Encapsulation of essential oils in SiO2 microcapsules and release behaviour of volatile compounds
authors Sousa, FL; Santos, M; Rocha, SM; Trindade, T
nationality International
journal JOURNAL OF MICROENCAPSULATION
author keywords Essential oils; microencapsulation; silica; O/W/O multiple emulsion
keywords WATER-SOLUBLE HERBICIDE; MICROENCAPSULATION TECHNIQUES; INTERFACIAL REACTION; SILICA MICROSPHERES; CITRONELLA OIL; RETENTION; LEMON; EMULSIONS; LIMONENE; FOODS
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.
publisher TAYLOR & FRANCIS LTD
issn 0265-2048
year published 2014
volume 31
issue 7
beginning page 627
ending page 635
digital object identifier (doi) 10.3109/02652048.2014.911376
web of science category Chemistry, Applied; Engineering, Chemical; Pharmacology & Pharmacy
subject category Chemistry; Engineering; Pharmacology & Pharmacy
unique article identifier WOS:000343927700002
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journal analysis (jcr 2017):
journal impact factor 1.793
5 year journal impact factor 1.902
category normalized journal impact factor percentile 43.007
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