Difference between revisions of "Sol-Gel Transition"

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Under Construction by Rebecca Perry
 
 
 
== Definition ==
 
== Definition ==
The sol-gel transition (also known as gelation) is simply a change from a liquid state to a gel state. In the liquid state, components in the liquid move about the liquid. In the gel state, these sub-units bond together to form a network extending through the whole substance. This network gives the material an elasticity, a solid-like property.
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The sol-gel transition (also known as gelation) is simply a change from a liquid state to a gel state. In the liquid state, components dispersed in the liquid are relatively free to move about. In the gel state, these sub-units bond together to form a network extending throughout the whole substance. This network gives the material an elasticity: a solid-like property [1, p. 95].
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The nature of the sub-units and the bonds between play an important role in the properties of the gel formed. [1, p. 95].
  
 
[[image: 780px-Wiki SolGel1.jpg|400px|thumb|left|This cartoon shows the free-floating subunits in the sol (liquid) state, and the network formed in the gel state. *From Wikimedia Commons]]
 
[[image: 780px-Wiki SolGel1.jpg|400px|thumb|left|This cartoon shows the free-floating subunits in the sol (liquid) state, and the network formed in the gel state. *From Wikimedia Commons]]
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-Pectin, (jam, jelly)
 
-Pectin, (jam, jelly)
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http://www.gi.alaska.edu/ScienceForum/ASF8/887.html
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http://www1.lsbu.ac.uk/water/hypec.html#fun
  
 
== References ==
 
== References ==
 
[1] R. Jones, "Soft Condensed Matter," Oxford University Press Inc., New York (2002).
 
[1] R. Jones, "Soft Condensed Matter," Oxford University Press Inc., New York (2002).
 
http://www.gi.alaska.edu/ScienceForum/ASF8/887.html
 
http://www1.lsbu.ac.uk/water/hypec.html#fun
 

Revision as of 15:39, 4 November 2009

Definition

The sol-gel transition (also known as gelation) is simply a change from a liquid state to a gel state. In the liquid state, components dispersed in the liquid are relatively free to move about. In the gel state, these sub-units bond together to form a network extending throughout the whole substance. This network gives the material an elasticity: a solid-like property [1, p. 95].

The nature of the sub-units and the bonds between play an important role in the properties of the gel formed. [1, p. 95].

This cartoon shows the free-floating subunits in the sol (liquid) state, and the network formed in the gel state. *From Wikimedia Commons

Examples

-Epoxy

-Gelatin

-Pectin, (jam, jelly) http://www.gi.alaska.edu/ScienceForum/ASF8/887.html http://www1.lsbu.ac.uk/water/hypec.html#fun

References

[1] R. Jones, "Soft Condensed Matter," Oxford University Press Inc., New York (2002).