Dielectric Relaxation of Chitosan Films

Article Preview

Abstract:

Dielectric spectra of pure chitosan films and chitosan films with different fillers were obtained. Two relaxation processes in 200 – 500 K temperature intervals were observed: wide β - peak in the region of 290 K and  - peak in the region of 390 K. The first peak due to the presence of the polymer-bound water and/or acetic acid and disappears when filler injected into the polymer. The second peak may be associated with the activation of the nonohmic conductivity.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

336-339

Citation:

Online since:

April 2013

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2013 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] Ni Ni, Kongshuang Zh. Dielectric analysis of chitosan gel beads suspensions: Influence of low crosslinking agent concentration on the dielectric behavior // Journal of Colloid and Interface Science. 312 (2007), P. 256–264

DOI: 10.1016/j.jcis.2007.03.073

Google Scholar

[2] Bodek K.H., Balk G.W. Ageing phenomena of chitosan and chitosan-diclofenac sodium systemdetected by low-frequency dielectric spectroscopy// European Journal of Pharmaceutics and Biopharmaceutics 48 (1999), P. 141-148

DOI: 10.1016/s0939-6411(99)00036-3

Google Scholar

[3] Nogales A., Ezquerra T.A., Rueda D.R., Martinez F., Retuert J. Influence of water on the dielectric behavior of chitosan films / Colloid Polym. Sci. 275: 419-425 (1997).

DOI: 10.1007/s003960050099

Google Scholar

[4] Schonhals A., Kremer F. Analysis of dielectric spectra. In: Schonhals A, Kremer F, editors. Broadband dielectric spectroscopy. Berlin: Springer-Verlag, 2003. P. 91 [chapter 3].

DOI: 10.1002/cphc.200400460

Google Scholar

[5] Smotrina T.V., Smirnov A.K. Influence of water on relaxation processes in biopolymer sorbents // Colloid journal. 2008. Т. 70. № 3. С. 337-340.

DOI: 10.1134/s1061933x08030113

Google Scholar

[6] Smotrina T.V., Pavlov A.A. Influence of water on the structure and relaxation processes in chitosan films. // Structure and dynamics of molecular systems. 2007. №1 С. 262 – 265

Google Scholar

[7] Lim BS, Nowick AS, Kang-Wook L, Viehbeck A (1993) J Polym Sci: Part B: Polym Phys 31: 545-555

Google Scholar

[8] Varlet J, Cavaille JY, Percz J (1990) J Polym Sci: Part B: Polym Phys 28: 2691-2705

Google Scholar