Journal
CARBOHYDRATE POLYMERS
Volume 115, Issue -, Pages 744-751Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.06.074
Keywords
Ferulic acid; Chitosan; Thermal stability; Antioxidant; Active packaging; Biodegradable film
Categories
Funding
- Thailand Research Fund (TRF) [PHD/0050/2553]
- Kasetsart University through Royal Golden Jubilee Ph.D. program [PHD/0050/2553]
- Commission on Higher Education, Ministry of Education, Thailand (National Research University of Thailand)
- Kasetsart University Research and Development Institute, Thailand [SRU 3.55]
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The aim of the present research was to study the thermal stability of ferulic acid after coupling onto chitosan, and the possibility of using ferulic acid-coupled chitosan (FA-CTS) as an antioxidant for biodegradable active packaging film. FA-CTS was incorporated into biodegradable film via a two-step process, i.e. compounding extrusion at temperatures up to 150 degrees C followed by blown film extrusion at temperatures up to 175 degrees C. Although incorporation of FA-CTS with a content of 0.02-0.16% (w/w) caused decreased water vapor barrier property and reduced extensibility, the biodegradable films possessed improved oxygen barrier property and antioxidant activity. Radical scavenging activity and reducing power of film containing FA-CTS were higher than those of film containing naked ferulic acid, by about 254% and 94%, respectively. Tensile strength and rigidity of the films were not significantly affected by the addition of FA-CTS with a content of 0.02-0.08% (w/w). The above results suggested that FA-CTS could potentially be used as an antioxidant for active packaging film. (C) 2014 Elsevier Ltd. All rights reserved.
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