Difference between revisions of "Critical Micelle Concentration"

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== Definition ==
 
== Definition ==
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The Critical [[Micelle]] Concentration (CMC) is the concentration of [[surfactants]] in a solution above which micelles form out of any additional surfactant added to the system. Below the CMC, surfactants adsorb to an interface, lowering the interfacial tension, or disperse within the bulk. There may be an occasional micelle formed below the CMC. Likewise, above the CMC, a very limited amount of added surfactants may enter the dispersed phase or adsorb onto an interface. However, above the CMC, the vast majority of added surfactant will form micelles.
  
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The Critical Micelle Concentration is related to the law of mass action. In chemistry, we look at the law of mass action to see how much of a reactant (individual surfactants) will form a product (micelles). Below the CMC, almost no micelles form, while above it, lots of micelles form
 
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-law of mass action
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== Applications ==
 
== Applications ==

Revision as of 12:17, 27 October 2009

Under Construction by Rebecca Perry

Definition

The Critical Micelle Concentration (CMC) is the concentration of surfactants in a solution above which micelles form out of any additional surfactant added to the system. Below the CMC, surfactants adsorb to an interface, lowering the interfacial tension, or disperse within the bulk. There may be an occasional micelle formed below the CMC. Likewise, above the CMC, a very limited amount of added surfactants may enter the dispersed phase or adsorb onto an interface. However, above the CMC, the vast majority of added surfactant will form micelles.

The Critical Micelle Concentration is related to the law of mass action. In chemistry, we look at the law of mass action to see how much of a reactant (individual surfactants) will form a product (micelles). Below the CMC, almost no micelles form, while above it, lots of micelles form

Applications

http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADD095344 http://www.mrsec.wisc.edu/Edetc/nanolab/micelle/index.html

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).