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Article

Preparation and Performance Characterization of a Composite Film Based on Corn Starch, κ-Carrageenan, and Ethanol Extract of Onion Skin

1
College of Food and Bioengineering, Qiqihar University, Qiqihar 161006, China
2
College of Food Science, Northeast Agricultural University, Harbin 150030, China
*
Author to whom correspondence should be addressed.
Academic Editor: Alexey V. Lyulin
Polymers 2022, 14(15), 2986; https://doi.org/10.3390/polym14152986
Received: 4 July 2022 / Revised: 19 July 2022 / Accepted: 20 July 2022 / Published: 23 July 2022
(This article belongs to the Section Polymer Membranes and Films)
Using corn starch (CS) and κ-carrageenan(κC) as the raw material and active composite, respectively, films containing different concentrations of ethanol extract of onion skin were prepared. The effects of different concentrations of ethanol extract of onion skin (EEOS) on the physicochemical properties, as well as the antioxidant and antibacterial properties, of CS/κC films were also discussed. The addition of ethanol extract of onion skin inhibited the recrystallization of starch molecules in the composite films. It affected the microstructure of the composite films. The color of the composite films was deepened, the brightness was reduced, and the opacity was increased. Water vapor permeability increased, tensile strength decreased, and elongation at the break increased. The glass-transition temperature decreased. The clearance of DPPH radicals and ABTS cation radicals increased. Moreover, when the concentration of EEOS was 3%, the antioxidant effect of the films on oil was greatly improved and could effectively inhibit Staphylococcus aureus and Escherichia coli. The above results showed that adding ethanol extract of onion skin improved the physicochemical properties and biological activities of the CS/κC composite films, so CS/κC/EEOS composite films can be used as an active packaging material to extend food shelf-life. These results can provide a theoretical basis for the production and application of corn starch/κ-carrageenan/ethanol extract of onion skin composite films. View Full-Text
Keywords: corn starch; κ-carrageenan; ethanol extract of onion skin; active film; physicochemical properties; biological activity corn starch; κ-carrageenan; ethanol extract of onion skin; active film; physicochemical properties; biological activity
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MDPI and ACS Style

Wang, C.; Lu, Y.; Li, Z.; An, X.; Gao, Z.; Tian, S. Preparation and Performance Characterization of a Composite Film Based on Corn Starch, κ-Carrageenan, and Ethanol Extract of Onion Skin. Polymers 2022, 14, 2986. https://doi.org/10.3390/polym14152986

AMA Style

Wang C, Lu Y, Li Z, An X, Gao Z, Tian S. Preparation and Performance Characterization of a Composite Film Based on Corn Starch, κ-Carrageenan, and Ethanol Extract of Onion Skin. Polymers. 2022; 14(15):2986. https://doi.org/10.3390/polym14152986

Chicago/Turabian Style

Wang, Cuntang, Yueyi Lu, Ziyu Li, Xuanzhe An, Zengming Gao, and Shengxin Tian. 2022. "Preparation and Performance Characterization of a Composite Film Based on Corn Starch, κ-Carrageenan, and Ethanol Extract of Onion Skin" Polymers 14, no. 15: 2986. https://doi.org/10.3390/polym14152986

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