Compounds of chitosan/Ag nanoparticles: conductivity and relaxation mechanisms and their relation with their macroscopic properties

Authors

  • J. Betzabe González Campos Universidad Michoacana de San Nicolás de Hidalgo, Instituto de Investigaciones Químico Biológicas
  • E. del Río Rosa Universidad Michoacana de San Nicolás de Hidalgo, Instituto de Investigaciones Químico Biológicas
  • E. Prokhorov Cinvestav Unidad Querétaro
  • J. G. Luna Bárcenas Cinvestav Unidad Querétaro

Keywords:

Chitosan, Silver nanoparticles, Bionanocomposite, Relaxation processes, Conductivity.

Abstract

The aim of this work is to investigate the conductivity mechanisms and relaxation properties of chitosan-silver nanoparticle (AgnP´s) bionanocomposites. Wet composites show the ?-relaxation process related to the glass transition phenomena, whereas, in dry composites (moisture content < 0.2 %), the glass transition disappeared. DC conductivity has shown that the dry composites exhibit a percolation threshold at 2 wt% of AgnP’s. And a 2-D hopping conductivity is observed in the 2-70°C temperature range for dry composites with wt% of AgnP’s < 2wt%. Conductivity and relaxation time temperature dependencies disclose the ?-relaxation associated with a migration property of movable hydrogen ions. This relaxation process is observed in all nanocomposites in the 70°C-180°C temperature range.

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Published

2012-03-15

How to Cite

González Campos, J. B., del Río Rosa, E., Prokhorov, E., & Luna Bárcenas, J. G. (2012). Compounds of chitosan/Ag nanoparticles: conductivity and relaxation mechanisms and their relation with their macroscopic properties. Superficies Y Vacío, 25(1), 43–48. Retrieved from https://superficiesyvacio.smctsm.org.mx/index.php/SyV/article/view/227

Issue

Vol. 25 No. 1 (2012)

Section

Research Papers

License

©2025 by the authors; licensee SMCTSM, Mexico. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).