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Preparations and Release Property of Poly(ε-caprolacton)/ethyl cellulose Microcapsule Containing Pluronic F127  

Hong, Yeon Ji (School of Biotechnology & Bioengineering and Institute of Bioscience and Biotechnology, Kangwon National University)
Kim, Jin-Chul (School of Biotechnology & Bioengineering and Institute of Bioscience and Biotechnology, Kangwon National University)
Publication Information
Applied Chemistry for Engineering / v.20, no.6, 2009 , pp. 632-637 More about this Journal
Abstract
Poly(${\varepsilon}-caprolacton$)/ethyl cellulose (PCL/EC) microcapsules containing pluronic F127 were prepared by a spray drying method. The aqueous phase, 20% of pluronic F127 was dissolved in distilled water, and the organic phase, 5% of PCL and EC were dissolved in dichloromethane. The microcapsules were obtained by spray drying the water-in-oil (W/O) emulsion. According to the data of scanning electron microscopy and particle analyzer, tens of micro size microcapsules were observed. On a differential scanning calorimeter, the phase transition temperatures of microcapsules were observed and they were found around those of pluronic F127 and poly(${\varepsilon}-caprolacton$), which were the main components of the microcapsules. At the range of $30{\sim}45^{\circ}C$, temperature-dependent release properties were investigated using fluorescein isothicyanate-dextran (FITC-dextran) and blue dextran as a model drug. When the temperature was increased, the degree of release of microcapsule was also increased. FITC-dextran, the relative low molecular weight, was more released than blue-dextran.
Keywords
pluronic F127; ethyl cellulose; poly(${\varepsilon}-caprolacton$); spray-dry; microcapsules;
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