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Title:Zeta potential determination of polymeric materials using two differently designed measuring cells of an electrokinetic analyzer
Authors:Bukšek, Hermina (Author)
Luxbacher, Thomas (Author)
Petrinić, Irena (Author)
Files:.pdf Acta_Chimica_Slovenica_2010_Buksek,_Luxbacher,_Petrinic_Zeta_potential_determination_of_polymeric_materials_using_two_differently_design.pdf (202,54 KB)
MD5: A4C2898786121877AF558AD5E687DBA4
 
URL http://acta-arhiv.chem-soc.si/57/57-3-700.pdf
 
Language:English
Work type:Scientific work (r2)
Typology:1.01 - Original Scientific Article
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:The so-called zeta potential can be determined through electrokinetic measurements and indicates the status regarding surface charges along the interface between solids and liquids. Surface charge gives us information about the condition, quality, and characteristics of a macroscopic surface in the polar medium. In our study the zeta potential was determined using a 'SurPASS' electrokinetic analyzer based on the streaming current and streaming potential measurements. The aim of the research was to compare the results of two differently designed measuring cells ('Adjustable Gap Cell' and 'Clamping Cell') but operating on the same principle. In order to investigate this problem, the zeta potential was determined for the three polymeric materials: poly(ethylene terephthalate) foil, thin-film polyamide composite membranes for nanofiltration and reverse osmosis. The results obtained with 'Clamping Cell' versus 'Adjustable Gap Cell' showed differences in zeta potential, where the 'Adjustable Gap Cell' gave more reproducible results. One reason for this behaviour could be the different geometries of the streaming channels. A more likely reason is the design of the 'Clamping Cell', that requires a sample size larger than necessary for zeta potential determination.
Keywords:electrical double layer, zeta potential, electrokinetic analyser, streaming current potential, polymeric materials
Year of publishing:2010
Number of pages:str. 700-706
Numbering:št. 3, Letn. 57
ISSN:1318-0207
UDC:541
ISSN on article:1318-0207
COBISS_ID:14417686 New window
NUK URN:URN:SI:UM:DK:E5XMRVTY
Views:1170
Downloads:93
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Categories:Misc.
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Record is a part of a journal

Title:Acta Chimica Slovenica
Shortened title:Acta Chim. Slov.
Publisher:Slovensko kemijsko društvo
ISSN:1318-0207
COBISS.SI-ID:14086149 New window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:31.05.2012

Secondary language

Language:Slovenian
Abstract:S pomočjo elektrokinetičnih meritev lahko določimo t. i. potencial zeta, ki določa stanje površinskega naboja na mejni površini trdnega telesa in tekočine. Podatki o površinskem naboju nam dajejo informacijo o stanju, kvaliteti in lastnostih površine makroskopskega telesa v polarnem mediju. V naši raziskavi smo potencial zeta določali z elektrokinetičnim analizatorjem »SurPASS«, ki temelji na merjenju pretočnega toka in pretočnega potenciala. Namen raziskave je bil primerjati rezultate, dobljene z različno oblikovanima merilnima celicama (»Adjustable Gap Cell« in »Clamping Cell«), ki delujeta na istem principu. V ta namen smo potencial zeta določili trem polimernim materialom: poli(etilen-tereftalatna) folija, tankoslojna poliamidna kompozitna membrana za nanofiltracijo in reverzno osmozo. Rezultati, pridobljeni s »Clamping Cell« v primerjavi z »Adjustable Gap Cell«, kažejo na razlike v potencialu zeta, kjer merilna celica »Adjustable Gap Cell« daje ponovljivejše rezultate. Eden izmed možnih razlogov za takšno obnašanje bi lahko bil v različnih geometrijah pretočnih kanalov. Veliko verjetnejši razlog leži v geometriji merilne celice »Clamping Cell«, ki zahteva večjo površino vzorca kot je potrebna za določitev potenciala zeta.
Keywords:električni dvojni sloj, potencial zeta, elektrokinetični analizator, pretočni potencial, polimerni materiali


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