Journal of the American Oil Chemists Society · 1980 · 10 citations · 9 references
Natural SciencesChemistryBiomaterialsPhysical ChemistrySurface ScienceSurface HydrophilicitySurface ReactivitySurfactantsAmphoteric SurfactantsAnionic SurfactantsDetergencyMolar Extinction CoefficientSolubilizationSurface Active MoleculesSurface PropertiesSurfactant Systems
Abstract The performance of new amphoteric surfactants, N‐(2‐hydroxyethyl)‐N‐(2‐hydroxyalkyl)‐β‐alanines (HAA), and their oxyethylated derivatives (HAA‐nEO) was studied in blends with conventional anionic surfactants. Viscosity, ultraviolet (UV) spectroscopy, surface tension, foaming power, dye solubilization and detergency were measured for the blends of various compositions. The interaction between HAA and sodium linear alkylbenzene sulfonate (LAS) was discussed with respect to the deviation of molar extinction coefficient in the UV spectra. A complex formation was assumed. A notable change in viscosity of 1.0% aqueous solutions was observed at pH 8.0 for the compositions of HAA/LAS (3:1) and HAA/sodium lauryl sulfate (4:1). The binary systems exhibited excellent detergency and other surface active properties, and indicated synergistic effects at a certain weight ratio. Human and rabbit skin irritation also was evaluated.
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