Ionic conductivity studies of LiCF3SO3 doped hexanoyl-chitosan polymer films

Tan Winie (Physics Department, University of Malaya, 50603 Kuala Lumpur, Malaysia)
A.K. Arof (Physics Department, University of Malaya, 50603 Kuala Lumpur, Malaysia)

Indonesian Journal of Physics (IJP)
Vol 15 No 4 (2004): Vol. 15 No. 4, October 2004

Hexanoyl-chitosan that exhibited solubility in THF was prepared by acyl modification of chitosan. Films of hexanoyl-chitosan containing LiCF3SO3 were prepared by the solution cast technique. Complexation of the prepared electrolytes was studied by FTIR analysis. For the system containing 30 wt.% LiCF3SO3 salt, the room temperature conductivity achieved was 6.03 x 10-7 S cm-1 and with the addition of 30 wt.% EC to this system, the conductivity was enhanced to 2.75 x 10-5 S cm-1. The variations in conductivity at room temperature are explained by the Rice and Roth model from which the density of mobile ions, mobility of ions and diffusion coefficient were obtained.