Determination of Physicochemical Parameters of Sodium Dodecyl Sulfate in Aqueous Micellar Solutions Containing Short-Chain Alcohols

Abstract

Herein, the concentration effect of ethanol (in the molality range 0−9.5 mol•kg −1 ), 1-propanol (in the molality range 0− 7 mol•kg −1 ), and 2-propanol (in the molality range 0−13 mol•kg −1 ) on the micellization of sodium dodecyl sulfate (SDS) in aqueous solutions has been studied at 298 K. The aggregation properties of SDS in aqueous solutions were investigated earlier in the presence of these alcohols but in the alcohol concentration range used in this work the micellization parameters (i.e., the critical micellar concentration, CMC, the dissociation degree of micelles), and especially, the molar conductance of micelles and monomers, the alcohol partition between micelles and the intermicellar solution have not been reported in such detail as here. Moreover, the published CMC values are often considerably different. For the systems studied here, the Gibbs energy of alcohol solubilization in the micelles, foaming properties, and refractive indices were determined. The studies presented here provide information about stability of surfactant micelles in the presence of short-chain alcohols, and the results obtained may be useful for the surfactant applications in different fields especially when water-poor media are required.

Chemometric study of kosmotropic and chaotropic ion properties related to Hofmeister effects

“…), and sodium dodecyl sulfate (SDS) (Merck, purity > 99%) were used without further purification. SDS was applied in our study because it is a very popular ionic surfactant commonly used in various investigations . All solutions (10 −4 mol L −1 SDS in the presence of 10 −4 mol L −1 electrolyte) were prepared with deionized water, whose conductivity was 0.05 μS cm −1 .…”

“…The counterions studied were the univalent cations: the alkali metal ions (M = Li + , Na + , K + , Rb + , and Cs + ) and the ions M = H + , Cu + , Ag + , Tl + , and NH 4 + . 17 . All solutions (10 −4 mol L −1 SDS in the presence of 10 −4 mol L −1 electrolyte) were prepared with deionized water, whose conductivity was 0.05 μS cm −1 .…”

Studies on Synthesis, Characterization, Micellar Features, and Solubilization of Four Novel Cationic Gemini Surfactants

“…Surfactants are significant for the scientific world and have many application areas in industry and laboratories. Agrochemical, pesticides, textile, cosmetics, herbicides, biotechnology, detergents, pharmaceuticals, medicals, mineral flotation, food processing, nanotechnology, paint, petroleum, drug delivery, improved oil recovery, and agriculture are some surfactant applications commonly used in industry. − …”

β-Cyclodextrin-Functionalized Cellulose Nanocrystals and Their Interactions with Surfactants

“…1−3 These micellar structures are governed by the balance between the hydrophobic and headgroup interactions in aqueous solvents. 1 The micellar and thermodynamic properties of surfactants are mainly dependent on pH, pressure, temperature, concentration, and added electrolytes, cosurfactants, and cosolvents. 1 The specific properties, function, and application of surfactants depend on the cmc values and other parameters (the dissociation degree, aggregation number) of micellar aggregates.…”

“…Surface-active agents, also known as surfactants, are amphiphilic compounds consisting of hydrophobic and hydrophilic segments that self-assemble in water to form aggregates (micelles) beyond the critical micelle concentration (cmc). Beyond the cmc, the morphological transitions of micelles produce different morphologies, such as spheres, cylinders, vesicles, bilayers, and hexagonal phases. − These micellar structures are governed by the balance between the hydrophobic and headgroup interactions in aqueous solvents . The micellar and thermodynamic properties of surfactants are mainly dependent on pH, pressure, temperature, concentration, and added electrolytes, cosurfactants, and cosolvents .…”