Abstract
mPEG-PLLA (poly l-lactic acid) is synthesized by ring-opening polymerization of lactide and conjugation with mPEG. Sebacic acid is modified with acetic anhydride and condensed with mPEG to form mPEG-PSA (poly sebacic anhydride). The micelles formed by mPEG-PLLA are characterized by slow degradation and low drug encapsulation efficiency; on the contrary, mPEG-PSA micelles are characterized by rapid degradation but high encapsulation efficiency. They can merge into spherical micelles (Φ = 140 nm) by self-assembly in water. The mixed micelles can successfully encapsulate a typical hydrophobic drug (curcumin), and significantly improve its solubility. Experimental results show that the mixed micelles have the features of high encapsulation efficiency and slow degradation.
| Original language | English |
|---|---|
| Pages (from-to) | 846-855 |
| Number of pages | 10 |
| Journal | Reactive and Functional Polymers |
| Volume | 72 |
| Issue number | 11 |
| DOIs | |
| State | Published - 11 2012 |
Keywords
- Diblock copolymers
- Drug delivery system
- Mixed micelles
- Polyanhydride
- Self-assembly