Micellization and intermicellar interactions in aqueous sodium dodecyl benzene sulfonate solutions

Abstract

Quasielastic light scattering was used to investigate the size and shape of sodium dodecyl benzene sulfonate (SDBS) micelles in aqueous solutions. Measurements were made as a function of temperature and NaC1 and SDBS concentrations. Light scattering data indicate that the micelles are spherocylinders with a semiminor axis of 22 A. The length of the micelles increases strongly with salt concentration and decreases with temperature. The minimum micelle has an aggregation number of n o = 28 and a hydrodynamic radius of R = 22 A. Diffusion coeificient and intensity data were analyzed using a thermodynamic theory of micellar aggregation and a model based on DLVO theory of interactions.

Elongational Flow of Solutions of Poly(ethylene oxide) and Sulfonated Surfactants

“…Other studies with an AOS containing almost equal amounts of C 14 , C 16 , and C 18 revealed a CMC of 4.2 mM (19). The composition of the AOS used by the different research groups appears to be the cause of the differences in the results.…”

“…Surface tension experiments yielded a value for the CMC of about 1.6 mM for an AOS with mostly fractions of C 16 and C 18 (29). Other studies with an AOS containing almost equal amounts of C 14 , C 16 , and C 18 revealed a CMC of 4.2 mM (19).…”

“…Several works (13)(14)(15) have shown that the CAC of the surfactant decreases with increasing chain length of the alkyl sulfate. Sulfonates have received considerable attention due to their importance in tertiary oil recovery (16) and in other applications such as laundry products, dishwasher liquids, and personal care products (17)(18)(19). Examples of commonly used sulfonates are sodium dodecyl benzene sulfonate (SDBS) and α-olefin sulfonates (AOS).…”

Formation of rodlike micelles of dimethyloleylamine oxide in aqueous solutions: effects of addition of HCl and NaCl on the micelle size and the intermicellar interaction

“…Recently, intermicellar interaction of surfactants in aqueous solutions has been investigated by many workers [29][30][31][32][33][34][35][36]. Dynamic light scattering of ionic micdles in aqueous solutions was measured and the results were analyzed on the basis of the DLVO theory [29,30].…”

The Potential of Perylene Bisimide Derivatives for the Solubilization of Carbon Nanotubes and Graphene

“…The most signifi cant aspect is the outstanding exfoliation capability of the bolaamphiphilic perylene derivative 1 and the amphiphilic perylene derivative 3 approaching 76% (at pH = 10). Please note that this is by a factor of fi ve higher than the commonly used detergent SDBS which forms micelles with a radius of 3 nm [ 101 ] that allows inclusion of small nanotube bundles. [ 102 ] Since nanotube individualization is the key factor for any separation scenario, improving the exfoliation will also ultimately have the potential to enhance sorting yields.…”