期刊
CARBOHYDRATE POLYMERS
卷 86, 期 4, 页码 1602-1609出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2011.06.074
关键词
Chitosan; Fragrance; Controlled release; Nanospheres; Imine; Profragrance
资金
- Development and Promotion of Science and Technology talents project (DPST)
- Commission of Higher Education-Thailand Research Fund [BRG5280004]
- Chulalongkorn University
- Thai Government under Comprehesive Center for Innovative Food, Health Products and Agriculture [TKK2555]
Existing fragrance controlled release systems are either based on a physical barrier, such as entrapment of the fragrant molecules inside the micro- or nano-spheres, or a chemical barrier, such as labile chemical bonds. Here, we propose a system with a combination of the two approaches but fabricated via a simple surfactant free one step process using biodegradable chitosan polymer. The fabrication process involves a chemical reaction to covalently link the fragrant aldehydes with the amine functionalities of the N-succinylchitosan (NS-chitosan) carriers that simultaneously leads to an ultrasonic aided reorganization of the spheres in such a way that the grafted entities are at the particles' core. Localization of the grafted imine moieties at the core of the imine-NS-chitosan particles was confirmed by X-ray photoelectron spectroscopy (XPS) analysis. The obtained fragrant chitosan nanospheres not only showed up to 85-fold fragrance prolongation but also dispersed well in water. (C) 2011 Elsevier Ltd. All rights reserved.
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