Temperature Dependence of the Micelle Size

For ionic amphiphiles it seems to be a general trend that, although the CMC is rather insensitive to temperature changes, the tendency to form micelles larger than spher- 

The occurrence of two phases at the higher temperature shows that there is a net attraction between the micelles. Since the clouding is a general phenomenon it appears that the attraction is not due to specific effects but could be caused by van der Waals forces. This interaction is temperature independent and one has also to invoke a temperature dependent repulsive force which might be due to the repulsion between water molecules in the solvation shells of the micelles137, 176). 

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