Preparation and characterization of carboxymethyl- cellulose biopolymer electrolytes doped with dodecyltrimethyl ammonium bromide
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Date
2010
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Malaysia Terengganu
Abstract
In this research, carboxymethylcellulose (CMC)-dodecyltrimethyl ammonium
bromide (OTAB) solid polymer electrolyte system was prepared. CMC was used as
the polymer host and doped with OT AB salt. The concentration of salt was carried
between 5 to 40wt. % and has been prepared by solution casting method. The
polymer-salt complex formation and the polymer-proton interactions have been
analyzed by FT-IR spectroscopy. The peak of coo·
in CMC at 1602 cm·
shifted to
1573 cm·
1
1
1
respectively with
addition of OT AB. The conductivity and dielectric measurements were carried out for
this system at various temperatures. The complex impedance spectroscopy results
reveal that the high-frequency semicircle is due to the bulk effect of the material. The
conductivity was found to increase in the order of 10
1
and peak of C-H at 1479 cm·
shifted to 1459 cm·
-6
4
at room
temperature with the increase in salt concentration. The system was found to obey the
Arrhenius rule. Analysis of the conductivity data and the frequency exponent shows
that the small polaron hopping (SPH) model for conduction mechanism. From ionic
transport parameter study, the number density of ions, 1/, mobile ions,µ and diffusion
coefficient, D was calculated. The TNM and FTIR results proven that the CMC
OT AB is a proton conducting polymer electrolytes.
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Ahmad Salihin Samsudin, LP 1 FST 1 2010