Abstract
We report new results of small-angle neutron scattering from cyclohexane- d 12/lecithin/water micellar solutions, performed as a function of the water content, w 0, the temperature, T and the dispersed-phase volume fraction, ф. The data from dilute samples can be interpreted in terms of the existence of giant cylindrical reverse micelles, in good agreement with the current idea of an unlimited micellar growth with ф. In contrast, the appearance of a sharp interference maximum at high concentrations ( ф > 0.15) suggests that the current hypothesis of a gel structure interpreted as a random network of entangled micelles can be assumed to be incorrect, and that there must be some caution in assuming analogies with neutral polymer-like systems.
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