Carrageenan-based antimicrobial bionanocomposite films incorporated with ZnO nanoparticles stabilized by melanin

By Swarup Roy, J. Rhim. Food Hydrocolloids, 2019

198 citations recorded by the source corpus.

Abstract Zinc oxide nanoparticles (ZnONP) were prepared by reacting zinc acetate with KOH using melanin as a capping agent, and used for the preparation of antimicrobial carrageenan-based nanocomposite films. The ZnONP capped with melanin (mZnONP) was stable and flake-like, while the control ZnONP without capping was rod-like. ZnONPs, whether capped or not capped with melanin, were evenly dispersed in the carrageenan matrix to form smooth and flexible nanocomposite films. The mZnONP incorporated composite film (Carr/mZnONP) exhibited a higher UV-blocking property at the expense of less transparency than the control ZnONP incorporated nanocomposite film (Carr/ZnONP). The Carr/mZnONP composite film also exhibited higher thermal stability with increased mechanical and water vapor barrier properties than the Carr/ZnONP composite film. Both nanocomposite films exhibited strong antibacterial activity against Gram-negative foodborne pathogenic bacteria, E. coli, but slight antibacterial activity against Gram-positive bacteria, L. monocytogenes.

Subfields: Biomaterials, Rehabilitation

View Paper: https://www.semanticscholar.org/paper/6ce1e11253895882b5028cc9f84d9fcd4c6e980a