Browsing by Author "Nur Hidayah Binti Ahmad"

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    Proton conducting solid polymer electrolytes based carboxymethyl cellulose doped ammonium chloride: ionic conductivity and transport studies
    (International Journal of Plastics Technology, 2015-03) Nur Hidayah Binti Ahmad
    The present work focuses on the preparation of solid polymer electrolytes (SPEs) based carboxymethyl cellulose, CMC as host polymer doped with ammonium chloride, AC (0–20 wt.%) as ionic dopant via solution casting technique. The ionic conductivity and transport parameter of SPEs films were analyzed using electrical impedance spectroscopy in the frequency range of 1 Hz–50 MHz at selected temperature of 303–383 K. The highest ionic conductivity of 1.43×10−3 S/cm was obtained at 16 wt.% AC. Temperature-dependent ionic conductivity showed that the ionic conductivity obeys Arrhenius rule where R2~1 and thermally assisted. Transport studies showed that the ionic conductivity was influenced by the ionic mobility and diffusion coefficient
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    Structural, Thermal And Electrical Characterization Of Carboxymethyl Cellulose – Ammonium Chloride – Based Solid Biopolymer Electrolytes For Use In Rechargable Protonic Cell
    (Universiti Malaysia Terengganu, 2017-10) Nur Hidayah Binti Ahmad
    Two solid biopolymer electrolyte (SBE) systems of carboxymethyl cellulose doped ammonium chloride (CMC-AC) and plasticized with propylene carbonate (CMC- AC-PC) have been successfully prepared by solution casting technique. Both SBE systems were translucent, free-standing and flexible with no phase separation. In this research, two different IR methods; Gaussian 09W software as computational and Fourier Transform Infrared (FTIR) as experimental, were used to identify the complexation between polymer, salt and plasticizer. Gaussian 09W analysis reveals the complexation occurred between CMC and AC at 1412cm -1 -1 and 1585cm . No significant complexation is observed with the addition of PC, hence, PC has created new pathway and acted as lubricant in the SBEs. X-Ray Diffraction (XRD) analysis showed the amorphous pattern for both systems. With the addition of PC, XRD analysis showed that PC had increased the amorphousness of the SBEs. Thermal analysis by Differential Scanning Calorimetry (DSC) showed decrease in the value of glass transition temperature, Tg with addition of salt / plasticizer concentration