The diffusion study of Magnolia liliiflora essential oil microencapsulated in the Chitosan / Alginate Composites.
| Autor: | Hsiu-Lan Hsu, 徐秀蘭 |
|---|---|
| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 This thesis investigates the molding preparation of microcapsules magnolia essential oils and change the different parameters of the essential oil diffusion coefficient D values, the microcapsules with chitosan and sodium alginate as the shell material, natural magnolia The essential oil of the core material can be coated, cross-linked complex reaction experiment, positive and negative electrolyte gel, ionic crosslinking reaction Preparation of essential oils composite microcapsules. Magnolia the diffusion of essential oil concentration in the microcapsule -characteristics, compliance with the gas diffusion to the second law mode; experiment in the preparation of essential oil standard calibration curve standard essential oil concentration and release strength formula. Change of two calcium chloride, sodium alginate, chitosan, add the amount of the proportion of operating parameters, diffusion release model and the diffusion coefficient D value of impact composite microcapsules of essential oils. Between the various coverings, the composition ratio will affect the microcapsules of essential oils diffusion coefficient D values, especially the concentration of chitosan the greatest impact, make the microcapsules in the case of the lower concentration in the oil diffusion coefficient D The value 0.00262mm2/sec, when the chitosan concentration of 0.60% (w / w), microcapsules, essential oil diffusion coefficient D the value 0.000763mm2/sec. Affected by temperature, different values for the diffusion coefficient D at different temperatures, the D value of 0.002230 mm2/sec at 50℃，at 25℃，when the D value of 0.000646 mm2/sec. By simple adjustment microcapsules out hole diameter can be controlled particle size, and preparation of different particle size of microcapsules, the microcapsules of essential oils diffusion coefficient D value is .0986 mm2/sec. In order the microcapsules techniques to prepare essential oils microcapsule particles (gel beads,) really effectively coated essential oils diffusion release and diffusion coefficient D values of each parameter conditions. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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