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Advisor(s)
Abstract(s)
In this work we have developed a process to encapsulate thyme oil using PLA as the
wall material. Firstly, an oil-in-water (o/w) emulsion stabilized with tween 20 (HLB of
16,7) and a solution of PLA in dimethylformamide (DMF) have been prepared.
Thereafter, the PLA solution was added to the previously prepared o/w emulsion. The
o/w emulsion was obtained by dispersion with an ultraturrax and the encapsulation
process proceeded under stirring using an impeller stirrer in a batch actor. The
microcapsules formed were hardened by adding octamethylcyclotetrasiloxane and
allowed to stand during one hour. After this step, they were decanted and washed with
pluronicÒ F68 solution (0.1% w/w), an ethanol solution (30% v/v), and hexane. Finally,
the microcapsules were freeze-dried during 24h.
Description
Keywords
Polylactide Thyme oil Coacervation Microencapsulation
Citation
Martins, I.M.; Barreiro, M.F.; Rodrigues, A.E. (2008-09) - Microencapsulation of thyme oil by coacervation. In International Chemical and Biological Engineering Conference - CHEMPOR 2008. 10. Braga. ISBN 978-972-97810-3-2
Publisher
Universidade do Minho