Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6489112 | Food Packaging and Shelf Life | 2018 | 7 Pages |
Abstract
Chitosan-based biocomposite films have attracted considerable attention due to their versatile physicochemical properties, and higher antimicrobial and antioxidant activities. This study investigated the physiochemical properties and examined the antimicrobial and antioxidant activities of chitosan/TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical) bio-composite films. The films were prepared by incorporating different ratios of chitosan (100, 85, and 75â¯wt.%), TEMPO cellulose nanofibers (0, 15, and 25â¯wt.%) and sorbitol (25â¯wt.%). The bio-composite films were casted in an oven at 40â¯Â°C for 2-4 days. The successful incorporation of chitosan was confirmed by Fourier transform Infrared spectroscopy (FTIR) and thermal stability (TGA) measurements. The antimicrobial activity results showed a significant reduction in the growth of Salmonella enterica, E. coli O157:H7, and Listeria monocytogenes bacteria on the surface of the films with the proportional increase of chitosan. Results also showed a significant increase in the antioxidant activity of films with high chitosan concentration. The improved antimicrobial and antioxidant activities indicate that such films can be used successfully as packaging materials for several foods.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Bioengineering
Authors
Bhawna Soni, Barakat Mahmoud, Sam Chang, Emad M. El-Giar, El Barbary Hassan,