Monte Carlo Simulation of Mixed Surfactants

We use a lattice Monte Carlo simulation method to investigate the effect of interaction energy between headgroups in behavior of binary surfactant mixtures. For different surfactant mixtures, we vary interaction energy between head groups to mimic nonideal mixing and to carry out a detailed study of how this affects the critical micelle concentration (CMC), the cluster distribution, and the interaction parameter. In addition, the simulation results for the mixed surfactant solution are compared with the predictions of the regular solution theory.