Ionic conductive separator plate, production method thereof, and electrodialysis reversal device

A technology of inverted electrodialysis and ion conduction, applied in the field of inverted electrodialysis devices

Inactive Publication Date: 2018-07-20
BL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this type of plastic mesh is non-polar and dense, with a smooth surface and large open cells (typically 2 x 2 millimeters (mm) in size), applying a stable and uniform coating to the plastic mesh without Not clogging the grid is a big challenge

Method used

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  • Ionic conductive separator plate, production method thereof, and electrodialysis reversal device
  • Ionic conductive separator plate, production method thereof, and electrodialysis reversal device
  • Ionic conductive separator plate, production method thereof, and electrodialysis reversal device

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specific Embodiment approach 1

[0054] In some embodiments, the polymeric coatings of the present invention can include sulfonated block copolymers. The sulfonated block copolymer includes sulfonic acid groups in one block in a sufficient amount to form a macroscopically continuous microphase.

[0055] Examples of such sulfonated block copolymers may include, for example, but are not limited to, sulfonated poly(styrene-b-ethylene-r-butylene-b-styrene) (sulfonated poly(styrene-b-ethylene- r-butylene-b-styrene), S-SEBS) triblock copolymer, polystyrene poly(styrene-b-isobutylene-b-styrene) (polystyrene poly(styrene-b-isobutylene-b-styrene) , S-SIBS), poly((dicyclopentadieneethylstyrene-s-styrene)-b-(n-propyl-p-styrenesulfonate)) (poly((norbornenyethylstyrene-s-styrene )-b-(n-propyl-p-styrenesulfonate)), PNS-PSSP), or poly(t-butylstyrene-b-hydrogenated isoprene-b-sulfonated styrene-b-hydrogenated isoprene Diene-b-t-butylstyrene) (poly(t-butylstyrene-b-hydrogenated disoprene-b-sulfonated styrene-b-hydrogenated ...

example 1

[0056] Example 1: Sulfonated Pentablock Copolymer Coating

[0057] A sulfonated pentablock copolymer supplied by Kraton Polymers LLC, poly(t-butylstyrene-b-hydrogenated isoprene-b-sulfonated styrene-b-hydrogenated isoprene Diene-b-t-butylstyrene) was dissolved in the solvent. The solvent used was a mixture of cyclohexane and heptane. Therefore, a sulfonated pentablock copolymer solution was prepared and then coated onto a PP web. The coated separator is called Kraton coated PP separator.

[0058] Please refer to Journal of Membrane Science (Journal of Membrane Science) 2012, 169-174, 394-395, J.H.Choi, C.L.Willis and K.I.Winey studied the self-assembled morphology of this pentablock copolymer thin film. When the IEC is 2.0meq / g polymer, the middle segment of sulfonated styrene forms a bicontinuous phase, but when the IEC decreases, the microphase structure of the sulfonated polymer becomes discontinuous. When this pentablock copolymer was coated onto PP mesh, it was obse...

specific Embodiment approach 2

[0064] In some embodiments, the polymeric coatings of the present invention may include fluorinated polymers having sulfonic acid groups in the side chains.

[0065]Fluorinated polymers can include, for example, but are not limited to, copolymers of tetrafluoroethylene and perfluoro(alkyl vinyl ether) with sulfonyl fluoride, or α,β,β-trifluoroethylene Sulfonated polymer of fluorostyrene.

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PUM

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Abstract

The invention discloses an ionic conductive separator plate applied to an electrodialysis reversal device. The ionic conductive separator plate comprises a plastic net and a polymer coating layer applied to the plastic net. The polymer coating layer contains a charged group, the form of the polymer coating layer has interconnected ion clusters, and interconnected ion clusters allow ions to be macroscopically continuously transported through the surface of the plastic net. The invention also discloses the electrodialysis reversal device using the ionic conductive separator plate, and a production method of the ionic conductive separator plate.

Description

technical field [0001] The present invention generally relates to the field of membrane separators, and in particular to an ion-conductive separator applied to an electrodialysis (ElectroDialysis Reversal, EDR) device, a method for preparing the ion-conductive separator and the use of the ion-conductive separator Inverted electrode electrodialysis unit. Background technique [0002] The ion-conductive separator is a functionalized membrane separator, which is often used in electrochemical desalination products such as electrodialysis, inverted electrodialysis and reverse osmosis liquid separation equipment. Often, coating methods are required to attach certain materials to membrane separators. Ionically conductive separators can help reduce electrical resistance, thus improving salt rejection. However, ionically conductive separators are subject to harsh environments such as acidic / corrosive / oxidizing chemicals and physical cleaning during their 5-10 years of service life....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/46B01D61/48
CPCB01D61/46B01D61/48B01D61/42C02F1/4693H01M8/1023H01M8/1041H01M8/1081H01M8/1086H01M8/227B01D2313/14Y02P70/50B01D61/422B01D61/52B01J47/12
Inventor 路微董红晨夏激扬郑永昌吕苏拉塞尔·麦克唐纳约翰·巴伯
Owner BL TECH INC
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