Physico-Chemical Analysis in Some Ionic Surfactants by Time Domain Reflectometry (TDR)

摘要

In this present work, the properties of aqueous surfactant solutions with external additives are extensively useful in the surfactant-based systems. To study the dielectric relaxation studies of benzonitrle, acetonitrile with some acetomide, formamide in aqueous medium have been carriedout for different concentrations at 303 k. In order to understand the dynamics of ions mainly in micellar systems. The time domain dielectric data were obtained through HP54750A oscilloscope and TDR plug-in-module. The relaxation times were determined through the well-known Cole–Colemethod. The superposition of two relaxation times gives the dielectric relaxation time obtained from the hydrated water molecule with rotations around the micelle, ions and another hydrophobic inner side of the micelle. Viscosity measurements were carried out to correlate the dielectric data.Further, the Kirkwood correlation factor ( g _(f)), effective Kirkwood correlation factor ( g _(eff)), Bruggeman Factor ( f _(B)), excess inverse relaxation time (1/ τ )~(E), excess dielectric constant ( ε ~(E)) andfree energy of activation (Δ F _( τ )) were also calculated. The effect of dielectric relaxation and viscous flow are interpreted in detail.