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
British Columbia, Canada
Order and disorder of bubbles in a surface foam
Bubble for hydrostatic pressure
Schematic stress-strain curve of an elastomeric foam, demonstrating the three regions which are linear elastic, cell-wall buckling, and cell-wall fracture, where the area under the curve specified represents the energy per unit volume the foam can absorb.
- Sponge-for-washing-1212612.jpg
Une éponge pour nettoyer.
Metal Foam in Scanning Electron Microscope, magnification 10x
- Closed cell metal foam with large cell size.JPG
An aluminium foam produced by the Shinko Wire Company (trade name Alporas) scanned from a sectioned aluminium foam specimen by user curran2 showing the larger end of the range of cell size
- FoamedPlastic.jpg
Micrograph of temper (memory) foam
References
- ↑ Lucassen, J. (1981). Lucassen-Reijnders, E. H. (ed.). Anionic Surfactants - Physical Chemistry of Surfactant Action. NY, USA: Marcel Dekker.
