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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Takai, M., Hidaka, H., Ishikawa, S. et al. New amphoteric surfactant containing a 2-hydroxyalkyl group: III. Performance of binary systems of amphoteric/anionic surfactants. J Am Oil Chem Soc 57, 382–387 (1980). https://doi.org/10.1007/BF02687665
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DOI: https://doi.org/10.1007/BF02687665