Dielectric Relaxation Study of Essential oils using Time Domain Reflectometry

A.A. Sonkamble¹ , S.M. Dongarge² , M. Malathi³ , U.V. Biradar⁴

Section:Research Paper, Product Type: Journal-Paper
Vol.8 , Issue.4 , pp.13-17, Aug-2020

Online published on Aug 31, 2020

Copyright © A.A. Sonkamble, S.M. Dongarge, M. Malathi, U.V. Biradar . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
In this work, the dielectric behavior of essential oils were studied through time domain reflectometry in the microwave frequency range 10 MHz to 1 GHz at 300.15 K. The frequency dependence of dielectric permittivity and dielectric loss were determined for eucalyptus and clove oil. The complex permittivity spectra for these oils were explained using the Debye model and described by Havriliak-Negami expression. The dielectric parameters like static dielectric constant, dielectric constant at high frequency, dielectric strength, and relaxation time were measured and examined by non-linear square fit method. Further thermodynamic parameter like free energy of activation and other molecular interaction parameter like Kirkwood correlation factor and dipole moment were also determined. Here, the biophysical interaction mechanisms between essential oils and microwaves frequencies from MHz to GHz were discussed. Dielectric relaxation study of essential oils provides some dynamical and structural information of the molecules present in it

Key-Words / Index Term :
Essential oils, Time Domain Reflectometry (TDR), Dielectric parameters, Free energy of activation, Dipole moment, Kirkwood correlation factor

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