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The shape of a micelle is directly dependent on the packing parameter of the surfactant. Surfactants with a packing parameter of N S {\displaystyle N_{\text{S}}} ≤ 1/3 appear to have a cone-like shape which will pack together to form spherical micelles when in an aqueous environment (top in figure).
The formation of micelles can be understood using thermodynamics: Micelles can form spontaneously because of a balance between entropy and enthalpy. In water, the hydrophobic effect is the driving force for micelle formation, despite the fact that assembling surfactant molecules is unfavorable in terms of both enthalpy and entropy of the system ...
In 1976, the fundamental theory for understanding the mechanism of micelle formation was developed by Tanford's free energy model. [18] Apart from integrating all relevant physicochemical elements and explaining the growth of micells, he provided a comprehensive reasoning of why micelles are finite in terms of opposing interactional forces. [19 ...
In colloidal and surface chemistry, the critical micelle concentration (CMC) is defined as the concentration of surfactants above which micelles form and all additional surfactants added to the system will form micelles. [1] The CMC is an important characteristic of a surfactant.
In colloidal chemistry, the Krafft temperature (or Krafft point, after German chemist Friedrich Krafft) is defined as the minimum temperature at which the formation of micelles occurs in a solution of dissolved surfactant. It has been found that solubility at the Krafft point is nearly equal to critical micelle concentration (CMC). Below the ...
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