Surfactant bridge model

A surfactant bridge model which combines the electrostatic force and the surface tension force w as also proposed to explain the surfactant-activated ER effect phenomena 131, 321 ... 

Hill developed the thermodynamics of small systems and also applied it to the aggregation of solutes. This theory serves as a bridge between the mass-action and phase-separation models. Further development has been done by Hall. " Recently, Tanaka applied the theory to static light scattering data for aqueous solutions of nonionic surfactants, and proved its usefulness. This chapter introduces the fundamental concept of this thermodynamics as a basis for understanding micellar solutions. 

The SCLF model has several important features (1) adsorption of polyfimc-tional, multisegmented solute molecules, such as surfactants, can be modeled (2) the effects of flexibility of multisegmented solute and solvent molecules can be accoimted for (2) the volume fraction profiles of the solute molecular segments in the adsorbed layer (lattice layers near the solid surface) can be determined (3) effects of counter ions and multiple solute molecules can be modeled (4) electrostatic interactions are considered (5) lateral interactions can be modeled (6) since the model is based on the probability distribution of conformations of the entire solute molecule, the probability of conformations such as trains, loops, tails, and bridges can be determined speeifically and (7) the mean field approximation applied to solute distribution within eaeh lattic layer results in computation time being linearly proportional to the number of segments in each solute or solvent molecule. 

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