✦ LIBER ✦

Characterizations of chitosan-ammonium triflate (NH4CF3SO3) complexes by FTIR and impedance spectroscopy

✍ Scribed by Ahmad Khiar, A. S. ;Puteh, R. ;Arof, A. K.

Book ID: 105363308
Publisher: John Wiley and Sons
Year: 2006
Tongue: English
Weight: 456 KB
Volume: 203
Category: Article
ISSN: 0031-8965
DOI: 10.1002/pssa.200521016

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✦ Synopsis

Abstract

Polymer electrolytes using chitosan and ammonium triflate (NH~4~CF~3~SO~3~) were prepared using the solution cast technique. FTIR confirms the complexation of chitosan and NH~4~CF~3~SO~3~ with shifting of the amine peak at 1591 cm^–1^ to 1573 cm^–1^. The highest conducting sample contains 50 wt% of NH~4~CF~3~SO~3~ and at room temperature has a conductivity of 8.91 × 10^–7^ S cm^–1^. The model of Rice and Roth has been used to calculate the number density of mobile ions (n), mobility (μ) and diffusion constant (D). Conductivity was found to be dependent on the number of mobile ions. Analysis of electrical modulus and dissipation factor (tan δ) shows that charge transport occurs through a hopping mechanism. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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