Surface activity of branched alkylamino-compounds and their influence on phase transfer behavior in water solutions of dyes

Abstract

Two branched alkylamino-compounds (AAC, R₁₂-0.5G, and R₁₂-1.0G), were synthesized from dodecylamine, methyl acrylate and ethylenediamine. The surface tension measurements on branched alkylamino- compounds demonstrated that surface activity of R₁₂-1.0G is superior to that of R₁₂-0.5G at 25°C. It has been found that the self-assembly of R₁₂-1.0G and lauric acid formed by electrostatic interaction and the self-assembly of the molecule might transfer water-soluble dyes from water to toluene. These AAC might be applied for treating dyes in wastewater. The mass ratio of lauric to toluene, the concentration of R₁₂-1.0G, and hydrophilic groups of dyes affected the transfer rate of the water-soluble dyes. The transfer rates of the watersoluble dyes by R₁₂-1.0G were higher than that of 1.0G polyacrylamide-acrylamide.