Number of the records: 1
Electrorheology of suspensions of variously protonated polyaniline particles under steady and oscillatory shear
- 1.
SYSNO ASEP 0349956 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve SCOPUS Title Electrorheology of suspensions of variously protonated polyaniline particles under steady and oscillatory shear 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 Applied Rheology. - : KERSCHENSTEINER VERLAG GMBH - ISSN 1430-6395
Roč. 20, č. 5 (2010), 55371_1-55371_7Number of pages 7 s. Language eng - English Country DE - Germany Keywords polyaniline ; electrorheology ; steady shear Subject RIV BK - Fluid Dynamics R&D Projects GA202/09/1626 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40500505 - UMCH-V (2005-2011) EID SCOPUS 77957676088 DOI 10.3933/ApplRheol-20-55371 Annotation Electrorheological (ER) and dielectric properties of silicone-oil suspensions of polyaniline (PANI) particles protonated with phosphoric and tetrafluoroboric acids to various doping level have been investigated. The particle conductivity was thus varied between the order of 10-9 S/cm and 10-4 S/cm. The dynamic yield stresses obtained at controlled shear rate mode viscometry, the storage moduli from the oscillatory shear experiments and the dielectric relaxation times from frequency dependences of dielectric constant and loss factor were used as criteria of rigidity or elasticity of ER structures and particle mobility in the electric field. The conductivity of suspension particles plays a decisive role in their ER behaviour. The ER efficiency increased as conductivity of dispersed particles raised, irrespective of the type of employed acid used for the protonation of PANI. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2011
Number of the records: 1