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Study of the complex permittivity of a polyurethane matrix modified by nanoparticles

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F21%3A43961932" target="_blank" >RIV/49777513:23220/21:43961932 - isvavai.cz</a>

  • Result on the web

    <a href="https://ieeexplore.ieee.org/document/9388643" target="_blank" >https://ieeexplore.ieee.org/document/9388643</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1109/ACCESS.2021.3069144" target="_blank" >10.1109/ACCESS.2021.3069144</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Study of the complex permittivity of a polyurethane matrix modified by nanoparticles

  • Original language description

    This study presents the influence of various types of nanoparticle (NP) fillers incorporated into a polyurethane (PU) (VUKOL 022) matrix and its subsequent changes in complex permittivity. Two types of surface modification of SiO2 fillers were investigated. The frequency dependence of the real and imaginary parts of complex permittivity was measured within the frequency range of 1 mHz to 1 MHz using the capacitance method. The 1 wt.% NPs in PU caused an increase (MgO, TiO2, n-SiO2, and f-SiO2) or a decrease (d-SiO2) in the real permittivity. The relaxation and intermediate dipolar effect were observed at the temperature dependence of the imaginary permittivity. The change in permittivity by various surface modifications of SiO2 and other nanofillers was discussed based on the multi-core model. Moreover, the NPs caused a shift in the local maximum of the permittivity, which was a result of the interfacial polarisation and a charge multiplication of the relaxation process.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    20201 - Electrical and electronic engineering

Result continuities

  • Project

  • Continuities

    S - Specificky vyzkum na vysokych skolach

Others

  • Publication year

    2021

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    IEEE Access

  • ISSN

    2169-3536

  • e-ISSN

  • Volume of the periodical

    9

  • Issue of the periodical within the volume

    March 2021

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    10

  • Pages from-to

    49547 - 49556

  • UT code for WoS article

    000637524100001

  • EID of the result in the Scopus database

    2-s2.0-85107181064