Difference between revisions of "Colloidal Dispersion"
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== Examples == | == Examples == | ||
| − | Paint | + | *Paint |
| − | Ink | + | *Ink |
| − | + | *[Colloidal Silver http://nccam.nih.gov/health/silver/ Colloidal Silver] | |
| − | Mayonnaise | + | *Mayonnaise |
== References == | == References == | ||
Revision as of 23:34, 12 September 2009
Definition
Colloidal dispersions are a class of soft materials. The term typically refers to a material consisting of solid particles spread throughout a fluid. According to Jones [1, p. 49], colloidal particles must have dimensions on the order of 10<math>\mu</math>m or smaller.
Witten [2, p. 113] distinguishes between colloids (solid particles in liquid), emulsions (liquid drops in another liquid), and foams (gas bubbles in a liquid), while Jones [1, p. 1] includes emulsions as a subgroup of colloidal dispersions. One can also find definitions of colloidal dispersions which include other combinations of solid, liquid, and gas phases.
Examples
- Paint
- Ink
- [Colloidal Silver http://nccam.nih.gov/health/silver/ Colloidal Silver]
- Mayonnaise
References
[1] R. Jones, "Soft Condensed Matter," Oxford University Press Inc., New York (2002).
[2] T. Witten, "Structured Fluids: Polymers, Colloids, Surfactants," Oxford University Press Inc., New York (2004).
