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
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20201 - Electrical and electronic engineering
Result continuities
Project
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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
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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