alpha-Cyclodextrin/oil beads: an innovative self-assembling system.
Int J Pharm
; 339(1-2): 121-9, 2007 Jul 18.
Article
en En
| MEDLINE
| ID: mdl-17408890
ABSTRACT
The aim of this work was to characterise a new type of particulate system, named beads, prepared by a straightforward technique starting from a mixture of alpha-cyclodextrin aqueous solution and soybean oil without the use of any organic solvent or surface-active agent. Mechanisms involved in bead formation were also investigated. Optimal ratio between alpha-cyclodextrin (6%, w/w), soybean oil (19.6%, w/w) and water (74.4%, w/w) led to homogeneous bead size (1.6 mm) with a fabrication yield superior to 80% after a continuous external shaking during 2.5 days. After freeze-drying, oil and alpha-cyclodextrin contents were estimated at 80% (w/w) and 20% (w/w), respectively. X-ray diffraction studies revealed that beads presented a crystalline organisation and microscopic techniques showed that their inner structure was constituted by a matrix containing oily compartments. Beads offer interesting prospects for the microencapsulation of lipophilic and poorly stable molecules. Due to their semi-solid consistency and their ability to be freeze-dried, these beads have great potentialities for pharmaceutical (oral and topical routes) and cosmetic applications.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Aceite de Soja
/
Sistemas de Liberación de Medicamentos
/
Alfa-Ciclodextrinas
Idioma:
En
Revista:
Int J Pharm
Año:
2007
Tipo del documento:
Article
País de afiliación:
Francia