Preparation of cellulose composites with in situ generated copper nanoparticles using leaf extract and their properties.
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.
Department of Chemistry, Osmania University, Hyderabad 500007, India.
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Sadanand
Department of Mechanical Engineering, Kalasalingam University, Anand Nagar, Krishnan Kovil 626126, India.
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Rajini
Centre for Composite Materials, International Research Centre, Kalasalingam University, Anand Nagar, Krishnan Kvoil 626126, India. Electronic address: avaradarajulu@gmail.com.
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Varada Rajulu
Department of Chemistry, Osmania University, Hyderabad 500007, India.
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Satyanarayana
D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology*; D002482:Cellulose / Q000737:chemistry* / Q000494:pharmacology*; D003300:Copper / Q000737:chemistry*; D004926:Escherichia coli / Q000187:drug effects; D053768:Metal Nanoparticles / Q000737:chemistry*; D000070004:Ocimum sanctum / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry*; D013718:Tensile Strength
D000900:Anti-Bacterial Agents; D003300:Copper; D002482:Cellulose
Antibacterial activity; Biodegradable nanocomposites; Copper nanoparticles; In situ generation; Tensile properties; Thermal stability