From Theory to Practice of Dynamic and Equilibrium Interfacial and Colloidal Properties

Interfaces are the boundary limits of at least two immiscible phases that include gas, liquid and solid, and are characterized by the interfacial free energy. Understanding their fundamental property modifications in deep manner is of great importance, regarding to scientific and application viewpoints. That allows us to control the formation and stabilization of colloidal systems, which consist in producing homogeneous dispersions from, at least, two initially immiscible phases. In this communication, the dynamic and equilibrium aspects of fluid and solid surfaces were theoretically reminded, and some applications related to surface-active biocompounds with short chain derivatives (hydrosolubles) by dynamic adsorption (Gibbs approach), and with long chain derivatives (liposolubles) through the spreading and compressed monolayer (Langmuir approach) were shown, respectively. A few examples of the most relevant relationships between fundamental properties and colloidal formation and stability consequences were presented.