Interaction of Novel Anionic Gemini Surfactants with Dodecyl Sodium Sulfate in Aqueous NaCl Medium and the Performance of Their Mixtures

The interaction in two mixtures of two novel anionic gemini surfactants, sodium 2,2'-(6,6'-(ethane-1,2-diylbis(azanediyl)bis(4-(hexylamino)-1,3,5-triazine-6,2-diyl) bis(azanediyl)diethanesulfonate (C-6-2-C-6) and sodium 2,2'-(6,6'-(ethane-1,2-diylbis(azanediyl)bis(4-(octylamino)-1,3, 5-triazine-6,2-diyl) bis(azanediyl) diethanesulfonate (C-8-2-C-8), and conventional anionic surfactants, sodium dodecyl sulfate (SDS), have been investigated in 0.1 M NaCl aqueous solutions. The mixed systems are C-6-2-C-6/SDS and C-8-2-C-8/SDS, and the mole factions (alpha(G)) of geminis are 0.1, 0.3, 0.5, 0.7, and 0.9, respectively. Mixtures of both C-6-2-C-6/SDS and C-8-2-C-8/SDS exhibit synergism in surface tension reduction efficiency and mixed micelle formation. But, all mixtures except C-6-2-C-6/SDS (alpha(G) = 0.7), C-6-2-C-6/SDS (alpha(G) = 0.9), and C-8-2-C-8/SDS (alpha(G) = 0.1) don't exhibit synergism in surface tension reduction effectiveness. The performances, such as wetting, emulsification, and dispersion were measured and the results showed all mixtures posses application properties.