Broadband Dielectric Spectroscopy of Lignin

• Published in: Russian Journal of Physical Chemistry A Vol. 93; no. 2; pp. 353 - 358
• Main Authors: Bogolitsyn, K. G., Khviyuzov, S. S., Volkov, A. S., Koposov, G. D., Gusakova, M. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-02-2019; Springer Nature B.V
• Subjects: Activation energy; Broadband; Chemistry; Chemistry and Materials Science; Colloid Chemistry and Electrochemistry; Dielectric properties; Dielectric relaxation; Frequency ranges; Lignin; Physical Chemistry; Spectrum analysis; Temperature dependence; dielectric permittivity; conductivity; frequency dispersion; relaxation; lignin; relaxation time; relaxators
• ISSN: 0036-0244; 1531-863X
• DOI: 10.1134/S0036024419020055

The electrophysical properties of slightly altered sample of lignin are studied via dielectric spectroscopy in the frequency range of 10
–2
to 10
6
Hz and temperature range from −120 to 160°C. The results are processed using the Havriliak–Negami frequency dispersion model. The presence of several dielectric constant relaxation mechanisms is confirmed. The energy of activation for temperature-dependent relaxation is determined.