PREPARATION AND CHARACTERIZATION OF CHITOSAN-SILVER NANO COMPOSITE FILMS AND THEIR ANTIBACTERIAL ACTIVITY

Abstract

The ecological method of plant-mediated synthesis of Ag nanoparticles is an important step in the field of nanotechnology. Chitosan is a biopolymer that is biocompatible and antibacterial. In this work, we synthesized a chitosan-based hydrogel and combined herbal synthesized Ag into nanoscale nanoparticles to form CS-Ag nano hydrogel. These are green-synthesized Ag nanoparticles, which were made from the leaves of the Salix viminalis plant and characterized using a UV-visible spectrophotometer and DLS. This work focuses on the synthesis of CS-Ag nano hydrogel. These hydrogels were characterized by FTIR, XRD, and contact angles. The size distribution of nanoparticles was determined in the range from 1 to 100 nm using DLS, and the optimal wavelength was recorded in the range from 400 to 450 nm using UV-visible spectroscopic examinations. This synthesized CS-Ag nano hydrogel showed good antibacterial properties against E. coli (Gram-ve) and S. aureus (Gram+ ve) with a maximum inhibition zone of 7 mm.