DC Field | Value | Language |
---|---|---|
dc.contributor.author | So, JH | ko |
dc.contributor.author | Yang, Seung-Man | ko |
dc.contributor.author | Hyun, JC | ko |
dc.date.accessioned | 2009-11-12T02:46:10Z | - |
dc.date.available | 2009-11-12T02:46:10Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2001-05 | - |
dc.identifier.citation | CHEMICAL ENGINEERING SCIENCE, v.56, no.9, pp.2967 - 2977 | - |
dc.identifier.issn | 0009-2509 | - |
dc.identifier.uri | http://hdl.handle.net/10203/12475 | - |
dc.description.abstract | In the present study, the microstructural transitions of concentrated 'hard-sphere' suspensions under a simple shear flow were investigated by measuring the shear viscosity and flow-induced dichroism. Monodisperse silica particles of two different sizes, 260 and 545 nm in diameter, were prepared by the so-called modified Stober method. The monodisperse particles were coated with 3-(trimethoxysilyl)propyl methacrylate (MPTS) to enhance the dispersion stability at high particle volume fractions (phi) up to phi = 0.55. The particles were dispersed in a refractive-index matching solvent, tetrahydrofurfuryl alcohol, in which the van der Waals dispersion forces were diminished. The smaller particle suspension exhibited a smooth shear thinning up to phi = 0.55 within our shear rate window, independently of the surface modification with the silane coupling agent MPTS. Meanwhile, for the larger silica particle suspension, the viscosity shear thinned at low shear rates and shear thickened at high shear rates when phi exceeded about 0.5. The surface modification enhanced its dispersion stability and slightly decreased the sheer viscosity. Finally, the flow-induced dichroism from light passed in the flow-gradient direction probed the order-disorder transition effectively for the larger particle suspensions, such as disappearance of hexagonally ordered layered structure and formation of particle clustering. (C) 2001 Published by Elsevier Science Ltd. | - |
dc.description.sponsorship | The authors wish to acknowledge support by KOSEF under Grant No. 1999-1-307-004-3. This work was also supported partly by the Brain Korea 21 project. | en |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.subject | CONCENTRATED COLLOIDAL DISPERSIONS | - |
dc.subject | DILATANT VISCOSITY BEHAVIOR | - |
dc.subject | SHEAR-THICKENING DILATANCY | - |
dc.subject | VOLUME FRACTION | - |
dc.subject | RHEOLOGICAL PROPERTIES | - |
dc.subject | BROWNIAN SUSPENSIONS | - |
dc.subject | SILICA SUSPENSIONS | - |
dc.subject | MODEL DISPERSIONS | - |
dc.subject | PARTICLES | - |
dc.subject | SIZE | - |
dc.title | Microstructure evolution and theological responses of hard sphere suspensions | - |
dc.type | Article | - |
dc.identifier.wosid | 000169309200008 | - |
dc.identifier.scopusid | 2-s2.0-0035967451 | - |
dc.type.rims | ART | - |
dc.citation.volume | 56 | - |
dc.citation.issue | 9 | - |
dc.citation.beginningpage | 2967 | - |
dc.citation.endingpage | 2977 | - |
dc.citation.publicationname | CHEMICAL ENGINEERING SCIENCE | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Yang, Seung-Man | - |
dc.contributor.nonIdAuthor | So, JH | - |
dc.contributor.nonIdAuthor | Hyun, JC | - |
dc.type.journalArticle | Article; Proceedings Paper | - |
dc.subject.keywordAuthor | suspension | - |
dc.subject.keywordAuthor | rheology | - |
dc.subject.keywordAuthor | microstructure | - |
dc.subject.keywordAuthor | dispersion | - |
dc.subject.keywordAuthor | hard spheres | - |
dc.subject.keywordAuthor | order-disorder transition | - |
dc.subject.keywordPlus | CONCENTRATED COLLOIDAL DISPERSIONS | - |
dc.subject.keywordPlus | DILATANT VISCOSITY BEHAVIOR | - |
dc.subject.keywordPlus | SHEAR-THICKENING DILATANCY | - |
dc.subject.keywordPlus | VOLUME FRACTION | - |
dc.subject.keywordPlus | RHEOLOGICAL PROPERTIES | - |
dc.subject.keywordPlus | BROWNIAN SUSPENSIONS | - |
dc.subject.keywordPlus | SILICA SUSPENSIONS | - |
dc.subject.keywordPlus | MODEL DISPERSIONS | - |
dc.subject.keywordPlus | PARTICLES | - |
dc.subject.keywordPlus | SIZE | - |
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