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Understanding colloidal charge renormilization from surface chemistry : experiment and theory

Understanding colloidal charge renormilization from surface chemistry : experiment and theory


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GISLER, Thomas, S. F. SCHULZ, Michal BORKOVEC, Hans STICHER, Peter SCHURTENBERGER, Bruno D'AGUANNO, Rudolf KLEIN, 1994. Understanding colloidal charge renormilization from surface chemistry : experiment and theory. In: Journal of Chemical Physics. 101(11), pp. 9924-9936. ISSN 0021-9606. eISSN 1089-7690

@article{Gisler1994Under-9206, title={Understanding colloidal charge renormilization from surface chemistry : experiment and theory}, year={1994}, doi={10.1063/1.467894}, number={11}, volume={101}, issn={0021-9606}, journal={Journal of Chemical Physics}, pages={9924--9936}, author={Gisler, Thomas and Schulz, S. F. and Borkovec, Michal and Sticher, Hans and Schurtenberger, Peter and D'Aguanno, Bruno and Klein, Rudolf} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/9206"> <dcterms:issued>1994</dcterms:issued> <dc:contributor>Sticher, Hans</dc:contributor> <dc:creator>Schurtenberger, Peter</dc:creator> <dc:contributor>Gisler, Thomas</dc:contributor> <dc:contributor>D'Aguanno, Bruno</dc:contributor> <dc:language>eng</dc:language> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/9206"/> <dcterms:abstract xml:lang="deu">In this paper we report on the charging behavior of latex particles in aqueous suspensions. We use static light scattering and acid-base titrations as complementary techniques to observe both effective and bare particle charges. Acid-base titrations at various ionic strengths provide the pH dependent charging curves. The surface chemical parameters (dissociation constant of the acidic carboxylic groups, total density of ionizable sites and Stem capacitance) are determined from tits of a Stem layer model to the titration data. We find strong evidence that the dissociation of protons is the only specific adsorption process. Effective particle charges are determined by tits of integral equation calculations of the polydisperse static structure factor to the static light scattering data. A generalization of the Poisson-Boltzmann cell model including the dissociation of the acidic surface groups and the autodissociation of water is used to predict effective particle charges from the surface chemical parameters determined by the titration experiments. We find that the light scattering data are best described by a model where a small fraction of the ionizable surface sites are sulfate groups which are completely dissociated at moderate pH. These effective charges are comparable to the predictions by a basic cell model where charge regulation is absent.</dcterms:abstract> <dc:contributor>Klein, Rudolf</dc:contributor> <dc:contributor>Borkovec, Michal</dc:contributor> <dc:creator>Schulz, S. F.</dc:creator> <dc:creator>Sticher, Hans</dc:creator> <dc:creator>Gisler, Thomas</dc:creator> <dc:creator>Borkovec, Michal</dc:creator> <dc:rights>deposit-license</dc:rights> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:54:33Z</dc:date> <dc:creator>Klein, Rudolf</dc:creator> <dcterms:title>Understanding colloidal charge renormilization from surface chemistry : experiment and theory</dcterms:title> <dc:contributor>Schurtenberger, Peter</dc:contributor> <dcterms:bibliographicCitation>First publ. in: Journal of Chemical Physics 101 (1994), 11, pp. 9924-9936</dcterms:bibliographicCitation> <dc:creator>D'Aguanno, Bruno</dc:creator> <dc:contributor>Schulz, S. F.</dc:contributor> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:54:33Z</dcterms:available> <dc:format>application/pdf</dc:format> <dcterms:rights rdf:resource="https://creativecommons.org/licenses/by-nc-nd/2.0/legalcode"/> </rdf:Description> </rdf:RDF>

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