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The electrorheological efficiency of polyaniline particles with various conductivities suspended in silicone oil
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SYSNO ASEP 0323110 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The electrorheological efficiency of polyaniline particles with various conductivities suspended in silicone oil Title Elektrorheolologická účinnost částic polyanilinu o různé elektrické vodivosti v suspenzi silikonového oleje Author(s) Stěnička, M. (CZ)
Pavlínek, V. (CZ)
Sáha, P. (CZ)
Blinova, Natalia V. (UMCH-V)
Stejskal, Jaroslav (UMCH-V) RID, ORCID, SAI
Quadrat, Otakar (UMCH-V)Number of authors 6 Source Title Colloid and Polymer Science - ISSN 0303-402X
Roč. 287, č. 4 (2009), s. 403-412Number of pages 10 s. Language eng - English Country CZ - Czech Republic Keywords electrorheology ; suspension ; yield stress Subject RIV BK - Fluid Dynamics R&D Projects GA202/06/0419 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000264261800004 DOI 10.1007/s00396-008-1977-9 Annotation Electrorheological (ER) behavior of silicone oil suspensions of particles of polyaniline protonated to various doping levels with ortho-phosphoric and tetrafluoroboric acids has been studied. The dynamic yield stress obtained by extrapolation of shear stress to zero shear rate using Herschel–Bulkley equation was used as a criterion of the ER efficiency. At a same molar concentration of doping acids, various protonation effects appeared and the dependences of the yield stress on the acid concentration differed. The comparison of the yield stresses with dielectric characteristics calculated from the Havriliak–Negami equation revealed that the particle conductivity, in contrast to particle permittivity, dominates the polarization process especially at higher protonation degrees. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2010
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