Eco-friendly nanocomposite biofilm based on sage seed gum/gelatin/TiO: Fabrication and characterization.

Int J Biol Macromol

Department of Food Science and Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran.

Published: December 2024

In the current study, the sage seed gum/gelatin-TiO (SG/Ge-TiO) nanocomposite films were prepared. Their physical, mechanical, chemical, barrier, surface, structural, and microbial characteristics are determined as a function of different ratios of sage seed gum (SG) to gelatin (1 to 2, 2 to 1 and 1 to 1) and different concentrations of TiO nanoparticles (0, 2, 4 % based on biopolymer (w/v)). The results indicated increases in the tensile strength, elongation at break, thickness, brightness (L*), whiteness index (WI), and contact angle, as gelatin content and concentration of TiO nanoparticles increase. In addition, the increases of TiO nanoparticles and the increased content of SG lead to an increase in the surface roughness of the films. As the gelatin content and the concentration of TiO nanoparticles increased, the barrier characteristics against water vapor, oxygen, and light increased, so that the water vapor, oxygen, and light permeability in the SG 1-Ge 2-4 % film decreased by 66.93 %, 80.89 %, and 47.43 %, respectively, compared to the SG 2 Ge 1-0 % film. According to the results of structural and thermal investigation, the crystallinity degree in the films increased as the gelatin content and the concentration of TiO nanoparticles increased, resulting in the enhanced thermal stability of the film. The addition of TiO nanoparticles brought about antimicrobial characteristics in the film, with no significant effect on the antioxidant activity and total phenol content (p > 0.05). The results indicated that SG-Ge-TiO bionanocomposite films (especially SG 1-Ge 2-4 %) can be considered a suitable option for active food packaging as well as medical applications (e.g. active wound adhesive) due to its favorable characteristics.

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Source
http://dx.doi.org/10.1016/j.ijbiomac.2024.137558DOI Listing

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