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Preparation method and application of chlorosulfonated polyethylene-based cation exchange membrane for diffusion dialysis

A chlorosulfonated polyethylene and cation exchange membrane technology, applied in the field of membrane separation, can solve the problems of limited cation exchange membrane separation and recovery applications, single type of cation exchange membrane, strict requirements on stability and separation performance, etc. performance, good film formation, high selectivity

Active Publication Date: 2019-02-15
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the strict requirements on the stability and separation performance of the membrane in the recovery process of spent alkali, the types of cation exchange membranes are relatively single, which limits the application of cation exchange membranes in the separation and recovery of spent alkali. Therefore, more and more attention is focused on In the optimization and modification of existing membrane materials and the development and utilization of new membrane substrates

Method used

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  • Preparation method and application of chlorosulfonated polyethylene-based cation exchange membrane for diffusion dialysis
  • Preparation method and application of chlorosulfonated polyethylene-based cation exchange membrane for diffusion dialysis
  • Preparation method and application of chlorosulfonated polyethylene-based cation exchange membrane for diffusion dialysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Preparation of chlorosulfonated polyethylene-based cation exchange membrane

[0026] Pour 4g of chlorosulfonated polyethylene rubber and 80mL of toluene solution into a 100mL three-necked flask and raise the temperature to 80°C, swell and stir until completely dissolved, add 2g of methacrylic acid and 0.006g of triacryl isocyanurate mixed liquid, Stir at 80°C, blow nitrogen for 20 minutes; add 0.02g initiator azobisisobutyronitrile dissolved in 5mL toluene solution, initiate polymerization for 5 hours, stir and cool to room temperature, add 0.2g dipentylthiuram tetrasulfide, After stirring for 20 minutes, it was poured onto a horizontal glass plate, and the solvent was naturally volatilized in a fume hood to form a film; it was hot-pressed in a vulcanizing machine at 185°C and 10 MPa for 10 minutes to obtain the final required chlorosulfonated polyethylene-based cation exchange membrane.

[0027] 2. Performance test

[0028] Chlorosulfonated polyethylene-based catio...

Embodiment 2

[0033] The preparation method and performance testing method of the film in this example are the same as those in Example 1, except that the addition amount of the crosslinking agent tripropenyl isocyanurate (TAIC) in this example is 0.01 g.

[0034] After testing, the performance parameters of the cationic membrane obtained in this embodiment are: the permeability coefficient (U OH ) is 0.0209m / h, the permeability coefficient of tungstate (U W ) is 0.000508m / h, the separation coefficient (S) is 41.0; the water content of the membrane (W R ) is 46.7%.

Embodiment 3

[0036] The preparation method and performance testing method of the film in this example are the same as those in Example 1, except that the addition amount of the crosslinking agent tripropenyl isocyanurate (TAIC) in this example is 0.014 g.

[0037] After testing, the performance parameters of the cationic membrane obtained in this embodiment are: the permeability coefficient (U OH ) is 0.0185m / h, the permeability coefficient of tungstate (U W ) is 0.000443m / h, the separation coefficient (S) is 41.8; the water content of the membrane (W R ) is 46.4%.

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Abstract

The invention discloses a preparation method and application of a chlorosulfonated polyethylene-based cation exchange membrane for diffusion dialysis. The preparation method comprises the following steps: firstly, dissolving linear chlorosulfonated polyethylene in methylbenzene, sequentially adding a functional monomer, a crosslinking agent and an initiator, and polymerizing to form membrane liquid adopting a semi-interpenetrating network structure; cooling, then adding a vulcanizing agent, drying to form a membrane, and finally forming an interpenetrating network structure in a membrane matrix through the vulcanizing process. The cation exchange membrane prepared according to the preparation method provided by the invention has the hydroxide permeability coefficient (UOH) of 0.013-0.021 m / h, the separation factor of 36.8-45.7 and the water content of 43.0-51.6%. Through simple change of the using amount of the crosslinking agent, the micro-phase structure of the functional monomer inthe chlorosulfonated polyethylene matrix is regulated, so that the purpose of regulating the microstructure and the separation performance of the membrane is achieved, and the cation exchange membranewith high ion flux and selectivity is obtained.

Description

technical field [0001] The invention relates to a preparation method and application of a chlorosulfonated polyethylene-based cation exchange membrane for diffusion dialysis, belonging to the technical field of membrane separation. Background technique [0002] With the development of modern science and technology, industrial production, such as papermaking, electrolytic salt, steel manufacturing and electroplating, produces a large amount of heavy metal-polluted waste alkali with complex components. If these waste alkalis are discharged directly, they will not only damage the environment but also endanger human health; membrane separation as A low-energy and environmentally friendly method has become an indispensable technology for the separation and recovery of waste alkali. At present, due to the strict requirements on the stability and separation performance of the membrane in the recovery process of spent alkali, the types of cation exchange membranes are relatively sin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/26B01D67/00B01D61/24
CPCB01D61/243B01D67/0006B01D71/26B01D2325/42
Inventor 苗继斌彭李珍梁玉霞钱家盛夏茹陈鹏杨斌曹明苏丽芬郑争志伍斌葛倩倩
Owner ANHUI UNIVERSITY
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