| 초록 |
Surface modification of CaCO₃nanoparticles treated by Methyltrimethoxysilane (MTMS) has been studied and the impact of this on foam and emulsion stability has been investigated. Active ratio was measured through a floating test and contact angle analysis was conducted to assess the extent of hydrophobization of particles. Based on our findings from contact angle measurements, CaCO₃particles range from hydrophilic to hydrophobic depending on the extent of chemisorbed silane on their surfaces. In unmodified CaCO₃nanoparticle-surfactant mixture, foam stability has improved compared to a surfactant-only system. Next, a investigation into the influence of the wettability, nanometer-sized CaCO₃particles on the type and stability of water−decane emulsions is described. We demonstrate that for emulsions stabilized by modified CaCO₃particles, phase inversion from o/w to w/o occurs at the same dispersed phase volume fraction. |
