| 초록 |
Particle-stabilized emulsions can be obtained by adsorption of colloidal particles, lowering interfacial tension and stabilizing the fluid interface. Intensive studies have been performed to understand the Pickering emulsion system with regard to interactions between interfacial particles, assemblies, and rheological properties. However, the interactions between colloidal particles and fluid interfaces have been rarely studied to date. The adsorption of colloidal particles to fluid interfaces can be suppressed due to electrostatic repulsions between the charged particles and the interface that is negatively charged. The magnitude of the electrostatic repulsion can be tuned by adding an electrolyte to the aqueous phase, leading to adsorption of the particles to the interface. In this study, we use optical laser tweezers to quantitatively investigate the interaction between the polystyrene microspheres and the oil-water interface depending on the amount of electrolyte concentration. |
