Effect of ionic strength and type of ions on the structure of water swollen polyelectrolyte multilayers

dc.contributor.authorDodoo, S.
dc.contributor.authorSteitz, R.
dc.contributor.authorLaschewsky, A.
dc.contributor.authorKlitzing, Regine von
dc.date.accessioned2016-07-01T06:27:32Z
dc.date.available2016-07-01T06:27:32Z
dc.date.issued2011
dc.descriptionDieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.de
dc.descriptionThis publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.en
dc.description.abstractThis study addresses the effect of ionic strength and type of ions on the structure and water content of polyelectrolyte multilayers. Polyelectrolyte multilayers of poly(sodium-4-styrene sulfonate) (PSS) and poly(diallyl dimethyl ammonium chloride) (PDADMAC) prepared at different NaF, NaCl and NaBr concentrations have been investigated by neutron reflectometry against vacuum, H2O and D2O. Both thickness and water content of the multilayers increase with increasing ionic strength and increasing ion size. Two types of water were identified, “void water” which fills the voids of the multilayers and does not contribute to swelling but to a change in scattering length density and “swelling water” which directly contributes to swelling of the multilayers. The amount of void water decreases with increasing salt concentration and anion radius while the amount of swelling water increases with salt concentration and anion radius. This is interpreted as a denser structure in the dry state and larger ability to swell in water (sponge) for multilayers prepared from high ionic strengths and/or salt solution of large anions. No exchange of hydration water or replacement of H by D was detected even after eight hours incubation time in water of opposing isotopic composition.en
dc.description.sponsorshipDFG, SPP 1369, Polymer-Festkörper-Kontakte: Grenzflächen und Interphasenen
dc.description.sponsorshipDFG, EXC 314, Unifying Concepts in Catalysisen
dc.identifier.eissn1463-9084
dc.identifier.issn1463-9076
dc.identifier.pmid21523268
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/5750
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-5370
dc.language.isoen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.ddc540 Chemie und zugeordnete Wissenschaftende
dc.titleEffect of ionic strength and type of ions on the structure of water swollen polyelectrolyte multilayersen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1039/c0cp01357a
dcterms.bibliographicCitation.issue21
dcterms.bibliographicCitation.journaltitlePhysical chemistry, chemical physicsen
dcterms.bibliographicCitation.originalpublishernameRoyal Society of Chemistryde
dcterms.bibliographicCitation.originalpublisherplaceCambridgede
dcterms.bibliographicCitation.pageend10325
dcterms.bibliographicCitation.pagestart10318
dcterms.bibliographicCitation.volume13
tub.accessrights.dnbdomain
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Inst. Chemiede
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.instituteInst. Chemiede
tub.publisher.universityorinstitutionTechnische Universität Berlin

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