期刊
FOOD CHEMISTRY
卷 279, 期 -, 页码 223-230出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2018.11.025
关键词
Ultrasound; Different model frequencies; Encapsulation; Zein-chitosan; Complex coacervation; Structural characteristics
资金
- National Natural Science Foundation of China [31771977, 31501427]
- China Postdoctoral Science Foundation [2018T110459, 2016M601742]
- Primary Research & Development Plan of Jiangsu Province [BE2017353]
- Open Project Program of State Key Laboratory of Food Science and Technology, Jiangnan University [SKLF-KF-201701]
- Foundation of Key Laboratory of Agricultural Products Physical Processing in Jiangsu Province [JAPP2014-3]
- Senior Professional Research Start-up Fund of Jiangsu University [14JDG180]
- Young Backbone Teachers Program of Jiangsu University
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
In this study, resveratrol was successfully encapsulated using zein-chitosan complex coacervation. The encapsulation efficiency was markedly improved (51.4%) after chitosan coating at 1:2.5 zein/chitosan ratio, compared with 38.6% using native zein. Analysis of multi-model frequency ultrasound treatment effects on resveratrol encapsulation using zein-chitosan complex coacervation showed that 28/40 kHz dual-frequency ultrasound led to the highest encapsulation efficiency (65.2%; 31.9% increase) and loading capacity (5.9%; 31.1% increase) of resveratrol, followed by multi-frequency ultrasound at 20/28/40 kHz (17.8% encapsulation efficiency increase; 17.8% loading capacity increase). Dual-frequency ultrasound treatment significantly reduced the zein-chitosan complex coacervation particle size and reduced their distribution, however, did not change the zeta potential. Fourier transform infrared spectroscopy and fluorescence spectroscopy analysis demonstrated that ultrasound treatment had no effect on secondary structure of zein-chitosan complex but markedly decreased the fluorescence emission intensity. Differential scanning calorimetry and X-ray diffraction results indicated that Dual-frequency ultrasound treatment improved the thermal stability of zein-chitosan complex coacervation but had no effect on the crystal structure. Atomic force microscopy and scanning electron microscopy images revealed uniform distribution of zein-chitosan complex coacervation followed by ultrasonic treatment.
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