Development of antibacterial cellulosic fabric via clean impregnation of silver nanoparticles

In the present study, we investigate single bath fabrication and impregnation of silver nanoparticles (SNPs) on enzymatic pretreated cotton fabric by using starch both as reducing as well as stabilizing agent under the autoclave conditions of 103.42 kPa, 121 degrees C for 15 min. The SNPs were characterized using UV-visible (UV-vis) spectroscopy, zetasizer nano and transmission electron microscopy. The UV-vis absorption spectra showed typical absorption peaks at similar to 420 nm corresponding to the surface plasmon resonance of SNPs. The hydrodynamic diameter of SNPs was as smaller as 20 nm with their respective zeta potential of -43.20 my. Both scanning electron and atomic force microscopic analyses revealed that the surface of the treated cotton fabric was rougher than that of untreated fabric, and the SNPs were present on the surface of the treated fabric. Silver mapping and elemental analysis of the treated cotton fabric using energy dispersive X-ray spectroscopy confirmed the presence of SNPs in a homogeneous distribution. The textile properties of the fabric including wettability, whiteness, tensile strength and antibacterial activity were measured by using the standard methods. The SNPs impregnated cotton fabrics showed good durable antibacterial activity against Escherichia coil and Staphylococcus aureus strains. (C) 2015 Elsevier Ltd. All rights reserved.