Modification of the composition of ion exchange membranes for applications at high temperature electrodialysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F18%3AN0000079" target="_blank" >RIV/28676092:_____/18:N0000079 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.czemp.cz/cs/protected-node?destination=node/1795&back=http%253A%252F%252Fwww.czemp.cz%252Fcs&protected_page=1795" target="_blank" >http://www.czemp.cz/cs/protected-node?destination=node/1795&back=http%253A%252F%252Fwww.czemp.cz%252Fcs&protected_page=1795</a>

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Modification of the composition of ion exchange membranes for applications at high temperature electrodialysis

Popis výsledku v původním jazyce

The present work is focused on the study of ion exchange membranes (IEM), which can be used in high temperature electrodialysis. Various anion-exchange (AEM) and cation exchange membranes (CEMs) were prepared and their physicochemical properties evaluated. First, the rheological properties of the polymeric binder at different frequencies were studied to gather information about its processability under extrusion conditions and to investigate the structural mechanisms present in the polymer melt. Secondly, commercial anion (SGA550) and cation (SGC650, SGC100x10) exchange resins, with higher content of cross-linking by divinylbenzene, were characterized and compared to the standard cation and anion exchange resins used for production of heterogeneous IEMs in MEGA a. s. (Czech Republic). Finally, membrane sheets were produced using these ion exchange resins and their performance were compared with standard IEMs, by measuring the swelling degree, ion-exchange capacity, permselectivity and electrochemical resistance. Despite increased electrochemical resistance of AEM from SGA550 (10.5 Ω cm2), CEMs from SGC650 and SGC100x10 showed desirable results, 6.07 and 5.74 Ω cm2, respectively. The increase in the divinylbenzene content leads to higher resistance values compared to conventional resins due to the reduction in ion exchange capacity of the resins together with their lower swelling. The obtained data indicate that the prepared IEMs can be potentially applied for electrodialysis at elevated temperatures, as they can be beneficial in the view of longer term mechanical and chemical resistance due to their lower water content. Accordingly, this work is also a starting point for further studies in modification of composition of ion exchange membrane for use at high temperature electrodialysis.

Název v anglickém jazyce

Modification of the composition of ion exchange membranes for applications at high temperature electrodialysis

Popis výsledku anglicky

The present work is focused on the study of ion exchange membranes (IEM), which can be used in high temperature electrodialysis. Various anion-exchange (AEM) and cation exchange membranes (CEMs) were prepared and their physicochemical properties evaluated. First, the rheological properties of the polymeric binder at different frequencies were studied to gather information about its processability under extrusion conditions and to investigate the structural mechanisms present in the polymer melt. Secondly, commercial anion (SGA550) and cation (SGC650, SGC100x10) exchange resins, with higher content of cross-linking by divinylbenzene, were characterized and compared to the standard cation and anion exchange resins used for production of heterogeneous IEMs in MEGA a. s. (Czech Republic). Finally, membrane sheets were produced using these ion exchange resins and their performance were compared with standard IEMs, by measuring the swelling degree, ion-exchange capacity, permselectivity and electrochemical resistance. Despite increased electrochemical resistance of AEM from SGA550 (10.5 Ω cm2), CEMs from SGC650 and SGC100x10 showed desirable results, 6.07 and 5.74 Ω cm2, respectively. The increase in the divinylbenzene content leads to higher resistance values compared to conventional resins due to the reduction in ion exchange capacity of the resins together with their lower swelling. The obtained data indicate that the prepared IEMs can be potentially applied for electrodialysis at elevated temperatures, as they can be beneficial in the view of longer term mechanical and chemical resistance due to their lower water content. Accordingly, this work is also a starting point for further studies in modification of composition of ion exchange membrane for use at high temperature electrodialysis.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

<a href="/cs/project/LO1418" target="_blank" >LO1418: Progresivní rozvoj Membránového inovačního centra</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Workshop of Students´ Presentations 2018

ISBN

978-80-906831-3-6

ISSN

—

e-ISSN

—

Počet stran výsledku

12

Strana od-do

36-37

Název nakladatele

Czech Membrane Platform

Místo vydání

Česká Lípa

Místo konání akce

Česká Lípa

Datum konání akce

24. 10. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—