INTERFACIAL RHEOLOGY INVESTIGATION OF POLYACRYLAMIDE-SURFACTANT INTERACTIONS

Oil/water interfacial viscosities are reported for aqueous mixtures of polyacrylamide (PAAM) and three different surfactants, i.e. sodium do decyl sulfate, cetyltrimethylammonium bromide and a commercial non-ion ic surfactant, TritonX-100. The results showed that interfacial viscos ity was dependent on shear rate, the interfacial viscosity decreased a s the ionic surfactant concentration increased, but the interfacial vi scosity was independent of non-ionic surfactant concentration and it w as relatively higher. Based on these experimental results, a mechanism for PAAM-surfactant interactions was proposed. (C) 1998 Elsevier Scie nce B.V.