Article,
DC conductivity and dielectric permittivity of collagen-chitosan films
MATERIALS CHEMISTRY AND PHYSICS, 99 (2-3): 284-288 (2006)
DOI: 10.1016/j.matchemphys.2005.10.027
Abstract
In this paper we studied the physicochemical and dielectric properties
of collagen-chitosan films, considering the development of new
biomaterials which have potential applications in coating of
cardiovascular prostheses, support for cellular growth and in systems
for controlled drug delivery. The dielectric permittivity epsilon(11)
were obtained for the collagen and collagen-chitosan films. Our results
also show that the presence of chitosan contributes to an increase of
the thermal stability of the collagen films, which is associated with
the increase of the denaturation temperature of the collagen-chitosan
samples compared with the collagen sample. We believe that the increase
of the organization of the microscopic structure of the sample, results
in an increase of the thermal stability. For the samples under study,
the highest conductivity was obtained for the chitosan film compared to
the pure collagen film. Around room temperature it is around 10 times
bigger than pure collagen. (c) 2005 Elsevier B.V. All rights reserved.
