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A kind of manufacture method of cation exchange alloy membrane

A technology of cation exchange and manufacturing method, applied in the field of functional polymer film processing, can solve the problems of difficult swelling behavior, insufficient reinforcement effect, easy adhesion of pollutants, etc., and achieve the effect of improving anti-swelling performance, improving transformation and increasing plasticity

Active Publication Date: 2020-12-01
QUZHOU LANRAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the reinforcement effect of the mesh is not enough, and it is difficult to really limit the swelling behavior of the membrane in the environment of strong acid or strong alkali solution; anti-pollution ability
The result is: this type of semi-homogeneous membrane is the same as the heterogeneous membrane, it is still difficult to use for a long time under strong acid and strong alkaline environment, especially it cannot be used in strong acid (such as hydrochloric acid) and strong alkali for a long time after being installed in the electrodialysis unit (such as sodium hydroxide) removal or concentration

Method used

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  • A kind of manufacture method of cation exchange alloy membrane
  • A kind of manufacture method of cation exchange alloy membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021]Preparation of raw materials: 1) Thermoplastic strong acid resin powder (polyethylene-sulfonated polystyrene strong acid cation exchange resin powder): It can be prepared by referring to the method described in the literature (China Invention Patent Application No. 201510570174.6). Provided by Seoul Environmental Protection Technology Co., Ltd. (particle size below 50 mesh, cation exchange capacity of 2.58mmol / g dry basis). 2) Non-thermoplastic weak base resin powder: epoxy series weak base anion exchange resin (particle size range 0.325-1.25mm, anion exchange capacity 7.5mmol / g dry basis, model 335, manufactured by Shanghai Huazhen Customized by Technology Co., Ltd.), soaked in 4% hydrochloric acid, washed with water until neutral, that is, converted to chlorine form, and dried to constant weight at 60-70°C; first crushed with a jet mill until it can pass through a 100-mesh stainless steel screen, Grinding with a ball mill for 6 hours; sampling analysis, measured by las...

Embodiment 2

[0025] With the model in embodiment 1 being 335 epoxy series weak base resins, change the model into the acrylic series weak base resins of D315 (the particle size range is 0.325~1.25mm, anion exchange capacity is 6.5mmol / g, by Shanghai Hua Zhen Technology Co., Ltd. customization); the model is the polyester mesh of DPP12S, change the model to be the polyester mesh of DPP20S (purchasing from Shanghai Xintie Chain Screen Mesh Manufacturing Co., Ltd); all the other raw materials and proportioning are compared with embodiment 1 unchanged (see Table 1 for details). According to the same alloy film manufacturing process as described in Example 1, a prefabricated diaphragm with a thickness of 0.12 mm was firstly prepared, and an alloy film product with a thickness of 0.30 mm was obtained after hot pressing.

[0026] With reference to the measurement method described in the industry standard, the performance test data of the obtained membrane product are listed in Table 2, and the co...

Embodiment 3

[0028] The model in embodiment 1 is the epoxy series weak base resin of 335, changes the model into the styrene series weak base resin of 301 (the particle diameter scope is 0.325~1.25mm, and anion exchange capacity is 5.2mmol / g, by Shanghai Customized by Huazhen Science and Technology Co., Ltd.); "2.4 kilograms of non-thermoplastic weak base resin powder, 3.6 kilograms of polyethylene powder, and 3 kilograms of polyisobutylene powder" in Example 1 are replaced with "1.5 kilograms of non-thermoplastic (301 ) Weak base resin powder, 4.5 kg polyethylene powder, 1.5 kg polyisobutylene powder". The remaining raw materials and alloy film manufacturing process are unchanged compared with Example 1 (see Table 1 for details). Firstly, a prefabricated diaphragm with a thickness of 0.18 mm is prepared, and an alloy film product with a thickness of 0.41 mm is obtained after hot pressing.

[0029] With reference to the measurement method described in the industry standard, the performance...

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Abstract

The invention provides a production method of a cation exchange alloy film. The production method comprises the following steps: firstly, mixing thermoplastic polyethylene-sulfonated polystyrene strongly acidic cation exchange resin powder, non-thermoplastic micron-grade weakly acidic cation exchange resin powder (or non-thermoplastic micron-grade weakly alkaline anion exchange resin powder), polyethylene powder and polyisobutene powder; then carrying out internal mixing, open mixing and sheeting, continuous calendering, cooling and cutting to obtain a single prefabricated film sheet; finally,clamping one piece of enhanced mesh cloth by utilizing two pieces of the prefabricated film sheets; carrying out hot pressing to obtain a cation exchange alloy film product. The film has a smooth surface and a strong anti-pollution capability; a thermoplastic component and a non-thermoplastic component form a starry-sky-type high molecular alloy structure and the resistance of the film is low; the enhanced mesh cloth limits the swelling of the film in a strongly acidic or strongly alkaline solution and an inner structure is dense. The cation exchange alloy film provided by the invention is especially suitable for electroosmosis application occasions under a strongly acidic or strongly alkaline solution environment.

Description

technical field [0001] The invention belongs to the technical field of functional polymer film processing, and particularly relates to a kind of reinforced mesh inlaid in the middle, the main film material is a "starry sky" polymer alloy structure, so it can meet the requirements of long-term electricity in the environment of strong acid and strong alkali solution. A method for manufacturing a cation exchange membrane used in a dialysis unit. Background technique [0002] Ion exchange membranes are widely used in the desalination of brackish water based on electrodialysis technology, salt production from seawater concentration, special separation and desalination of food, desalination of industrial wastewater, acid / alkali recovery, etc. In the past, heterogeneous membranes formed by mixing non-thermoplastic ion exchange resin powder and binders such as polyethylene and then pressing the surface with reinforcing mesh, because the manufacturing process is very simple and the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/48B01D67/00B01D69/02B01D71/28B01J39/19
CPCB01D61/485B01D67/0002B01D67/0027B01D69/02B01D71/28B01D2325/42B01J39/19
Inventor 雷引林李南文卿波
Owner QUZHOU LANRAN NEW MATERIAL CO LTD
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