Abstract
In this paper, a new pH/temperature sensitive beads with core-shelled structure, composed of sodium alginate and poly(N-acryloylglycinate), were prepared using as drug delivery carrier. Selecting indomethacin as a model drug, in vitro drug release behaviors were investigated at different temperatures, phosphate buffer solutions (PBS) and polymer content. At pH=2.1, the release amount of indomethacin loaded in the beads was only 2.46% while this value approached to 95.23% in pH=7.4 PBS. In addition, the release rate of indomethacin at 37°C is much higher than at 18°C.
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