Surfactant interactions with P(AM–AA–BPAM) hydrophobically modified polyelectrolytes

Abstract

ABSTRACT:The interactions of hydrophobically modified polyelectrolytes poly(acrylamide-sodium acrylic acid-N-(4-butyl)phenylacrylamide [P(AM-AA-BPAM)] with anionic (sodium dodecyl sulfate), cationic (cetyl trimethylammonium bromide), and nonionic (tetradecyldimethylaminoxid) surfactants were studied via solution rheology, surface tension, and atomic force microscopy measurements. Viscosity measurements indicated that the intermolecular association of the polymer was greatly enhanced by the interaction with the surfactants, especially the oppositely charged surfactants with both a hydrophobic association and an electrostatic attraction. The greatest viscosity increase was realized with the addition of such oppositely charged surfactants.

Steady and dynamic rheological behaviors of sodium carboxymethyl cellulose entangled semi-dilute solution with opposite charged surfactant dodecyl-trimethylammonium bromide

“…However, when polyelectrolytes and surfactants are used together, they would interact with each other and lead to some unforeseen effects. For example, addition of polymer to surfactant aqueous solution may remarkably decrease critical micelle concentration (CMC) of the surfactant [2][3][4][5] and change the rheological properties to different extents [6][7][8]. On the other hand, the polymer-surfactant complex may form a precipitate making no performance [9][10][11][12][13][14][15].…”