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Electrorheological properties of suspensions of hollow globular titanium oxide/polypyrrole particles

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dc.title Electrorheological properties of suspensions of hollow globular titanium oxide/polypyrrole particles en
dc.contributor.author Sedlačík, Michal
dc.contributor.author Mrlík, Miroslav
dc.contributor.author Pavlínek, Vladimír
dc.contributor.author Sáha, Petr
dc.contributor.author Quadrat, Otakar
dc.relation.ispartof Colloid and Polymer Science
dc.identifier.issn 0303-402X OCLC, Ulrich, Sherpa/RoMEO, JCR
dc.date.issued 2012
utb.relation.volume 290
utb.relation.issue 1
dc.citation.spage 41
dc.citation.epage 48
dc.type article
dc.language.iso en
dc.publisher Springer en
dc.identifier.doi 10.1007/s00396-011-2521-x
dc.relation.uri http://www.springerlink.com/content/9810667320180344/
dc.subject Electrorheology en
dc.subject Titanium oxide en
dc.subject Hollow globular clusters en
dc.subject Polypyrrole coating en
dc.subject Core-shell particles en
dc.subject Dielectric properties en
dc.description.abstract Hollow globular clusters of titanium oxide (TiO(2)) nanoparticles were synthesized by a simple hydrothermal method. The prepared particles were consequently coated by in situ polymerization of conductive polymer polypyrrole (PPy) to obtain novel core-shell structured particles as a dispersed phase in electrorheological (ER) suspensions. The X-ray diffraction analysis and scanning electron microscopy provided information on particle composition and morphology. It appeared that PPy coating improved the compatibility of dispersed particles with silicone oil which results in higher sedimentation stability compared to that of mere TiO(2) particles-based ER suspension. The ER properties were investigated under both steady and oscillatory shears. It was found that TiO(2)/PPy particles-based suspension showed higher ER activity than that of mere TiO(2) hollow globular clusters. These observations were elucidated well in view of their dielectric spectra analysis; a larger dielectric loss enhancement and faster interfacial polarization were responsible for a higher ER activity of core-shell structured TiO(2)/PPy-based suspensions. Investigation of changes in ER properties of prepared suspensions as a function of particles concentration, viscosity of silicone oil used as a suspension medium, and electric field strength applied was also performed. en
utb.faculty Faculty of Technology
utb.faculty University Institute
dc.identifier.uri http://hdl.handle.net/10563/1002701
utb.identifier.rivid RIV/70883521:28110/12:43866383!RIV13-MSM-28110___
utb.identifier.rivid RIV/70883521:28610/12:43866383!RIV13-MSM-28610___
utb.identifier.obdid 43866471
utb.identifier.scopus 2-s2.0-84857625184
utb.identifier.wok 000298647100005
utb.identifier.coden CPMSB
utb.source j-wok
dc.date.accessioned 2012-02-13T11:08:51Z
dc.date.available 2012-02-13T11:08:51Z
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Sedlačík, Michal
utb.contributor.internalauthor Mrlík, Miroslav
utb.contributor.internalauthor Pavlínek, Vladimír
utb.contributor.internalauthor Sáha, Petr
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