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Journal of Nanomaterials
Volume 2011, Article ID 721631, 8 pages
Research Article

Antimicrobial Bacterial Cellulose-Silver Nanoparticles Composite Membranes

1Institute of Chemistry, São Paulo State University (UNESP), 14801-970 Araraquara, SP, Brazil
2Instituto de Ciência e Tecnologia (ICT), Universidade Federal de Alfenas (UNIFAL-MG), Campus Avançado de Poços de Caldas, Rua Gabriel Monteiro da Silva, 37130-000 Alfenas, MG, Brazil
3Uniara, 14801-320 Araraquara, SP, Brazil

Received 13 December 2010; Accepted 21 February 2011

Academic Editor: Edward Andrew Payzant

Copyright © 2011 Hernane S. Barud et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Antimicrobial bacterial cellulose-silver nanoparticles composite membranes have been obtained by “in situ” preparation of Ag nanoparticles from hydrolytic decomposition of silver nitrate solution using triethanolamine as reducing and complexing agent. The formation of silver nanoparticles was evidenced by the X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and absorption in the UV-Visible (350 nm to 600 nm). Thermal and mechanical properties together with swelling behavior for water were considered. TEA concentration was observed to be important in order to obtain only Ag particles and not a mixture of silver oxides. It was also observed to control particle size and amount of silver contents in bacterial cellulose. The composite membranes exhibited strong antimicrobial activity against Gram-negative and Gram-positive bacteria.