| 초록 |
Complex coacervates are polymer-rich phases of liquid-liquid phase separation when oppositely charged polyelectrolytes are mixed in aqueous solutions. Previously, Voorn-Overbeek(VO) model was proposed to capture the behavior of complex coacervates. Since the VO model does not account for the chain connectivity and chemistry-specific details, advanced models have been suggested up to now. However, experimental data of model system is rare to compare with the theoretical description. In this study, 4 polyelectrolytes(e.g.,strong/weak and polyanion/polycation)are prepared and thus 4 pairs of complex coacervates are investigated to map out the phase diagrams as a function of the ion pair. Each diagram shows distinctive features including salt resistance and the area of two-phase region depending on the pairs of polyelectrolytes. Also MD simulation results support these experimental observations, confirming that chemical-specific parameters play an important role to control phase behavior. |
