Molecular interactions studies of methyl cellulose-water solutions using dielectric spectroscopy

ABSTRACT

Time Domain Reflectometry (TDR) and frequency domain techniques have been used for the dielectric measurement of methyl cellulose (MC) with water for different concentrations and frequency ranges from 20 Hz to 2 MHz and 10 MHz to 30 GHz at 25°C. The dielectric relaxation in these mixtures can be represented by the Debye relaxation behaviour. The dielectric parameters such as complex permittivity ε*(ω), complex electrical modulus M*(ω), complex electrical conductivity σ*(ω), loss tangent (tan δ), static dielectric constant (ε₀) and relaxation time (τ) have been determined. The variation of dielectric parameters of methyl cellulose (MC) in water suggested that methyl cellulose (MC) bonds with water alter its structure and electric dipole moment.

KEYWORDS:

• Complex permittivity spectra
• relaxation time
• electrode polarisation
• LCR metre
• TDR

Acknowledgments

The financial support from the department of science and technology, New Delhi, is gratefully acknowledged (project no. DST PROJECT- SB/S2/LOP-032/2013). The authors would like to express their gratitude to the Chhatrapati Shahu Maharaja Research, Training, and Human Development Institute (SARTHI) for giving them the Chief Minister Special Research Fellowship - 2021. (CMSRF - 2021).

Disclosure statement

No potential conflict of interest was reported by the authors.