Present studies of micellization and sizes of micelles, foamability and foam stability of different nonionic surfactants provide a sound background for selection and application of surfactants for EOR.
The critical micelle concentration (CMC) and enthalpy of micellization (ΔHmic) were obtained from calorimetric curves.
Furthermore, the disappearance of the large aggregates with time, in favor of micelles, suggests that the micellization of the block copolymers is thermodynamically favored.
In the presence of ZnS nanoparticles, the process of micellization takes place prior to that of free micelles.
The thermodynamics of micellization were also studied.
The Gibbs free energies of micellization (ΔG°mic) and adsorption (ΔG°ads) were found to be negative, indicating that 14-E2-14 micellization ispontaneoususpontaneous
Differential scanning calorimetry was used to examine the effects of concentration on the thermodynamics of micellization.
A mechanism of micellization is proposed, consistent with the experimental data recorded and the hypotheses known from the consulted literature.
Thermodynamic data show that the presence of IPA may be not an advantage to the spontaneous process of micellization, and influences the contribution of entropy in the process of micellization.
The enthalpy of micellization is estimated directly with the help of microcalorimeter for the lower range of DMSO solution.
