Polymers for enhanced oil recovery: A paradigm for structure–property relationship in aqueous solution

Association and segregation in aqueous polymer/polymer, polymer/surfactant, and surfactant/surfactant mixtures: similarities and differences

Polymer—surfactant interaction part II. Polymer and surfactant of opposite charge

Fluorescence methods in the study of the interactions of surfactants with polymers

In this paper, the use of surfactants for solubilization of hydrophobic organic dyes (mainly solvent and disperse dyes) has been reviewed. The effect of parameters such as the chemical structures of the surfactant and the dye, addition of salt and of polyelectrolytes, pH, and temperature on dye solubilization has been discussed. Surfactant self-assemble into micelles in aqueous solution and below the concentration where this occurs-the critical micelle concentration (CMC)-there is no solubilization. Above the CMC, the amount of solubilized dye increases linearly with the increase in surfactant concentration. It is demonstrated that different surfactants work best for different dyes. In general, nonionic surfactants have higher solubilization power than anionic and cationic surfactants. It is likely that the reason for the good performance of nonionic surfactants is that they allow dyes to be accommodated not only in the inner, hydrocarbon part of the micelle but also in the headgroup shell. It is demonstrated that the location of a dye in a surfactant micelle can be assessed from the absorption spectrum of the dye-containing micellar solution.

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P.S. Leung

Papers

A study of polycation—anionic-surfactant systems

Studies of gel formation, phase behavior and surface tension in mixtures of a hydrophobically modified cationic cellulose polymer and surfactant

Fluorescence and solubilization studies of polymer—surfactant systems

Oil dispersion properties of silanated calcium carbonate: A rheological study