Polyelectrolyte-induced structural changes in the isotropic phase of the sulfobetaine/ pentanol/toluene/water system

摘要: The paper describes the behavior of sulfobetaine/pentanol/toluene/water system. An isotropic inverse micellar region (L2 phase) can be observed in oil corner. area L2 phase is decreased by adding an anionic polyelectrolyte, i.e. sodium polyacrylate. incorporation cationic polyelectrolyte poly(diallyl-dimethylammonium chloride) (PDADMAC) induces extension direction water corner under formation channel. aim work presented here was to study this channel at constant surfactant concentration (i.e. 20%) means electrical conductivity, 1H NMR self-diffusion experiments, rheology, polarizing microscopy, small-angle X-ray spectroscopy, and micro-differential scanning calorimetry (DSC). Macroscopically, no indication a transition when going from oil-rich side water-rich side. However, above critical content aqueous PDADMAC solution, diffusion coefficients are changed significantly, freezable becomes detectable DSC measurements, lamellar liquid-crystalline textures become visible after shearing. This explained shear-induced phase, combined only small viscometric conductometric effects. Lα significant change curvature film due Coulombic interactions with polycation.