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Gallic acid functionalized chitosan immobilized nanosilver for modified chitosan/Poly (vinyl alcohol) composite film.
- Source :
-
International Journal of Biological Macromolecules . Dec2022:Part B, Vol. 222, p2987-3000. 14p. - Publication Year :
- 2022
-
Abstract
- Food spoilage caused by bacterial growth is a serious threat to human health. Silver nanoparticles (AgNPs) have antibacterial activity against various pathogenic microorganisms, but their rapid release often leads to cumulative toxicity. In this paper, silver nanoparticles (AgNPs@CG) were reduced and immobilized in situ using gallic acid-functionalized chitosan (CG) as a reducing and stabilizing agent to achieve a long-lasting and stable controlled release of Ag+. The AgNPs@CG was incorporated into the CG/PVA composite film. The results showed that the release of Ag+ was only 0.686 ± 0.022 mg·L−1 after seven days, which had a long-lasting antibacterial effect on E. coli and S. aureus. In addition, CG/PVA/AgNPs-2 composite film can significantly improve the freshness preservation effect in fresh-cut apple preservation applications. In conclusion, CG/PVA/AgNPs composite film has potential applications as effective and safe packaging material to extend the shelf life of food products. • Gallic acid-functionalized chitosan to obtain with better water solubility, reducing and antioxidant capacity • AgNPs@CG is prepared by in-situ reduction using gallic acid-functionalized chitosan. • CG/PVA/AgNPs laminate films are promising packaging films. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01418130
- Volume :
- 222
- Database :
- Academic Search Index
- Journal :
- International Journal of Biological Macromolecules
- Publication Type :
- Academic Journal
- Accession number :
- 160044292
- Full Text :
- https://doi.org/10.1016/j.ijbiomac.2022.10.074