Antimicrobial activity of green synthesized biodegradable alginate–silver (Alg-Ag) nanocomposite films against selected foodborne pathogens

Abstract

In the recent past, the nanobiotechnology field has grown up tremendously with more applications because the synthesis process will be more practically possible techniques. Since, plant-derived biosynthesis of silver nanoparticles is superior since its eco-friendly, cost-efficient, speedy process in nature. Alginate-based eco-friendly, biodegradable nanocomposite films were prepared with Celosia cristata leaf extracts silver nanoparticles (CC-AgNPs) and sodium alginate by simple casting techniques. The synthesized alginate–silver (Alg-Ag) nanocomposite films were characterized and confirmed by UV/Vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and atomic force microscopy (AFM). The various characterization process was further confirmed synthesized CC-AgNPs and Alg-Ag nanocomposite films. In addition, TEM and SEM monogram also showed uniformity and smooth surface of Alg-Ag nanocomposite films. The nanocomposite films displayed effective antimicrobial proficiency against selected foodborne pathogens i.e., Staphylococcus aureus, Salmonella typhimurium and Clostridium perfringens. Further, the Alg-Ag nanocomposite films resolve and eliminate the microbial intruders and enhance food stuff's quality and storage stability.