Abstract
Surface tension as a function of concentration and temperature was measured for solutions of N-acyl sarcosinates, RCON(CH3)CH2COONa. From the intersection points in the (γ-log c) curves, the critical micelle concentration (CMC) was determined at 20, 35, 50, and 65°C. Structural effects on the CMC, maximum surface excess, and the minimum area per molecule at the aqueous solution/air interface are discussed. The free energy, enthalpy, and entropy of micellization and adsorption of surfactant solutions also were investigated.
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Gad, E.A.M., El-Sukkary, M.M.A. & Ismail, D.A. Surface and thermodynamic parameters of sodium N-acyl sarcosinate surfactant solutions. J Amer Oil Chem Soc 74, 43–47 (1997). https://doi.org/10.1007/s11746-997-0117-x
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DOI: https://doi.org/10.1007/s11746-997-0117-x