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Characterizations of chitosan‐ammonium triflate (NH 4 CF 3 SO 3 ) complexes by FTIR and impedance spectroscopy
Author(s) -
Ahmad Khiar A. S.,
Puteh R.,
Arof A. K.
Publication year - 2006
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200521016
Subject(s) - trifluoromethanesulfonate , fourier transform infrared spectroscopy , conductivity , dielectric spectroscopy , chemistry , analytical chemistry (journal) , chitosan , polyelectrolyte , ion , electrolyte , diffusion , ammonium , amine gas treating , ionic conductivity , nuclear chemistry , polymer , inorganic chemistry , electrochemistry , chemical engineering , organic chemistry , thermodynamics , physics , electrode , engineering , catalysis
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)