Microstructure and rheological behaviour of electrosterically stabilized silica particle suspensions

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dc.contributor.authorSo, JHko
dc.contributor.authorYang, Seung-Manko
dc.contributor.authorKim, Cko
dc.contributor.authorHyun, JCko
dc.date.accessioned2009-11-17T06:18:48Z-
dc.date.available2009-11-17T06:18:48Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2001-09-
dc.identifier.citationCOLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v.190, no.1-2, pp.89 - 98-
dc.identifier.issn0927-7757-
dc.identifier.urihttp://hdl.handle.net/10203/12740-
dc.description.abstractIn the present study, microstructural transitions of silica suspensions were examined by rheological measurements under either steady simple shear or oscillatory flow. First, monodisperse silica particles were prepared by the so-called modified Stober method and were stabilized sterically in organic medium. Silane coupling agent, such as 3(trimethoxysilyl)propyl methacrylate or N-[3-(trimethoxysilyl)propyl] ethylenediamine (aminosilane coupling agent) was coated onto the particle surface to induce steric stabilization at various volume fractions (phi) up to phi = 0.45. To ensure 'hard' sphere suspension, the silica particles were dispersed in a refractive-index matching solvent, tetrahydrofurfuryl alcohol, in which the van der Waals dispersion forces diminished. Second, charge stabilized silica particles were prepared in aqueous medium. In this case, ionic strength was adjusted by KCl concentration after surface modification with amino silane coupling agent. The charge stabilized suspension showed stable shear-thinning behaviour, which was well contrasted by the hard sphere suspension. The latter exhibited negligible electrostatic repulsion and only short-range interactions. Finally, microstructural transition of aqueous silica suspensions from liquid- to solid-like structure was examined in terms of particle volume fraction and salt concentration. (C) 2001 Elsevier Science BN. All rights reserved.-
dc.description.sponsorshipThis work was supported by a grant from the Ministry of Commerce, Industry and Energy. The authors also acknowledge partial supports from the Brain Korea 21 project and from the Applied Rheology Center.en
dc.languageEnglish-
dc.language.isoen_USen
dc.publisherELSEVIER SCIENCE BV-
dc.subjectCOLLOIDAL DISPERSIONS-
dc.subjectBROWNIAN SUSPENSIONS-
dc.subjectMONODISPERSE-
dc.subjectTRANSITIONS-
dc.subjectDIFFUSION-
dc.subjectFRACTION-
dc.subjectFORCES-
dc.subjectLATEX-
dc.subjectSIZE-
dc.titleMicrostructure and rheological behaviour of electrosterically stabilized silica particle suspensions-
dc.typeArticle-
dc.identifier.wosid000170713500011-
dc.identifier.scopusid2-s2.0-0035975757-
dc.type.rimsART-
dc.citation.volume190-
dc.citation.issue1-2-
dc.citation.beginningpage89-
dc.citation.endingpage98-
dc.citation.publicationnameCOLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS-
dc.embargo.liftdate9999-12-31-
dc.embargo.terms9999-12-31-
dc.contributor.localauthorYang, Seung-Man-
dc.contributor.nonIdAuthorSo, JH-
dc.contributor.nonIdAuthorKim, C-
dc.contributor.nonIdAuthorHyun, JC-
dc.type.journalArticleArticle; Proceedings Paper-
dc.subject.keywordAuthorsilica suspension-
dc.subject.keywordAuthormicrostructural transition-
dc.subject.keywordAuthorcharge stabilization-
dc.subject.keywordAuthorsoft and hard spheres-
dc.subject.keywordAuthorrheological behaviour-
dc.subject.keywordPlusCOLLOIDAL DISPERSIONS-
dc.subject.keywordPlusBROWNIAN SUSPENSIONS-
dc.subject.keywordPlusMONODISPERSE-
dc.subject.keywordPlusTRANSITIONS-
dc.subject.keywordPlusDIFFUSION-
dc.subject.keywordPlusFRACTION-
dc.subject.keywordPlusFORCES-
dc.subject.keywordPlusLATEX-
dc.subject.keywordPlusSIZE-
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