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Colloidal chemistry - interpretation of lecture notes

  • Thread starter superwolf
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  • #1
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258lz47.jpg


How do you interpret this?
 

Answers and Replies

  • #2
My guess is:

  • Greater than 8 surfactant molecules are required to form a functional micelle.
  • Non-ionic surfactant behaviour is affected by solution temperature.
  • Ionic surfactant behaviour is affected by electrolytes in solution.
 
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  • #3
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Seems reasonable :)
 
  • #4
chemisttree
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What it really means is that you need at least 8 carbons in your alkyl chain before you start to form stable micelles. It isn't impossible for C7 compounds to do it but http://pubs.acs.org/doi/abs/10.1021/jm00228a025" [Broken]

The other part of your notes can be interpreted as: As you change the temperature in solutions of non-ionic surfactants you can see different behavior (different behavior = changes in CMC for example). In ionic surfactants, electrolytes can cause these changes as well (as does temperature but they are not as sensitive to temperature as the non-ionic ones).
 
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