期刊
FOOD CHEMISTRY
卷 142, 期 -, 页码 269-275出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2013.07.058
关键词
Thymol; Zein; Sodium caseinate; Chitosan hydrochloride; Nanoparticle; Antimicrobial activity
资金
- special fund for agro-scientific research in the public interest [201203069]
- National High Technology Research and Development Program of China [2013AA102202, 2013AA102207]
- Chinese Science Foundation [2012M511098, 2013T60450]
- SJTU 985-III disciplines platform and talent fund [TS0414115001, TS0320215001]
- Maryland Agricultural Experiment Station
- Wilmar company
Thymol-loaded zein nanoparticles stabilized with sodium caseinate (SC) and chitosan hydrochloride (CHC) were prepared and characterized. The SC stabilized nanoparticles had well-defined size range and negatively charged surface. Due to the presence of SC, the stabilized zein nanoparticles showed a shift of isoelectric point from 6.18 to 5.05, and had a desirable redispersibility in water at neutral pH after lyophilization. Coating with CHC onto the SC stabilized zein nanoparticles resulted in increased particle size, reversal of zeta potential value from negative to positive, and improved encapsulation efficiency. Both thymol-loaded zein nanoparticles and SC stabilized zein nanoparticles had a spherical shape and smooth surface, while the surfaces of CHC-SC stabilized zein nanoparticles seemed rough and had some clumps. Encapsulated thymol was more effective in suppressing gram-positive bacterium than un-encapsulated thymol for a longer time period. (C) 2013 Elsevier Ltd. All rights reserved.
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