|
authors |
Vilela, C; Pinto, RJB; Coelho, J; Domingues, MRM; Daina, S; Sadocco, P; Santos, SAO; Freire, CSR |
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nationality |
International |
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journal |
FOOD HYDROCOLLOIDS |
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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. |
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publisher |
ELSEVIER SCI LTD |
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issn |
0268-005X |
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year published |
2017 |
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volume |
73 |
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beginning page |
120 |
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ending page |
128 |
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digital object identifier (doi) |
10.1016/j.foodhyd.2017.06.037 |
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web of science category |
Chemistry, Applied; Food Science & Technology |
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subject category |
Chemistry; Food Science & Technology |
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unique article identifier |
WOS:000407027100013
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