Ferulic acid-coupled chitosan: Thermal stability and utilization as an antioxidant for biodegradable active packaging film. (22nd January 2015)

• Record Type: Journal Article
• Authors: Woranuch, Sarekha; Yoksan, Rangrong; Akashi, Mitsuru
• Is Part Of: Carbohydrate polymers. Volume 115(2015)
• Page Start: 744
• Page End: 751
• Publication Date: 2015-01-22
• Subjects: Ferulic acid -- Chitosan -- Thermal stability -- Antioxidant -- Active packaging -- Biodegradable film; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2014.06.074
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Ferulic acid-coupled chitosan (FA-CTS) was successfully prepared by a carbodiimide-mediated coupling reaction. Coupling of ferulic acid onto chitosan could improve thermal stability of ferulic acid. Biodegradable films containing FA-CTS possessed improved oxygen barrier property and antioxidant activity. FA-CTS could potentially be used as an antioxidant for active packaging film. Abstract: 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 °C followed by blown film extrusion at temperatures up to 175 °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.