Abstract
The temperature and pH dual-responsive polyhedral oligomeric silsesquioxane/poly[2-(dimethylamino)-ethyl methacrylate]-b-poly(N-isopropylacrylamide) hybrid materials (POSS/PDMAEMA-b-PNIPAM) were synthesized via combination of thiol-ene click chemistry and reversible addition fragmentation chain transfer polymerization. Their structures and self-assembly behaviors were characterized via 1H NMR, TEM, UV-vis and DLS measurements. POSS/PDMAEMA-b-PNIPAM could self-assemble into thermo- and pH-sensitive micelles with the POSS heads forming as a core and the PDMAEMA-b-PNIPAM chains as a corona. In vitro drug release behavior of POSS/PDMAEMA-b-PNIPAM micelles loading camptothecin indicated that the rate of drug release could be effectively controlled by altering the temperature and pH values of the environment. As 80% of the camptothecin drug was released at pH 5.5 or temperature of 45 °C within 35 h, the excellent thermo- and pH-response ability of POSS/PDMAME-b-PNIPAM micelles makes them desirable candidates for controlled drug delivery systems.
| Original language | English |
|---|---|
| Pages (from-to) | 65-71 |
| Number of pages | 7 |
| Journal | Materials Chemistry and Physics |
| Volume | 179 |
| DOIs | |
| State | Published - 15 Aug 2016 |
| Externally published | Yes |
Keywords
- Chemical synthesis
- Critical phenomena
- Inorganic compounds
- Polymers
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