阿布茨
复合数
DPPH
极限抗拉强度
化学
淀粉
抗氧化剂
乙醇
食品科学
卡拉胶
材料科学
核化学
有机化学
复合材料
作者
Cuntang Wang,Yueyi Lu,Ziyu Li,Xuanzhe An,Zengming Gao,Shengxin Tian
出处
期刊:Polymers
[MDPI AG]
日期:2022-07-23
卷期号:14 (15): 2986-2986
被引量:8
标识
DOI:10.3390/polym14152986
摘要
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.
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