Abstract
Herein, nano silver decorated starch hybrid poly(ethymethacrylate) (PEMA) nanobiocomposites are prepared by in situ polymerization technique. Electron microscopic studies are done in order to determine the morphology of nanobiocomposites. Spectroscopical investigations of the synthesized PEMA-co-starch/GO/Ag nanobiocomposites are done in order to confirm the formation of nanobiocomposites. The existence of intermolecular hydrogen bonding in PEMA-co-starch is confirmed from Fourier transform infrared spectroscopy (FTIR) plot. The biodegradability, thermal stability, oxygen barrier properties, chemical resistance and antimicrobial properties of nanobiocomposites are enhanced significantly due to the proper dispersion of graphene oxide (GO) and AgNPs in PEMA-co-starch. The degradation temperature of material increases with a remaining residue of 24% after 800 ºC. The oxygen barrier property is increased by 40% in PEMA-co-starch/GO/Ag2wt% than that of copolymer. The tensile strength value has shown significant improvement from 0.5wt% to 1wt% of AgNPs loading. The biodegradability of nanobiocomposites is 4.5% after 180 days. The diameter of inhibition zone PEMA-co-starch/GO/Ag2wt% towards Pseudomonas aeruginosa, Bacillus subtilis, Staphylococcus aureus and Escherichia coli are 23mm, 18mm, 19mm and 24mm respectively. The thermally stable nanobiocomposites with high barrier properties, biodegradability and antimicrobial behavior are suitable for packaging industry.
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