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Zhu, Shenmin; Zhou, Zhengyang; Zhang, Di; Jin, Chan; Li, Zhiqiang
Microporous and mesoporous materials, 11/2007, Volume: 106, Issue: 1Journal Article
A novel responsive carrier system based on ordered mesoporous silica SBA-15 was synthesized, with magnetic particles formed in situ and thermo-sensitive poly( N-isopropyl acrylamide) (PNIPA) polymerized inside the pores. It was interesting to find that the obtained system held a relatively large pore diameter (3.8 nm) and pore volume (0.47 cm 3 g −1), which would benefit for drug storage with relatively large molecules. The delivery system displayed a hysteresis loop with a saturation magnetization ( M s) of 0.40 emu/g, which revealed the magnetic property of the prepared system. In vitro test of ibuprofen (IBU) loading and release exhibited a pronounced transition at around 17 °C, indicating a typical thermo-sensitive release property for this delivery system.
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