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Article

Hot-Melt-Extruded Active Films Prepared from EVOH/Trans-Cinnamaldehyde Blends Intended for Food Packaging Applications

1
Grupo de Tecnología de Envases y Embalajes, Instituto Tecnológico del Embalaje, Transporte y Logística, ITENE, Unidad Asociada al CSIC, calle de Albert Einstein 1, 46980 Valencia, Spain
2
Instituto de Agroquímica y Tecnología de Alimentos, IATA-CSIC, calle del Catedrático Agustín Escardino Benlloch 7, 46980 Valencia, Spain
3
Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, calle Juan de la Cierva 3, 28006 Madrid, Spain
*
Authors to whom correspondence should be addressed.
Academic Editors: Fulgencio Marin-Iniesta, Ginés Benito Martínez-Hernández and Amaury Taboada Rodriguez
Foods 2021, 10(7), 1591; https://doi.org/10.3390/foods10071591
Received: 29 May 2021 / Revised: 5 July 2021 / Accepted: 7 July 2021 / Published: 8 July 2021
(This article belongs to the Special Issue Plant Bioactive Compounds in Foods and Food Packages)
In this work, novel active films based on ethylene vinyl alcohol copolymer (EVOH) and cinnamaldehyde (CIN) were successfully obtained employing a hybrid technique consisting of a two-step protocol involving the preparation of a polymeric EVOH-CIN masterbatch by solvent-casting for its further utilization in the preparation of bioactive EVOH-based films by melt extrusion processing. The influence of CIN over the EVOH matrix was studied in terms of optical, morphological, thermal, and mechanical properties. Optically transparent films were obtained and the incorporation of cinnamaldehyde resulted in yellow-colored films, producing a blocking effect in the UV region. A decrease in the glass transition temperature was observed in the formulations containing cinnamaldehyde, indicating a plasticizing effect. This phenomenon was confirmed by an increase in the elongation at break values of the extruded films. Results from thermogravimetric analysis determined a slight decrease in the thermal stability of EVOH provoked by the vaporization of the bioactive compound. Bioactive properties of the films were also studied; the presence of residual cinnamaldehyde in EVOH after being subjected to an extrusion process conferred some radical scavenging activity determined by the DPPH assay whereas films were able to exert antifungal activity in vapor phase against Penicillium expansum. Therefore, the present work shows the potential of the hybrid technique employed in this study for the preparation of bioactive films by a ready industrial process technology for food packaging applications. View Full-Text
Keywords: cinnamaldehyde; ethylene vinyl alcohol copolymer; active packaging; melt-extrusion; film properties; antioxidant and antimicrobial packaging cinnamaldehyde; ethylene vinyl alcohol copolymer; active packaging; melt-extrusion; film properties; antioxidant and antimicrobial packaging
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MDPI and ACS Style

Aragón-Gutiérrez, A.; Heras-Mozos, R.; Gallur, M.; López, D.; Gavara, R.; Hernández-Muñoz, P. Hot-Melt-Extruded Active Films Prepared from EVOH/Trans-Cinnamaldehyde Blends Intended for Food Packaging Applications. Foods 2021, 10, 1591. https://doi.org/10.3390/foods10071591

AMA Style

Aragón-Gutiérrez A, Heras-Mozos R, Gallur M, López D, Gavara R, Hernández-Muñoz P. Hot-Melt-Extruded Active Films Prepared from EVOH/Trans-Cinnamaldehyde Blends Intended for Food Packaging Applications. Foods. 2021; 10(7):1591. https://doi.org/10.3390/foods10071591

Chicago/Turabian Style

Aragón-Gutiérrez, Alejandro, Raquel Heras-Mozos, Miriam Gallur, Daniel López, Rafael Gavara, and Pilar Hernández-Muñoz. 2021. "Hot-Melt-Extruded Active Films Prepared from EVOH/Trans-Cinnamaldehyde Blends Intended for Food Packaging Applications" Foods 10, no. 7: 1591. https://doi.org/10.3390/foods10071591

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