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Int. J. Electroactive Mater. 8 (2020) 10-18

The Effect of Glycerol on Na+ Ion Conductivity and Dielectric Properties of Potato Starch-Chitosan Blend Biopolymer Electrolyte

SITI ZAFIRAH ZAINAL ABIDIN*, SHANTI NAVARATNAM, NIK ABDUL AZIZ RAHMAN, NUR AFIFAH IDRIS

FACULTY OF APPLIED SCIENCES, UNIVERSITI TEKNOLOGI MARA, SHAH ALAM, SELANGOR, Malaysia
*Email Address : szafirah@uitm.edu.my

Abstract : Petrochemical based polymer electrolytes are non-biodegradable and cause problems with waste disposal. With the growing awareness of environmental issues has led us to focus our research on using ecofriendly biodegradable materials. Starch and chitosan are natural polysaccharides obtained from plants and crustacean shells respectively. Gel polymer electrolytes comprising blends of potato starch and chitosan as host polymers, sodium chloride as dopant salt and glycerol were prepared by solution cast technique. The incorporation of glycerol enhanced the ionic conductivity of the potato starch/chitosan blend –sodium chloride gel polymer electrolyte. A maximum ionic conductivity of 2.79 × 10–4 S cm–1 is obtained at 30 wt.% glycerol. The dielectric behaviours of the prepared films were analyzed using complex impedance Z* and complex permittivity ɛ* –based frequency. Fourier transform infrared spectra (FTIR) and morphology analyses confirm the interactions among the components which are present in the prepared gel polymer electrolyte.

Keywords : Biopolymer electrolyte,Sodium ion,Conductivity,Dielectric properties,Glycerol,