Abstract
A nanocomposite hydrogel based on the polysaccharide Gum ghatti (Gg) has been made by microwave assisted polymerization of N,N-dimethylacrylamide (DMA) in the presence of Gg. Silver nanoparticles have been incorporated into the gel by chemical reduction method. The conditions for obtaining the graft copolymer gel and its nanocomposite have been optimized. The chemical, thermal and morphological characterization of the synthesized materials have been made using FTIR, TGA, SEM, EDS, XRD and TEM techniques. Swelling studies in aqueous media indicated the influence of nanoparticles in enhancing the swelling ability of the gel by three fold. In addition, the presence Ag nanoparticles is found to impart significant antibacterial property to the gel against Gram negative and Gram positive bacteria, the effect being pronounced on the former.
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