| 초록 |
Typical colloidal particles strongly and irreversibly attach to fluid-fluid interfaces. There has been lots of studies to understand the Pickering emulsion systems with regard to the attachment energy of particles to fluid-fluid interfaces, interactions between interfacial particles, their assembly behaviors, and the rheological properties. To date, however, interactions between colloidal particles and fluid interfaces are barely investigated. Colloidal particles unlikely adsorb to oil-water or air-water interfaces due to electrostatic repulsions that arise from charge creation at the interfaces. The electrostatic repulsions between the particle and the interface can be controlled by adding electrolytes in the aqueous phase, allowing the particles spontaneously to attach to the interface. In this work, we use laser tweezers to quantitatively investigate the interactions between polystyrene microspheres and the oil-water interface, depending on the amount of electrolyte concentrations. |
