Interactions between poly(acrylamide) and surfactants of different headgroup charge

✍ Scribed by J.Y. Zhang; L.P. Zhang; J.A. Tang; L. Jiang

• Book ID: 103967143
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 303 KB
• Volume: 88
• Category: Article
• ISSN: 0927-7757
• DOI: 10.1016/0927-7757(94)80083-9

✦ Synopsis

Air/water surface tensions and oil/water interfacial tensions are reported for aqueous mixtures of poly(acrylamide) (PAAm) and three different surfactants, i .e . sodium dodecyl sulfate (SDS), cetyltrimethylammonium bromide (CTAB), and a commercial non-ionic surfactant, Triton X-100 (TX-100) . Results show a synergistic effect between these surfactants and the polymer . Oil-in-water emulsification experiments using PAAm-surfactant mixtures showed that the TX-100-PAAm mixture was the most effective emulsifier . The emulsification ability of TX-100-PAAm was not affected by pH in the range pH 3-10, implying that hydrophobic interactions between TX-100 and PAAm dominate over other mechanisms. At low pH, SDS has an emulsification ability similar to TX-100, and at high pH the effect of CTAB is comparable to that of TX-100 . Pressure-area (n-A) curves and Brewster angle microscopy are used to gain insight into the interaction mechanism between PAAm and these three surfactants .