Study of the Surface Tension of the Aqueous Solutions of Dodecylamidoethyldimethylbenzylammonium Chloride

The dynamic and equilibrium surface tensions of aqueous dodecylamidoethyldimethylbenzylammonium chloride solutions of various concentrations at 16, 20, 25, 30, and 35°C are studied for the first time. The effects of the concentration and temperature on the surface tension relaxation are discussed. The possibility of two-dimensional phase transition and its effect on the dynamic behavior of surface tension are considered.     

Physicochemical properties of low-dimension systems: Micellar solutions of surfactants and surfactant/polymer complexes

As shown in theoretical papers [1] and confirmed by experiments, the transport coefficients in micellar aqueous solutions exhibit a number of anomalies (minima and maxima in the concentration dependences). The studies revealed the existence of four critical micellization concentrations. At approximately 30°C, the critical micellization concentrations have a minimum. Measurements of the dynamic surface tension furnish information on surfactant/polymer complexation.     

Surface Tension in Aqueous Dodecylethylaminocarbonyldimethylbenzylammonium Chloride

The surface tension of aqueous solutions of the cationic surfactant dodecylethylaminocarbonyldimethylbenzylammonium chloride is measured for the first time over a wide concentration range from 7.9×10^{- 7} to 3.9×10^{- 2} M at 20-35°C. The critical micelle concentration of DAEDMBAC as influenced by temperature is determined.