Abstract
In this work, the calcium alginate microcapsules containing lemon oil were prepared by emulsification-internal gelation, and their potential use as aromatherapy was examined by the controlled release system. The lemon oil encapsulated in the alginate was successfully observed by Fourier transform (FT-IR) spectroscopy and differential scanning calorimeter (DSC) measurements. Analysis of the diameters and shapes of microcapsules was conducted by scanning electron microscopy (SEM). The mean diameters ranging from 4 to 7 μm and encapsulation yield ranging from 50 to 85% were obtained. The controlled release of the lemon oil at 37°C was demonstrated by the infrared moisture determination (IMDB). It was found that the amount of released lemon oil decreased with increasing concentrations of alginate and CaCl2 due to the higher the cross-linking density of the capsules prepared. The oil release from the capsule was measured as a function of physical force. We confirmed that the external factor could control the collapse of capsule wall and the release rate.
Original language | English |
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Pages (from-to) | 369-374 |
Number of pages | 6 |
Journal | Polymer (Korea) |
Volume | 29 |
Issue number | 4 |
State | Published - Jul 2005 |
Externally published | Yes |
Keywords
- Calcium alginate
- Emulsification-internal gelation
- Infrared moisture determination
- Microcapsule