期刊
FOOD HYDROCOLLOIDS
卷 30, 期 2, 页码 487-494出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2012.07.019
关键词
Zein; Encapsulation; Core shell; EISA; SEM; TEM; Citral; Lime flavor; FTIR; Raman spectroscopy
资金
- U.S. Department of Energy [DEFG02-91-ER45439]
- PepsiCo Long Term Research
Core-shell structures are of interest for encapsulation purposes in the food, pharmaceutical, and cosmetics industries. A number of wall materials are in use including carbohydrates, lipids, and proteins. Zein, the prolamin of corn, is capable of self-assembly into microspheres, potentially useful in encapsulation and delivery systems. In previous work, zein was observed to form core-shell structures with citral and lime by evaporation induced self-assembly of zein in ethanol-water. The objectives of this work were to investigate the effect of mass ratio of core to shell materials and ethanol content of the solvent on encapsulation microstructure. Scanning electron microscopy (SEM), focused ion beam (FIB), and transmission electron microscopy (TEM) were used for structure characterization. Raman spectroscopy and FTIR were used to detect citral or lime in the core. Microstructure images suggested that core-shell structures of zein loaded with lime flavor were formed only in a narrow range of core to shell mass ratio. Ethanol content also affected structure formation. (C) 2012 Elsevier Ltd. All rights reserved.
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