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Conductive Bioplastic Based 2-HEC-NH4SCN:
Investigation on Conductivity, Thermal and Mechanical Properties
Nurul Faiqah binti Azmi
Main Supervisor: Dr. Khadijah Hilmun Binti Kamarudin
Co-Supervisor: Assoc. Prof Dr. Mohd Ikmar Nizam BinHj.Mohamad Isa
Bachelor of Applied Science (Electronics and Instrumentation Physics)
School of Ocean Engineering
Conductive bioplastic based cellulose derivatives can be an alternative to the current
conventional plastic (synthetic polymer) due to their superior properties such as low
cost, biodegradable, ease of preparation and favorable conductivity. In this research,
2-Hydroxyethyl cellulose (2-HEC) was used as biopolymer host and doped with
ammonium thiocyanate (NH4SCN) in the preparation of solid bio-polymer electrolytes
(SBEs). The conductivity, thermal and mechanical properties of SBE films were
investigated using electrochemical impedance spectroscopy, thermogravimetric
analysis-differential scanning calorimetry and texture analyzer. The 2-HEC-NH4SCN
inherits highest ionic conductivity of 1.57 x 10 -6 Scm -1 at 12 wt.% NH4SCN. Thermal
analysis reveals that Tg increase with addition of NH4SCN concentration. DSC curves
show two melting temperatures indicate decomposition of 2-HEC and NH4SCN salt.
Mechanical analysis demonstrates increment of tensile strength with increasing
NH4SCN concentration. This conductive bioplastic has a potential application to be
utilized as an electrolyte in the fabrication of batteries and supercapacitor.
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