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Journal of Nanotechnology
Volume 2013, Article ID 140273, 9 pages
Research Article

Chitosan/Carboxymethylcellulose/Ionic Liquid/Ag(0) Nanoparticles Form a Membrane with Antimicrobial Activity

1Laboratory of Physical Chemistry, School of Chemistry and Food, Universidade Federal do Rio Grande (FURG), Avendia Itália Km 08, 96201-900 Rio Grande do Sul, RS, Brazil
2Institute of Science and Food Technology, Universidade Federal do Rio Grande do Sul (UFRGS), Rio Grande do Sul, RS, Brazil

Received 22 January 2013; Accepted 7 February 2013

Academic Editor: Benjaram M. Reddy

Copyright © 2013 Camila Quadros 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.


Silver metal nanoparticles were immobilized in chitosan/carboxymethylcellulose/BMI.BF4(1-n-butyl-3-methylimidazolium tetrafluoroborate ionic liquid) (CS/CMC/IL) to form polymeric membrane with 20 μm thickness. The CS/CMC/IL polymeric membrane was prepared using a simple solution blending method. Irregularly shaped Ag(0) nanoparticles with monomodal size distributions of  nm Ag(0) were immobilized in the membrane. The presence of small Ag(0) nanoparticles induced an augmentation in the CS/CMC/IL film surface areas. The CS/CMC/IL membrane containing Ag(0) showed increase antimicrobial activity the Ag(0) concentration increased up to saturation at 10 mg. CS/CMC/IL membrane that contains Ag(0) nanoparticles has enhanced durability of the membrane and exhibited stronger antimicrobial activity against Escherichia coli and Staphylococcus aureus.