the anion exchange membrane is more complicated and difficult to prepare than the cation, and it is most susceptible to precipitation corrosion and organic matter pollution during the electrodialysis process, which directly affects the life of the desalinator. Therefore, the development of anion exchange membranes is of special and important significance. [0003] At present, the preparation of anion exchange membrane adopts the process of "polymerization first-chloromethylation-reamination", but it has the following shortcomings that are difficult to overcome: (1) In the chloromethylation reaction, a large amount of methine The formation of secondary cross-linking of the bridge leads to poor product performance. For example, the ion selective permeability coeffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/78
Inventor 于水利左行涛许霞徐俊暴瑞玲王娟
Owner HARBIN INST OF TECH
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