Journal
CARBOHYDRATE POLYMERS
Volume 150, Issue -, Pages 32-39Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.04.121
Keywords
Biodegradable nanocomposites; Copper nanoparticles; In situ generation; Antibacterial activity; Thermal stability; Tensile properties
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Funding
- University Grants Commission of India
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In the present work, copper nanoparticles (CuNPs) were in situ generated in cellulose matrix using Ocimum sanctum leaf extract as a reducing agent and aq. CuSO4 solution by diffusion process. Some CuNPs were also formed outside the film in the solution which were separated and viewed by Transmission electron microscope and Scanning electron microscope (SEM). The composite films showed good antibacterial activity against Escherichia coli bacteria when the CuNPs were generated using higher concentrated aq. CuSO4 solutions. The cellulose, matrix and the composite films were characterized by Fourier transform infrared spectroscopic, X-ray diffraction, thermogravimetric analysis and SEM techniques. The tensile strength of the composite films was lower than that of the matrix but still higher than the conventional polymers like polyethylene and polypropylene used for packaging applications. These biodegradable composite films can be considered for packaging and medical applications. (C) 2016 Elsevier Ltd. All rights reserved.
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