Electrical and Electrodynamic Properties of Polymer Composites with Nanocarbon Filler
| Authors | I.V. Ovsiienko1 , L.L. Vovchenko1 , L.Yu. Matzui1 , T.A. Len1 , M.I. Shut2, T.G. Sichkar2, M.M. Shut2 |
| Affiliations |
1Taras Shevchenko National University of Kyiv, Department of Physics, 01601 Kyiv, Ukraine 2Ukrainian State Dragomanov University, Department of Mathematics, Informatics and Physics, 01601, Kyiv, Ukraine |
| Е-mail | talen148@gmail.com |
| Issue | Volume 16, Year 2024, Number 6 |
| Dates | Received 05 September 2024; revised manuscript received 14 December 2024; published online 23 December 2024 |
| Citation | I.V. Ovsiienko, L.L. Vovchenko, L.Yu. Matzui, et al., J. Nano- Electron. Phys. 16 No 6, 06023 (2024) |
| DOI | https://doi.org/10.21272/jnep.16(6).06023 |
| PACS Number(s) | 61.48.De, 88.30.rh |
| Keywords | Polychlorotrifluoroethylene, Thermoexfoliated graphite, Multiwall carbon nanotubes, Conductivity (43) , Dielectric permittivity. |
| Annotation |
The paper presents the results of investigation of electrical and electrodynamic properties of polymer composites based on polychlorotrifluoroethylene with different nanocarbon fillers under heat load. As nanocarbon fillers thermoexfoliated graphite, thermoexfoliated graphite modified by silicon oxide and multiwalled carbon nanotubes have been used. Modification of TEG with silica was carried out from a colloidal 20 % solution of hydrosol (silicic acid). For investigations the bulk polymer composites based on polychlorotrifluoroethylene with different content of nanocarbon filler have been obtained by thermal pressing. The dielectric permittivity have been studied at room temperature using an ultra-high-frequency interferometer at a frequence υ = 10 GHz. Temperature dependence of electrical conductivity (Т) have been measured by two- and four-probe methods on direct and alternating current in temperature interval (293-425) K. Temperature dependence of the electrodynamic parameters has been studied with use panoramic meters of standing wave ratio and electromagnetic radiation attenuation in the temperature interval (293-373) K.It is shown that use of thermoexfoliated graphite, thermoexfoliated graphite modified with SiO2 Carbon nanotubes as fillers allows to obtain electrically conductive polymer composites with low percolation threshold ~ 0.955 % mass. At filler concentrations lower than the percolation threshold, the main contribution to the electrical conductivity of the polymer composite is made by the relaxation component of the conductivity, which is determined by the processes of interphase polarization at the polymer-filler interface. At filler concentration in the polymer composite is slightly higher than the percolation limit, the increase of the contribution of direct electrical conductivity due to direct contacts and contacts through thin polymer layers between fillers particles occurs. It is revealed that heat of polymer composites up to 373 K leads to slight improvement in shielding characteristics mainly due to an increase in the electromagnetic radiation absorption coefficient. Changes in the effective dielectric permittivity of polymer composites in the temperature range of (293-373) K do not dramatically affect the shielding characteristics of investigated polymer composites. |
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