Počet záznamů: 1

Structure changes of electrorheological fluids based on polyaniline particles with various hydrophilicities and time dependence of shear stress and conductivity during flow

  1. 1.
    0357479 - UMCH-V 2011 RIV CZ eng J - Článek v odborném periodiku
    Stěnička, M. - Pavlínek, V. - Sáha, P. - Blinova, Natalia V. - Stejskal, Jaroslav - Quadrat, Otakar
    Structure changes of electrorheological fluids based on polyaniline particles with various hydrophilicities and time dependence of shear stress and conductivity during flow.
    Colloid and Polymer Science. Roč. 289, č. 4 (2011), s. 409-414 ISSN 0340-1960
    Grant CEP: GA ČR GA202/09/1626; GA AV ČR IAA400500905
    Výzkumný záměr: CEZ:AV0Z40500505
    Klíčová slova: hydrophilicity * hydrophobicity * electrorheology
    Kód oboru RIV: CD - Makromolekulární chemie

    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.
    Trvalý link: http://hdl.handle.net/11104/0195748