Abstract
The purpose of the study was to prepare and evaluation chitosin-coated alginate/gelatin microspheres for sustained-release drug delivery system in vitro. The microspheres were prepared with an emulsification technique, characterized by scanning electron microscopy (SEM), Fourier transform infrared spectrophotometry (FT-IR), differential scanning calorimetry (DSC). The average particle size of the chitosan-coated alginate/gelatin microspheres was uniform. The results of FT-IR and DSC showed that the microspheres were formed by intermolecular cross-linkages between chitosan and gelatin. The results also implied that the microsphere were a practicable dosage form to increase drug loading ratio for the poorly water-soluble drugs by encapsulated with chitosan. In vitro release of the microsphere indicated that it had a satisfactory sustained-release behavior for the sustained-release drug delivery system.
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