Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/19200
Title: Encapsulation of essential oils in SiO2 microcapsules and release behaviour of volatile compounds
Author: Sousa, F. L.
Santos, M.
Rocha, S. M.
Trindade, T.
Keywords: WATER-SOLUBLE HERBICIDE
MICROENCAPSULATION TECHNIQUES
INTERFACIAL REACTION
SILICA MICROSPHERES
CITRONELLA OIL
RETENTION
LEMON
EMULSIONS
LIMONENE
FOODS
Issue Date: 2014
Publisher: TAYLOR & FRANCIS LTD
Abstract: Natural substances derived from plants such as essential oils (EOs) are used in a variety of applications such as in the release of fragrances or active substances in cosmetics, in food industries to protect sensitive ingredients against oxidative processes and as antimicrobial agents. However, the labile and volatile nature of EOs reduces their activity during application or storage. Here, the microencapsulation of EOs in silica capsules was investigated as a mean to control the fast release of their volatile constituents. The preparation of silica capsules with oil cores was obtained by employing a sol-gel method to oil-in-water-in-oil (O/W/O) multiple emulsions. The volatile release from the SiO2 capsules was investigated by comprehensive two-dimensional gas chromatography with time of flight mass spectrometry detection (GC x GC-ToFMS). This research demonstrates that the SiO2 capsules have selectively encapsulated the different volatile species and the corresponding release profiles depend on the chemical properties of each component.
Peer review: yes
URI: http://hdl.handle.net/10773/19200
DOI: 10.3109/02652048.2014.911376
ISSN: 0265-2048
Publisher Version: 10.3109/02652048.2014.911376
Appears in Collections:CICECO - Artigos



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