| 초록 |
Complex coacervation is a liquid-liquid phase separation when two oppositely charged polyelectrolytes are mixed in an aqueous solution. Because of electrostatic interaction and entropic gain of counter ion release, the coacervates are highly responsive to ionic strength. In this study, complex coacervate core micelles (C3Ms) are formed by simple mixing of AB and A’B diblock copolyelectrolyte in an aqueous solution where A and A’ are oppositely charged blocks, and B is PEO block. We study the structure of C3Ms as a function of salt concentration and charged block length using dynamic light scattering (DLS) and small-angle X-ray/Neutron scattering (SAX/NS). We observed that the interfacial area per chain of C3Ms increases due to the reduced interfacial tension between coacervate cores and solvent at elevated salt concentration. In addition, the scaling relation between core radii and salt concentration is investigated by both experimental and theoretical description. |
