authors |
Vilela, C; Pinto, RJB; Coelho, J; Domingues, MRM; Daina, S; Sadocco, P; Santos, SAO; Freire, CSR |
nationality |
International |
journal |
FOOD HYDROCOLLOIDS |
author keywords |
Active packaging; Antioxidant activity; Antimicrobial activity; Chitosan; Ellagic acid; UV protection |
keywords |
DRUG-DELIVERY-SYSTEM; ELLAGIC ACID; ESSENTIAL OILS; ANTIOXIDANT PROPERTIES; IN-VITRO; ANTIBACTERIAL; NANOPARTICLES; METABOLITES |
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. |
publisher |
ELSEVIER SCI LTD |
issn |
0268-005X |
year published |
2017 |
volume |
73 |
beginning page |
120 |
ending page |
128 |
digital object identifier (doi) |
10.1016/j.foodhyd.2017.06.037 |
web of science category |
Chemistry, Applied; Food Science & Technology |
subject category |
Chemistry; Food Science & Technology |
unique article identifier |
WOS:000407027100013
|