Green electrolytes based on dextran-chitosan blend and the effect of NH4SCN as proton provider on the electrical response studies

Kadir, Mohd Fakhrul Zamani and Hamsan, M.H. (2018) Green electrolytes based on dextran-chitosan blend and the effect of NH4SCN as proton provider on the electrical response studies. Ionics, 24 (8). pp. 2379-2398. ISSN 0947-7047

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Official URL: https://doi.org/10.1007/s11581-017-2380-7

Abstract

Dextran-chitosan blend added with ammonium thiocyanate (NH4SCN)-based solid polymer electrolytes are prepared by solution cast method. The interaction between the components of the electrolyte is verified by Fourier transform infrared (FTIR) analysis. The blend of 40 wt% dextran-60 wt% chitosan is found to be the most amorphous ratio. The room temperature conductivity of undoped 40 wt% dextran-60 wt% chitosan blend film is identified to be (3.84 ± 0.97) × 10−10 S cm−1. The inclusion of 40 wt.% NH4SCN to the polymer blend has optimized the room temperature conductivity up (1.28 ± 0.43) × 10−4 S cm−1. Result from X-ray diffraction (XRD) and differential scanning calorimetry (DSC) analysis shows that the electrolyte with the highest conductivity value has the lowest degree of crystallinity (χc) and the glass transition temperature (Tg), respectively. Temperature-dependence of conductivity follows Arrhenius theory. From transport analysis, the conductivity is noticed to be influenced by the mobility (μ) and number density (n) of ions. Conductivity trend is further verified by field emission scanning electron microscopy (FESEM) and dielectric results.

Item Type: Article
Uncontrolled Keywords: Ammonium thiocyanate; Dextran-chitosan blend; Dielectric; Ionic conductivity; Solid polymer electrolyte
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Centre for Foundation Studies in Science > Physics Division
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 31 Jul 2019 02:53
Last Modified: 31 Jul 2019 02:53
URI: http://eprints.um.edu.my/id/eprint/21720

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