Cationic hydroxyethyl cellulose polymers in aqueous solutions: Phase behavior in the presence of anionic surfactants
Dixit, Poornima C.
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Mixtures of polymers and surfactants are widely used in aqueous media to provide structure, solubilization domains, and/or colloidal stability. Underlying these functions are inter- and intra-molecular interactions that depend on the nature of the polymers and the type of surfactants. We have investigated here the phase behavior of cationic Hydroxyethyl cellulose in aqueous media upon addition of oppositely charged surfactants, sodium dodecyl sulfate (SDS) or Standapol ES2. The solution behavior and interactions between the polyelectrolyte and the surfactant can be profoundly affected by the polyelectrolyte charge density and hydrophobic modification, as well as by the presence in water or polar organic solvents (co-solvents). Key Words : phase behavior, polymer-surfactant complexes, polyelectrolyte, Hydroxyethyl Cellulose sodium dodecyl sulphate (SDS), Standapol ES 2.