Bioactive chitosan/ellagic acid films with UV-light protection for active food packaging

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abstract

Homogeneous, translucent and flexible films of chitosan (CH) and ellagic acid (EA) were prepared by solvent casting. Various concentrations of EA (0.5, 1.0, 2.5 and 5.0% w/w relative to CH) were used in order to evaluate their UV-blocking properties. In addition, the photochemical stability of the films was also studied via artificial solar light irradiation. These set of films display high mechanical properties (Young's modulus = 3.21e3.57 GPa), thermal stability up to 215e220 degrees C, UVA-and UVB-barrier properties, moderate water vapor permeability (WVP = 2.82e3.70 g mm m(-2) day(-1) kPa(-1)) and maximum antioxidant activity around 28% (DPPH scavenging activity). Furthermore, all CH/EA films show antimicrobial activity against food-borne pathogens such as Gram-positive (Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa) bacteria due to the CH antimicrobial effectiveness. These bioactive UV-blocking CH/EA films open the way to materials with potential for eco-friendly active packaging. (C) 2017 Elsevier Ltd. All rights reserved.

keywords

DRUG-DELIVERY-SYSTEM; ELLAGIC ACID; ESSENTIAL OILS; ANTIOXIDANT PROPERTIES; IN-VITRO; ANTIBACTERIAL; NANOPARTICLES; METABOLITES

subject category

Chemistry; Food Science & Technology

authors

Vilela, C; Pinto, RJB; Coelho, J; Domingues, MRM; Daina, S; Sadocco, P; Santos, SAO; Freire, CSR

our authors

foto Carla Vilela

Carla Vilela

Assistant Professor
foto Carmen Sofia da Rocha Freire Barros

Carmen Sofia da Rocha Freire Barros

Coordinating Researcher
foto Ricardo Pinto

Ricardo Pinto

Researcher
foto Sónia Andreia Oliveira Santos

Sónia Andreia Oliveira Santos

Assistant Researcher

Groups

G4 - Renewable Materials and Circular Economy

Projects

CICECO - Aveiro Institute of Materials (UID/CTM/50011/2013)

acknowledgements

This work was developed within the scope of the project CICECO - Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (FCT Ref. UID/CTM/50011/2013), financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement. The Portuguese Foundation for Science and Technology (FCT) is also acknowledged for the postdoctoral grants to C. Vilela (SFRH/BPD/84168/2012), R. J. B. Pinto (SFRH/BPD/89982/2012) and S. A. O. Santos (SFRH/BPD/84226/ 2012), and contract under Investigador FCT to C. S. R. Freire (IF/ 01407/2012).

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Publication Details

type
Journal Article
year
2017
journal
FOOD HYDROCOLLOIDS
volume
73
publisher
ELSEVIER SCI LTD
issn
0268-005X
digital object identifier
10.1016/j.foodhyd.2017.06.037
web of science article identifier
WOS:000407027100013

Journal Metrics (JCR 2019)

Journal Impact Factor
7.053
Journal Impact Factor (5 yrs)
7.077
category normalized journal percentile
95.917

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