期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 182, 期 -, 页码 545-553出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2021.04.063
关键词
Active packaging; Chitosan film; Luteolin; Nanoemulsions; Release behavior
资金
- National Natural Science Foundation of China [31571788]
Luteolin-loaded nanoemulsions showed high stability and encapsulation efficiency. Incorporating nano-encapsulated luteolin into chitosan-based film enhanced water vapor and oxygen barrier abilities, while slowing down the release rate in fatty food simulant.
Luteolin is a flavone with potent antioxidant and antimicrobial activities. In this study, luteolin was encapsulated in oil-in-water nanoemulsions that were emulsified by glycerol monooleate and Tween 20. Results showed 68 mg luteolin-loaded nanoemulsions had the highest stability (zeta potential of -;39.8 mV) and encapsulation efficiency (89.52%). Then, active packaging films were developed by incorporating free or nano-encapsulated luteolin into chitosan-based matrix. The microstructure, physical and functional properties of CS film containing free luteolin (CS-LL) or nano-encapsulated luteolin (CS-LLNEs) were compared. Different from CS film, CS-LL and CS-LLNEs films had compact inner microstructure and strengthened intermolecular interactions. Moreover, CS-LLNEs film was more homogenous and compact than CS-LL film. As a result, CS-LLNEs film presented higher water vapor and oxygen barrier abilities and mechanical properties in comparison with CS-LL film. In addition, CS-LLNEs film showed slower release rate of luteolin in 95% ethanol (fatty food stimulant) as compared with CS-LL film. The controlled release of luteolin from film matrix could guarantee CS-LLNEs film to exert antioxidant activity up to 10 days. Our results suggest CS-LLNEs film can be developed as an emerging active packaging ma-terial that has potential applications in food industry. (c) 2021 Elsevier B.V. All rights reserved.
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