Complex formation between polyelectrolytes and ionic surfactants

Thesis book INTERACTIONS BETWEEN CATIONIC POLYELECTROLYTES AND ANIONIC SURFACTANTS

The impact of nonionic surfactant additives on the nonequilibrium association between oppositely charged polyelectrolytes and ionic surfactants.

The effect of uncharged surfactant additives on the oppositely charged polyion/ionic surfactant complexation is usually described as a direct equilibrium association between the polyelectrolyte molecules and free mixed micelles analogous to the polyion/colloidal particle interactions. This approach predicts that the binding of the ionic surfactant to the polyelectrolyte molecules can be complet...

Self-assembly of ionic surfactants and formation of mesostructures

Self-assembly of ionic surfactants resulting in micelle formation is studied using off-lattice Monte Carlo simulation in two dimensions (2D). We find that in addition to the Lennard-Jones (LJ) interaction, which acts among all of the particles, a screened Coulomb interaction, acting only among the surfactant heads, makes the geometric arrangement of micelles very different compared to that for ...

Charge screening between anionic and cationic surfactants in ionic liquids.

The aggregation and interfacial behavior of mixtures of anionic (sodium dodecylsulfate, SDS) and cationic (dodecylammonium bromide, DTAB) surfactants were investigated. A room-temperature ionic liquid (IL) was explored as a solvent for the SDS/DTAB system and compared to water. The critical micelle concentration (cmc) and composition in mixed micelles were determined for both solvents. Our expe...

Complex Formation between Bovine Serum Albumin and Strong Polyelectrolytes: Effect of Polymer Charge Density

Light scattering and pH titration were used to examine the binding of bovine serum albumin (BSA) to poly(diallyldimethylammonium chloride) (PDADMAC), poly(acrylamidomethylpropyl sulfonate) (PAMPS), poly(methacrylamidopropyltrimethylammonium chloride) (PMAPTAC), and an AMPS-acrylamide random copolymer (PAMPS80AAm20). The critical protein charge required to induce protein-polyelectrolyte complexa...