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Method for preparing ion exchange membrane

A technology of ion-exchange membranes and membranes, which is applied in the field of preparation of ion-exchange membranes. It can solve the problems of uneven heating of membranes, large investment in equipment and equipment, high safety and technical requirements, and achieve uniform membrane thickness, fast production speed, and low technical difficulty. Effect

Active Publication Date: 2016-06-01
HANGZHOU IONTECH ENVIRONMENTAL TECH
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Problems solved by technology

[0007] The present invention provides a preparation method of an ion exchange membrane, which mainly solves the difficulty in controlling the thickness of the film in the prior art, uneven heating of the film, easy occurrence of discoloration or even degradation of the film due to excessive heating, or the need to use a radiation source , high safety and technical requirements, large investment in equipment and other technical issues

Method used

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Embodiment 1

[0027] Embodiment 1: the preparation method of a kind of ion exchange membrane of this example, its step is: adopt 65 weight parts acrylic acid, 5 weight parts divinylbenzene, 9 weight parts 2,4,6-trimethylbenzoyl diphenyl Phosphine oxide, 3 parts by weight of ethylene-propylene rubber, 8 parts by weight of chlorinated polyethylene, and 10 parts by weight of terpene resin. After the polymerization inhibitor is removed from the above raw materials, they are mixed evenly in the dark, left to stand for defoaming, and put into flat plate molding device, such as figure 1 , The molding device includes two symmetrically arranged molding boards 1, the outer surface of the lower end of the molding board shrinks into an inclined plane 2, and a gap for feeding materials is formed between the two molding boards. The mixed material flows out under pressure through the narrow gap of the device. The gap between the narrow gaps is 0.5mm. After the material flows out, it enters the ultraviolet...

Embodiment 2

[0028] Embodiment 2: the preparation method of a kind of ion exchange membrane of this example, its step is: adopt 60 parts by weight styrene, 5 parts by weight divinylbenzene, 5 parts by weight 2,4,6-trimethylbenzoyl di Phenylphosphine oxide, 15 parts by weight of linear low-density polyethylene, 10 parts by weight of ethylene-propylene rubber, and 5 parts by weight of styrene-butadiene-styrene block copolymer, after removing the polymerization inhibitor, the above raw materials are mixed in the dark Evenly, let it stand for degassing, and put it into a ring-shaped molding device, such as figure 2 , the molding device includes an outer tube 3 and an inner tube 4, the diameters of the outer tube and the inner tube gradually decrease from top to bottom, there is a gap for feeding materials between the outer tube and the inner tube, and there is a gap inside the inner tube A hole through which gas can pass. The mixed material passes through the narrow gap of the device, with a...

Embodiment 3

[0029] Embodiment 3: the preparation method of a kind of ion exchange membrane of this example, its step is: adopt 60 weight parts glycidyl methacrylate, 10 weight parts divinylbenzene, 8 weight parts benzoin ethyl ether, 8 weight parts Linear low-density polyethylene, 8 parts by weight of styrene-butadiene rubber, 6 parts by weight of ethylene dichloride, and the above raw materials are removed from the polymerization inhibitor, mixed evenly in the dark, and packed into a flat-plate molding device, such as figure 1, The molding device includes two symmetrically arranged molding boards 1, the outer surface of the lower end of the molding board shrinks into an inclined plane 2, and a gap for feeding materials is formed between the two molding boards. The mixed material flows out under pressure through the narrow gap of the device. The distance between the narrow gaps is 0.5mm. After the material flows out, it enters the ultraviolet light area immediately. The light time is 5 sec...

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Abstract

The invention relates to a method for preparing an ion exchange membrane, in particular to the method for preparing the ion exchange membrane. The invention mainly solves the technical problems of difficulty in controlling membrane thickness, non-uniformity of membrane heating, and easiness in occurrence of color change even degradation due to overheating of the membrane, or higher safety and technical requirements and larger equipment investment due to necessary utilization of a radiation source in the prior art. The method disclosed by the invention comprises the following steps of firstly preparing a photocurable material, preparing the material into a membrane shape by utilization of a forming device, then curing the material under an ultraviolet light source for a certain period of time so as to initiate polymerization and crosslinking of the material, and obtaining an cation exchange membrane through after-treatment or sulfonation, or obtaining an anion exchange membrane through the after-treatment or amination.

Description

technical field [0001] The invention relates to a preparation method of an ion exchange membrane, in particular to a preparation method of an ion exchange membrane. Background technique [0002] The ion exchange membrane is a polymer membrane containing ionic groups and has the ability to selectively permeate the ions in the solution. Because its ion selective permeability is generally used in application, it is also called ion selective permeability membrane. [0003] Since Judaw successfully trial-produced anion and cation exchange membranes with high selective permeability in 1950, ion exchange membrane technology has developed rapidly. The ion exchange membrane is widely used in medicine, wastewater treatment, food industry, nonferrous metallurgy, etc. [0004] According to the type classification of selective permeation examples, ion exchange membranes can be divided into: cation exchange membranes and anion exchange membranes. In the cation exchange membrane, there ...

Claims

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Application Information

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IPC IPC(8): B01D71/82B01D67/00B01D69/02
CPCB01D67/0016B01D69/02B01D71/82B01D2323/345B01D2325/04B01D2325/26B01D2325/42
Inventor 陈良贺炜王炳辉
Owner HANGZHOU IONTECH ENVIRONMENTAL TECH
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