Cellulose acetate/AgNPs-organoclay and/or thymol nano-biocomposite films with combined antimicrobial/antioxidant properties for active food packaging use

Please use this identifier to cite or link to this item: http://hdl.handle.net/10045/82168
Información del item - Informació de l'item - Item information
Title: Cellulose acetate/AgNPs-organoclay and/or thymol nano-biocomposite films with combined antimicrobial/antioxidant properties for active food packaging use
Authors: Dairi, Nassima | Ferfera-Harrar, Hafida | Ramos, Marina | Garrigós, María del Carmen
Research Group/s: Análisis de Polímeros y Nanomateriales
Center, Department or Service: Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología
Keywords: Active food packaging | Cellulose acetate | Silver nanoparticles | Montmorillonite | Curcuma longa extract | Thymol | Antimicrobial and antioxidant activities
Knowledge Area: Química Analítica
Issue Date: Jan-2019
Publisher: Elsevier
Citation: International Journal of Biological Macromolecules. 2019, 121: 508-523. doi:10.1016/j.ijbiomac.2018.10.042
Abstract: Nano-biocomposite films based on plasticized cellulose acetate/triethyl citrate (CA/TEC) were prepared with silver nanoparticles (AgNPs)/gelatin-modified montmorillonite nanofiller (AgM) and thymol (Th). AgNPs were biosynthesized in situ the clay using Curcuma longa (C. longa) tuber extract. Full characterization of clay and the formulated films was conducted including morphological, physical and functional properties. From the results, the AgNPs showed spherical shape, face centred cubic crystalline structure, and small average size with narrow distribution. Intercalated structure of films was achieved with some exfoliated platelets and clay aggregates. The glass transition temperature (Tg) of CA increased slightly by the added clay but decreased by Th due to its plasticizing effect. Also, the thermal stability of CA was enhanced only by the added clay. Increasing contents of both additives into films declined the optical clarity but enhanced greatly the UV barrier ability. The clay improved the tensile and oxygen barrier properties, while the Th initiated an antagonist effect. Besides, the radical 2,2‑diphenyl‑1‑picrylhydrazyl (DPPH) tests highlighted antioxidant activities of Th-included films. The films showed antimicrobial activities against bacteria and fungi, where Escherichia coli (E. coli) was the most sensitive, with an efficient growth inhibition in vapour-phase method. These materials with antimicrobial/antioxidant properties are promising active packaging.
URI: http://hdl.handle.net/10045/82168
ISSN: 0141-8130 (Print) | 1879-0003 (Online)
DOI: 10.1016/j.ijbiomac.2018.10.042
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 Elsevier B.V.
Peer Review: si
Publisher version: https://doi.org/10.1016/j.ijbiomac.2018.10.042
Appears in Collections:INV - NANOBIOPOL - Artículos de Revistas

Files in This Item:
Files in This Item:
File Description SizeFormat 
Thumbnail2019_Dairi_etal_IntJBioMacromol_final.pdfVersión final (acceso restringido)4,6 MBAdobe PDFOpen    Request a copy
Thumbnail2019_Dairi_etal_IntJBioMacromol_accepted.pdfAccepted Manuscript (acceso abierto)18,21 MBAdobe PDFOpen Preview

Items in RUA are protected by copyright, with all rights reserved, unless otherwise indicated.