Vol 23, No 3 (2019) > MJT Intl Meeting on Collaborative Technologies >

Influence of NH4F in Dextran Based Biopolymer Electrolytes: Conductivity and Electrical Analysis

Muhamad Hafiz Hamsan 1 , Mohd Fakhrul Zamani Kadir 2 , Shujahadeen Bakar Aziz 3 , Muhammad Amirul Solihin Azha 1 , Saifful Kamaluddin Muzakir 4


  1. Institute for Advanced Studies, University of Malaya, Kuala Lumpur 50603, Malaysia
  2. Centre for Foundation Studies in Science, University of Malaya, Kuala Lumpur 50603, Malaysia
  3. Advanced Polymeric Materials Research Lab, Department of Physics, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani, Kurdistan Regional Government 46001, Iraq
  4. Material Technology Programme, Faculty of Industrial Sciences & Technology,University Malaysia Pahang, Pekan 26600, Pahang, Malaysia


Abstract: Dextran polymer host was doped with different concentrations of ammonium fluoride (NH4F) via casting technique. In this present work, dextran-NH4F film has been employed to investigate the ionic conductivity using electrochemical impedance spectroscopy from 50 to 5 MHz. The highest room temperature conductivity is achieved at (2.33 ± 0.76) × 10-3 S cm-1 with 40 wt.% NH4F. The electrolyte is found to obey Arrhenius rule at high temperature with activation energy of 0.21 eV. Dielectric analysis has been performed to obtain better understanding on the conductivity pattern. The dielectric parameters e.g. ɛ real, ɛ imag, Mreal, and Mimag have been tested as a function of frequency at various temperature. The potential stability obtained for the highest electrolyte in this study is 1.58 V. 
Keywords: dextran, ammonium fluoride, dielectric, Arrhenius, ionic conductivity
Published at: Vol 23, No 3 (2019) pages: 131-136

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