Abstract
The present work focuses on the fabrication of environmental friendly ZnO nanocrystals and chitosan/cellulose films hosting ZnO nanoparticles (NPs) as an attempt to produce nanocomposites with enhanced bactericidal capacity. The solution casting method was used to fabricate the chitosan/cellulose blend films. Highly monodisperse ZnO nanoparticles were synthesized using Zinc acetate and Triethylene glycol (TEG) via a modified Polyol route. ZnO crystal size was controlled by the heterogeneous nucleation approach. Optical properties of ZnO nanoparticles were studied by UV–vis spectroscopy and Photoluminescence Spectroscopy (PL) techniques. The nanoparticles’ size and morphology were determined by Transmission Electron Microscopy (TEM) and X-ray diffraction (XRD), respectively. Obtained results confirmed the effectiveness of the size-controlled synthesis employed. The chitosan/cellulose/ZnO nanocomposites were characterized by Fourier Transform–Infrared spectroscopy (FTIR) and X-ray diffraction (XRD) methods. The mechanical properties of produced bare and ZnO-bearing composites were determined from stress-strain tests. The Standard Plate Count and the Halo Zone methods were used to evaluate the bactericidal properties of the ZnO nanoparticles, chitosan/cellulose blend films and chitosan/cellulose/ZnO nanocomposites against Escherichia coli (ATCC 35218).
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Acknowledgments
This material is based upon work supported by the National Science Foundation under Grant HRD 0833112 (CREST Program) and United States Department of Agriculture under Grant 2011-3842-30835 (CETARS Program). The TEM facility at FSU is funded and supported by the Florida State University Research Foundation, National High Magnetic Field Laboratory (NSF-DMR-0654118) and the State of Florida. Special thanks to UPRM Nanomaterials Processing Laboratory staff, Boris Renteria, Yarilyn Cedeño, Leomar Perez, and David Florián.
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Pérez-Altamar, M., Perales-Pérez, O. Fabrication and Characterization of Chitosan/Cellulose-ZnO Nanocomposites for Bactericidal Applications. MRS Online Proceedings Library 1685, 42–47 (2014). https://doi.org/10.1557/opl.2014.690
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DOI: https://doi.org/10.1557/opl.2014.690