Foam
A foam is a substance that is formed by trapping gas in bubbles. Gas is present in large amounts so it will be divided in gas bubbles separated by liquid regions which may form films, thinner and thinner when the liquid phase is drained out of the system.[1] When the scale is small, e.g. for fine foam, this dispersed medium can be considered as a type of colloid.
Foam Media
Order and disorder of bubbles in a surface foam
Schematic stress-strain curve of an elastomeric foam, demonstrating the three regions which are linear elastic, cell-wall buckling, and cell-wall fracture. The area under the curve specified represents the energy per unit volume the foam can absorb.
Bubble for hydrostatic pressure
Reflection of radiation by a foam
Measurement principle of multiple light scattering coupled with vertical scanning
References
- ↑ Lucassen, J. (1981). Lucassen-Reijnders, E. H. (ed.). Anionic Surfactants - Physical Chemistry of Surfactant Action. NY, USA: Marcel Dekker.
