The influence of temperature and cyclic pH changes on membranes geometry
The result's identifiers
Result code in 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>
Result on the web
<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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Alternative languages
Result language
angličtina
Original language name
The influence of temperature and cyclic pH changes on membranes geometry
Original language description
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.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)
Result continuities
Project
<a href="/en/project/LO1418" target="_blank" >LO1418: Progressive development of the Membrane Innovation Centre</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Workshop of Students´ Presentations 2019
ISBN
978-80-906831-9-8
ISSN
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e-ISSN
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Number of pages
1
Pages from-to
29
Publisher name
Czech Membrane Platform
Place of publication
Česká Lípa
Event location
Stráž pod Ralskem
Event date
Oct 16, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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