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: 2012-06-06
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 implementation mode 1: In this embodiment, the organic-inorganic hybrid strongly basic anion exchange membrane consists of 5.0% to 30% polyvinylidene fluoride, 1% to 20% polyetheretherketone, 0.5% to 20% polyvinylidene fluoride, and 0.5% to 20% Divinylbenzene, 1%-20% ethyl styrene, 1%-10% dimethyl phthalate, 20%-80% organic solvent, 0.01%-4.0% nano-alumina particles , 1.0%~45% glycidyl methacrylate and 0.05%~2.0% benzoyl peroxide; the organic solvents are N,N-dimethylacetamide, N,N-dimethylformamide amide or dimethyl sulfoxide.

specific Embodiment approach 2

[0009] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the organic-inorganic hybrid strongly basic anion exchange membrane consists of 10% polyvinylidene fluoride, 8% polyether ether ketone, and 9% di Vinyl benzene, 9% ethyl styrene, 4% dimethyl phthalate, 32% organic solvent, 2.0% nano aluminum oxide particles, 25% glycidyl methacrylate and 1.0% Made from benzoyl peroxide; wherein the organic solvent is N, N-dimethylacetamide, N, N-dimethylformamide or dimethyl sulfoxide. Others are the same as in the first embodiment.

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

specific Embodiment approach 3

[0011] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the average particle diameter of the nano-alumina particles is 5 nm to 100 nm. Others are the same as in 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 present invention relates to an ion exchange membrane and its preparation method. Background technique [0002] The ion exchange membrane is a key component of the electrodialyzer. Since the anion exchange membrane is more complicated and difficult to prepare than the cation, and it is most likely to be contaminated by precipitation corrosion and organic substances during the electrodialysis process, it directly affects the life of the desalinator. Therefore, it is of special and important significance to carry out the development of anion exchange membranes. [0003] At present, the preparation of anion exchange membranes 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 methylene The secondary crosslinking of the bridge is generated, resulting in poor product performance, such as ion selecti...

Claims

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Application Information

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Patent Type & Authority Patents(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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