In situ generation of silver and silver oxide nanoparticles on cotton fabrics using Tinospora cordifolia as bio reductant

摘要

A simple, low cost and environmentally bioreduction method was adopted to in situ generate silver nanoparticles (AgNPs) on the surface of cellulose cotton fabrics utilizing Tinospora cordifolia leaf extract as reducing agent. The bio generation of AgNPs in nanocomposite cellulose cotton fabrics (NCCFs) was confirmed by Fourier Transform Infrared spectroscopy, Scanning Electron Microscopy along with Energy Dispersive X-ray (EDX) spectroscopy, X-ray Diffraction (XRD), primary and derivative thermogravimetric (TG and DTG) analysis and Differential Scanning Calorimetry (DSC). The generated AgNPs in NCCFs were found to be spherical in shape with an average size of 90 nm. The presence of silver element was revealed by EDX spectra with an energy absorption peak at 3 keV. The bio synthesized AgNPs were found to be crystalline in nature from XRD. The bio generated AgNPs in NCCFs were found to be stable up to 399 ℃ as confirmed by DTG and DSC analysis. These NCCFs also exhibited good mechanical properties. Further, these also exhibited good antibacterial activity against pathogenic disease producing Gram positive ( G~(+ve)) and Gram negative ( G~(−ve)) bacteria. Basing on these properties, the prepared NCCFs can be considered for medical applications such as hospital bed materials, aprons etc. and also for packing applications.