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Structure changes of electrorheological fluids based on polyaniline particles with various hydrophilicities and time dependence of shear stress and conductivity during flow
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SYSNO ASEP 0357479 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Structure changes of electrorheological fluids based on polyaniline particles with various hydrophilicities and time dependence of shear stress and conductivity during flow 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)Source Title Colloid and Polymer Science - ISSN 0340-1960
Roč. 289, č. 4 (2011), s. 409-414Number of pages 6 s. Language eng - English Country CZ - Czech Republic Keywords hydrophilicity ; hydrophobicity ; electrorheology Subject RIV CD - Macromolecular Chemistry R&D Projects GA202/09/1626 GA ČR - Czech Science Foundation (CSF) IAA400500905 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000287506700008 DOI 10.1007/s00396-010-2357-9 Annotation Particles of polyaniline protonated with perfluorooctanesulfonic acid provided a material with hydrophobic surface. This property enabled its perfect dispersion in silicone oil due to its good compatibility with the hydrophobic medium. In contrast, in a suspension of hydrophilic polyaniline particles doped with sulfamic acid, strong interactions of particles prevailed, which led to the formation of entangled chains of aggregated particles in suspension. The difference in structural properties of suspensions exists already in the absence of electric field and significantly influences their electrorheological behavior after application of electric field. The formation of electrorheological structure has been monitored by recording time dependences of the shear stress and the electric current passing through the flowing suspensions. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2011
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