Abstract
We have investigated the effects of an organic salt, namely p-toluidine hydrochloride (PTHC), on the phase behavior of aqueous solutions of an anionic surfactant, sodium dodecyl sulfate (SDS). Specially, the behavior of SDS-PTHC-water system at 40∘C has been studied using small angle X-ray scattering (SAXS) and polarizing optical microscopy (POM) techniques. As the concentration of PTHC increases, the system exhibits three phases, namely: hexagonal (H), a lamellar (Lα) phase with excessive water, denoted by (I+Lα), and an isotropic phase of bilayer (Lx) with excess water, symbolized by (I+Lx). Electron density maps has been reconstructed for the H and Lα phases. The Lα phase and the Lx phase are both found to be satisfactorily represented by the model of the Lα phase. It is apparent from the findings that a substantial quantity of organic salts can be utilized to screen out the ionic charges of the surfactant and stabilize the Lx phase.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call