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Difference between revisions of "Micelle"

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== Formation ==
 
== Formation ==
  
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The micelle packing parameter equation is utilized to help "predict molecular self-assembly in surfactant solutions":<ref name="r2">Nagarajan, R. 2002. "Molecular Packing Parameter and Surfactant Self-Assembly: The Neglected Role of the Surfactant Tail†". Langmuir 18: 31. http://pubs.acs.org/doi/abs/10.1021/la010831y</ref>
  
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[[File:Micelle Packing Eq.png|left|text-top|Micelle packing eq.]]
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where [[File:Vo.png|top]]&nbsp;<span style="line-height: 1.6;">is the surfactant tail volume, [[File:Lo.png|top]]&nbsp;is the tail length, and [[File:Ae.png|top]]&nbsp;is the equilibrium area per molecule at the aggregate surface.</span>
  
 
== Role in oil emulsion ==
 
== Role in oil emulsion ==

Revision as of 12:54, 29 December 2015

Micelles (singular "micelle"), or micellae (singular "micella"), are spherical clusters of hydrocarbon molecules that act as emulsifying agents. A typical micelle in aqueous solution forms an aggregate with the hydrophilic "head" regions in contact with surrounding solvent, sequestering the hydrophobic single-tail regions in the micelle centre. This type of micelle is known as a normal-phase micelle (oil-in-water micelle). An Inverse micelle has a hyprophobic and hydrophilic side, with the hyrodphilic side at the center and the hydrophobic side facing the solvent. Micelles are approximately spherical in shape. Other phases, including shapes such as ellipsoids, cylinders, and bilayers, are also possible. The shape and size of a micelle are a function of the molecular geometry of its surfactant molecules and solution conditions such as surfactant concentration, temperature, pH, and ionic strength. The process of forming micelles is known as micellisation and forms part of the phase behaviour of many lipids according to their polymorphism.[1]

Micelle - Villarreal, Mariana Ruiz 2007


Formation

The micelle packing parameter equation is utilized to help "predict molecular self-assembly in surfactant solutions":[2]

Micelle packing eq.



where Vo.png is the surfactant tail volume, Lo.png is the tail length, and Ae.png is the equilibrium area per molecule at the aggregate surface.

Role in oil emulsion

Detection

References

  1. Micelle. 2015. In Wikipedia, The Free Encyclopedia. https://en.wikipedia.org/w/index.php?title=Micelle&oldid=694423373
  2. Nagarajan, R. 2002. "Molecular Packing Parameter and Surfactant Self-Assembly: The Neglected Role of the Surfactant Tail†". Langmuir 18: 31. http://pubs.acs.org/doi/abs/10.1021/la010831y

Noteworthy papers in OnePetro

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External links

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See also

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