The influence of temperature and cyclic pH changes on membranes geometry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F19%3AN0000109" target="_blank" >RIV/28676092:_____/19:N0000109 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.czemp.cz/cs/workshop-students-presentation-fulltexts/wsp-2019-fulltexty" target="_blank" >http://www.czemp.cz/cs/workshop-students-presentation-fulltexts/wsp-2019-fulltexty</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The influence of temperature and cyclic pH changes on membranes geometry

Popis výsledku v původním jazyce

In this work seven types of ion exchange membranes (IEMs) developed in MemBrain were repeatedly exhibited to cyclic changes of pH by swelling in hydrochloric acid and sodium hydroxide of concentration 1 mol L−1. Swelling induced dimensional and weight changes of IEMs in demineralized water at different temperatures were also evaluated. Chosen IEMs were made from strong base anion or strong acid cation exchange resins and polymer binders based on linear low density polyethylene (LLDPE). Textiles used for IEMs reinforcing were made of polyester or polyphenylene sulfide. Dimensional and weight changes caused by repeated changes of membranes ionic form or increasing temperature were determined. From the data obtained for temperature changes we observed that the weight and thickness were increasing steadily, both courses showed negligible deviations. Length and width doesn’t seem to be much affected by temperature and remained almost same even at 80 °C which is a result of reinforcement that intensify IEMs swelling in the thickness direction. From the data of cyclic pH changes we observed that IM-PES TR I are the least resistant against pH changes from which cation exchange membrane (CM) is a bit more resistant than the corresponding anion exchange membrane because CM doesn’t allow OH− ions to penetrate through and so attack the textile. However, stabilization of IEMs against their dimensional changes under pH changes was significantly improved using polyphenylene sulfide textile or polyester textile of 2.5 times higher thickness.

Název v anglickém jazyce

The influence of temperature and cyclic pH changes on membranes geometry

Popis výsledku anglicky

In this work seven types of ion exchange membranes (IEMs) developed in MemBrain were repeatedly exhibited to cyclic changes of pH by swelling in hydrochloric acid and sodium hydroxide of concentration 1 mol L−1. Swelling induced dimensional and weight changes of IEMs in demineralized water at different temperatures were also evaluated. Chosen IEMs were made from strong base anion or strong acid cation exchange resins and polymer binders based on linear low density polyethylene (LLDPE). Textiles used for IEMs reinforcing were made of polyester or polyphenylene sulfide. Dimensional and weight changes caused by repeated changes of membranes ionic form or increasing temperature were determined. From the data obtained for temperature changes we observed that the weight and thickness were increasing steadily, both courses showed negligible deviations. Length and width doesn’t seem to be much affected by temperature and remained almost same even at 80 °C which is a result of reinforcement that intensify IEMs swelling in the thickness direction. From the data of cyclic pH changes we observed that IM-PES TR I are the least resistant against pH changes from which cation exchange membrane (CM) is a bit more resistant than the corresponding anion exchange membrane because CM doesn’t allow OH− ions to penetrate through and so attack the textile. However, stabilization of IEMs against their dimensional changes under pH changes was significantly improved using polyphenylene sulfide textile or polyester textile of 2.5 times higher thickness.

Druh

D - Stať ve sborníku

CEP obor

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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

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Workshop of Students´ Presentations 2019

ISBN

978-80-906831-9-8

ISSN

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e-ISSN

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Počet stran výsledku

1

Strana od-do

29

Název nakladatele

Czech Membrane Platform

Místo vydání

Česká Lípa

Místo konání akce

Stráž pod Ralskem

Datum konání akce

16. 10. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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