期刊
CARBOHYDRATE POLYMERS
卷 96, 期 2, 页码 578-585出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.08.117
关键词
Chitosan; Encapsulation; Eugenol; Nanoparticle; Thermal stability
资金
- Research, Development and Engineering (RD&E) fund through The National Nanotechnology Center (NANOTEC)
- National Science and Technology Development Agency (NSTDA), Thailand [P-11-00114]
- Commission on Higher Education, Ministry of Education, Thailand (National Research University of Thailand)
The objective of the present work was to improve the thermal stability of eugenol by encapsulating into chitosan nanoparticles via an emulsion-ionic gelation crosslinking method. The influences of the initial eugenol content and tripolyphosphate (TPP) concentration on the loading capacity (LC), encapsulation efficiency (EE), morphology and surface charge of the eugenol-loaded chitosan nanoparticles were also investigated. LC and EE tended to increase with increasing initial eugenol content and decreasing TPP concentration. Particles with LC of 12% and EE of 20% exhibited a spherical shape with an average size of less than 100 nm. Thermal stability of the encapsulated eugenol was verified through its extrusion at 155 degrees C with a model plastic, i.e. thermoplastic flour (TPF). TPF containing encapsulated eugenol showed 8-fold higher remaining eugenol content and 2.7-fold greater radical scavenging activity than that containing naked eugenol. The results suggest the possible use of eugenol-loaded chitosan nanoparticles as antioxidants in bioactive plastics for food packaging. (C) 2012 Elsevier Ltd. All rights reserved.
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