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The effect of polyaniline layer deposited on silica particles on electrorheological and dielectric properties of their silicone-oil suspensions

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F05%3A63503777" target="_blank" >RIV/70883521:28110/05:63503777 - isvavai.cz</a>

  • Alternative codes found

    RIV/61389013:_____/05:00021799

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    The effect of polyaniline layer deposited on silica particles on electrorheological and dielectric properties of their silicone-oil suspensions

  • Original language description

    Investigation of the electrorheological (ER) effect of silicone-oil suspensions of silica particles coated with polyaniline (PANI) base in a DC electric field revealed that breaking stress, as a criterion the intensity of the ER phenomenon, steeply increased at first with coating thickness. At relatively low PANI content (volume fraction ? 0.05), it reached a value several times higher than that with suspension of uncoated silica. Then it became virtually constant or slightly increased. The frequency spectra of dielectric characteristics of these systems reflect high relaxation times. The results suggest that the interfacial polarization of particles is predominantly controlled by polarizability of their surface layer, and the influence of the layer thickness is of secondary importance.

  • Czech name

    Vliv vrstvy polyanilínu deponované na částicích siliky na elektrorheologické a dielektrické vlastnosti suspenzí v silikonovém oleji

  • Czech description

    Studium elektroreologického (ER) efektu u suspenzí siliky upravené polyanilínovou (PANI) bází ukázaly, že v DC elektrickém poli kritické prahové napětí nejprve strmě vzrůstá s tloušťkou potahové vrstvy. Při relativně nízkém obsahu PANI (objemový zlomek ?0,05) dosahuje hodnoty několikanásobné proti neupravené silice. Dále se pak napětí příliš nemění. Frekvenční spektra dielektrických vlastností těchto systémů ukazují vysoké relaxační časy. Mezifázová polarizace částic je řízena polarizovatelností povrchové vrstvy částic a tloušťka této vrstvy má až druhořadý význam.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CD - Macromolecular chemistry

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2005

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Physica A

  • ISSN

    0378-4371

  • e-ISSN

  • Volume of the periodical

  • Issue of the periodical within the volume

    353

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    8

  • Pages from-to

    21-28

  • UT code for WoS article

  • EID of the result in the Scopus database