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Electrorheological characterization of dispersions in silicone oil of encapsulated liquid crystal 4-n-penthyl-4 '-cyanobiphenyl in polyvinyl alcohol and in silica

2015-03Journal article Restricted access
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dc.contributor.authorBrehm, Tiago
dc.contributor.authorPereira, Gonçalo
dc.contributor.authorLeal, Catarina R.
dc.contributor.authorGonçalves, Clara
dc.contributor.authorBorges, João P.
dc.contributor.authorCidade, Maria Teresa
dc.date.accessioned2016-04-12T15:42:53Z
dc.date.available2016-04-12T15:42:53Z
dc.date.issued2015-03
dc.description.abstractThe electrorheological (ER) effect is known as the change in the apparent viscosity upon the application of an external electric field perpendicular to the flow direction. In this work we present the electrorheological behaviour of suspensions in silicone oil of two different dispersed phases: foams of liquid crystal 4-n-penthyl-4'-cyanobiphenyl (5CB) encapsulated in polyvinyl alcohol (PVA) and nano/microspheres of 5CB encapsulated in silica. We will present the viscosity curves under the application of an electric field ranging between 0 and 3 kV mm(-1). The ER effect was observed for the suspensions of 5CB/PVA but not in the case of 5CB/silica. For the case of the suspensions of 5CB/PVA, the effect of the viscosity of the continuum phase and the concentration of the dispersed phase was analysed, showing that the enhancement of the viscosity of the suspension increases with the concentration, as expected, however the continuum phase viscosity has no significant effect, at least in the investigated viscosity range.pt_PT
dc.identifier.citationBREHM, Tiago; [et al] – Electrorheological characterization of dispersions in silicone oil of encapsulated liquid crystal 4-n-penthyl-4 '-cyanobiphenyl in polyvinyl alcohol and in silica. Physica Scripta, ISSN 0031-8949. Vol. 90, N.º 3 (2015), pp. 1-9.pt_PT
dc.identifier.doi10.1088/0031-8949/90/3/035802pt_PT
dc.identifier.eissn1402-4896
dc.identifier.issn0031-8949
dc.identifier.urihttp://hdl.handle.net/10400.21/5958
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherIOP Publishing LTDpt_PT
dc.relation.ispartofseries;035802
dc.relation.publisherversionhttp://iopscience.iop.org/article/10.1088/0031-8949/90/3/035802/metapt_PT
dc.subjectElectrorheologypt_PT
dc.subjectEncapsulated 5CBpt_PT
dc.subjectSuspensionspt_PT
dc.subjectSilicapt_PT
dc.subjectPVApt_PT
dc.titleElectrorheological characterization of dispersions in silicone oil of encapsulated liquid crystal 4-n-penthyl-4 '-cyanobiphenyl in polyvinyl alcohol and in silicapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage9
oaire.citation.issue3pt_PT
oaire.citation.startPage1
oaire.citation.titlePhysica Scriptapt_PT
oaire.citation.volume90pt_PT
person.familyNameMarques Mendes Almeida da Rosa Leal
person.givenNameCatarina
person.identifierA-2814-2009
person.identifier.ciencia-idAF15-486E-BB15
person.identifier.orcid0000-0001-5871-4936
person.identifier.scopus-author-id7005379280
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication4db8990d-5eb1-4515-ae7a-68873cf776a5
relation.isAuthorOfPublication.latestForDiscovery4db8990d-5eb1-4515-ae7a-68873cf776a5

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