Development of a Sword Bean (Canavalia gladiata) Starch Film Containing Goji Berry Extract

Development of environment-friendly films using natural biopolymers such as carbohydrates has increased because of environmental problems caused by synthetic plastics. This study examined the physical and antioxidative properties of biodegradable films from sword bean starch (SBS) containing goji be...

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Bibliographic Details
Published in:Food and bioprocess technology 2020-05, Vol.13 (5), p.911-921
Main Authors: Kim, Sujin, Kang, Ji-Hoon, Song, Kyung Bin
Format: Article
Language:English
Subjects:
Agriculture
Antioxidants
Beans
Bioactive compounds
Biodegradability
Biodegradation
Biopolymers
Biotechnology
Carbohydrates
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Elongation
Food industry
Food packaging
Food packaging industry
Food Science
Fruits
Original Paper
Phenolic compounds
Phenols
Polymers
Polyphenols
Properties (attributes)
Scavenging
Starch
Sulfonic acid
Tensile strength
Thermal stability
Ultraviolet radiation
Zeaxanthin
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Summary:Development of environment-friendly films using natural biopolymers such as carbohydrates has increased because of environmental problems caused by synthetic plastics. This study examined the physical and antioxidative properties of biodegradable films from sword bean starch (SBS) containing goji berry extract (GBE) to develop a novel antioxidant film. As the GBE concentration increased, the tensile strength of the SBS films decreased from 26.32 to 12.42 MPa; however, the elongation at break increased from 7.39 to 12.36%. Although water barrier properties and thermal stability of SBS films were not enhanced by the addition of GBE, ultraviolet/visible light barrier and antioxidant properties were remarkably improved due to its bioactive compounds, specifically zeaxanthin and various polyphenols. In particular, 2,2-diphenyl-1-picrylhydrazyl and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical scavenging activities of the SBS film with 1.0% GBE were the highest among the films, which were consistent with the total phenolic content results. Therefore, the developed SBS films with GBE are applicable as new antioxidant films in the food packaging industry.
ISSN:1935-5130
1935-5149
DOI:10.1007/s11947-020-02447-4