Download or read book Theoretical Modeling of Micellization and Solubilization in Ionic Surfactant Systems written by Vibha Srinivasan and published by . This book was released on 2003 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) The micellization theory was applied to surfactant solutions containing monovalent counterions (specifically, alkali metal ions), multivalent counterions (specifically, A13+ and Ca2+), and organic counterions having pendant hydrophobic groups that penetrate into the micelle core (specifically, the salicylate ion). For all the surfactant systems considered, the quantitative predictions made compared well with the relevant experimental results available in the literature. The second objective of this thesis was to study the effect of the surfactant tail (chain) molecular structure on the surfactant micellar solution properties, for surfactants having more complex tail structures than linear alkyl tails, including: (i) branched akyl tails, (ii) alkylbenzene tails, and (iii) fluorocarbon tails. For surfactants with branched alkyl tails and alkylbenzene tails, a single-chain mean-field theory of chain packing was combined with suitable Rotational Isomeric State (RIS) models describing the chain torsional conformations, and the chain conformational characteristics as well as the packing free energy were predicted. Although the micellar solution properties of these surfactants were not investigated, the predicted packing characteristics can be viewed as a valuable "first-step" in the development of a comprehensive, predictive, molecularly-based micellization theory for these surfactants. In the case of fluorocarbon surfactants, in addition to modeling chain packing within the micelle core using suitable RIS models for the fluorocarbon chains, the remaining free-energy changes associated with micelle formation were modeled as well ...