The effect of reinforcing fabric on ion exchange membrane properties under cyclic pH changes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F20%3AN0000001" target="_blank" >RIV/28676092:_____/20:N0000001 - isvavai.cz</a>

Výsledek na webu

<a href="http://vat.ft.tul.cz/2020/1/VaT_2020_1_5.pdf" target="_blank" >http://vat.ft.tul.cz/2020/1/VaT_2020_1_5.pdf</a>

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of reinforcing fabric on ion exchange membrane properties under cyclic pH changes

Popis výsledku v původním jazyce

The article deals with comparison of the influence of ion exchange membranes (IMs) composition on their dimensional changes and electrochemical properties. Mainly the influence of chemical stability of polyester (PES) or poly(phenylene sulfide) (PPS) reinforcing fabric was investigated. These fabrics were made from fibers of the same thickness and had the same construction of warp and weft. IMs were exposed to cyclic pH changes which were realized by alternately soaking in HCl and NaOH solutions of concentration 1 mol L−1 for 24 hours. Overall, IMs spent 9 days in each solution. Dimensions, weight, ion exchange capacity and area resistance of IMs were continuously evaluated. Reinforcing with PPS fabric led to length and height stabilization of IMs as compared with reinforcing by PES fabric. Moreover membranes reinforced with PPS fabric showed the highest ion exchange capacity and stable area resistance (7.4 ± 0.5 Ω cm2 or 6.3 ± 0.1 Ω cm2 for anion or cation exchange membrane, respectively) during the testing period. Contrary, IMs reinforced with PES fabric showed gradual decrease of area resistance corresponding to increased swelling. The sharpest decrease in area resistance was observed for IM(H)-PES Ralex, from 11.6 Ω cm2 to 3.5 Ω cm2 for anion exchange membrane and from 6.1 Ω cm2 to 3.5 Ω cm2 for cation exchange membrane. It was proved that by minimizing the dimensional changes of IMs longer stability of area resistance and ion exchange capacity was obtained.

Název v anglickém jazyce

The effect of reinforcing fabric on ion exchange membrane properties under cyclic pH changes

Popis výsledku anglicky

The article deals with comparison of the influence of ion exchange membranes (IMs) composition on their dimensional changes and electrochemical properties. Mainly the influence of chemical stability of polyester (PES) or poly(phenylene sulfide) (PPS) reinforcing fabric was investigated. These fabrics were made from fibers of the same thickness and had the same construction of warp and weft. IMs were exposed to cyclic pH changes which were realized by alternately soaking in HCl and NaOH solutions of concentration 1 mol L−1 for 24 hours. Overall, IMs spent 9 days in each solution. Dimensions, weight, ion exchange capacity and area resistance of IMs were continuously evaluated. Reinforcing with PPS fabric led to length and height stabilization of IMs as compared with reinforcing by PES fabric. Moreover membranes reinforced with PPS fabric showed the highest ion exchange capacity and stable area resistance (7.4 ± 0.5 Ω cm2 or 6.3 ± 0.1 Ω cm2 for anion or cation exchange membrane, respectively) during the testing period. Contrary, IMs reinforced with PES fabric showed gradual decrease of area resistance corresponding to increased swelling. The sharpest decrease in area resistance was observed for IM(H)-PES Ralex, from 11.6 Ω cm2 to 3.5 Ω cm2 for anion exchange membrane and from 6.1 Ω cm2 to 3.5 Ω cm2 for cation exchange membrane. It was proved that by minimizing the dimensional changes of IMs longer stability of area resistance and ion exchange capacity was obtained.

Druh

J_ost - Ostatní články v recenzovaných periodicích

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

2020

Kód důvěrnosti údajů

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

Název periodika

Vlákna a textil

ISSN

1335-0617

e-ISSN

2585-8890

Svazek periodika

neuveden

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

6

Strana od-do

1-6

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—