| 초록 |
We first introduce a robust and straightforward approach to fabricate novel nanoemulsion films with controlled Spinodal decomposition behaviors. For this, we produced an extremely stable nanoemulsion fluid, in which the amphiphilic block copolymer, poly(ethylene oxide)-block-poly(ε-caprolactone) (PEO-b-PCL), is tightly packed with lecithin, thereby forming a mechanically robust thin-film at the oil-water interface. The molecular association of PEO-b-PCL with lecithin is critical for formation of a tighter and denser molecular assembly at the interface, which is systematically confirmed by T2 relaxation and DSC analyses. Then, the nanoemulsion drops were alternatively layered with polyelectrolytes by utilizing the layer-by-layer deposition technology. Finally, we experimentally demonstrated that the emulsion films fabricated in this study exhibited the Spinodal decomposition. This intriguing phase behavior enabled the controlled release of active compounds from the emulsion film. |
