Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (12): 2309-2313.doi: 10.3866/PKU.WHXB20081227

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Surface Properties of Gemini Surfactants in Ethanol-Water Mixtures

HU Shang-Lin, LU Ting, LAN Yu-Ru, HUANG Jian-Bin   

  1. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China; College of Chemistry and Material, Longyan University, Longyan 364000, Fujian Province, P. R. China
  • Received:2008-07-07 Revised:2008-09-19 Published:2008-12-04
  • Contact: HUANG Jian-Bin E-mail:jbhuang@pku.edu.cn

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Abstract: Surface properties of Gemini surfactants 12-s-12 (Et)(s=4, 6, 8, 10, 12) in ethanol/water solvents were studied by measurement of surface tension curves. Values of the critical micelle concentration (cmc), surface tension at the cmc (γcmc), saturation adsorption (Γmax) and minimumarea per surfactant molecule (Amin) for Gemini surfactants in various ethanol/water mixture ratios were determined. The effect of ethanol addition on the cmc and γcmc for this series of surfactant systems is discussed.

Key words: Gemini surfactants, Surface properties, Ethanol-water mixed solvent