Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (08): 2200-2204.doi: 10.3866/PKU.WHXB20100643

• COLLOID AND INTERFACE CHEMISTRY • Previous Articles     Next Articles

Hydrophobic Synergism between the Alkyl Tails of Gemini Surfactants during Adsorption and Aggregation

YOU Yi, DENG Yong-Shu, LI Er-Jun, PEI Xiao-Mei, ZHAO Jian-Xi   

  1. Institute of Colloid and Interface Chemistry, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108, P. R. China
  • Received:2010-01-13 Revised:2010-03-23 Published:2010-07-23
  • Contact: ZHAO Jian-Xi E-mail:jxzhao.colloid@fzu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20673021, 20873024) and Professor Foundation of Fuzhou University, China (2008-XY-5).

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Abstract:

The critical micelle concentration (cmc) and the concentration reducing 20 mN·m-1 of water surface tension (pC20) by the Gemini surfactant series (m-6-m) and the corresponding monomers (CmTABr) were determined using surface tension measurements. Comparison between the active parameters indicates that the Gemini surfactants have a stronger micellization and adsorption ability than CmTABr, which is attributed to the hydrophobic synergism between the alkyl tails of the Gemini surfactants. The effects of dissymmetry in the Gemini surfactants (12-6-m) on the micellization and adsorption were also discussed. The results showed that the Gemini surfactant with a symmetric structure is more effective in association and adsorption than that with a dissymmetric structure.

Key words: Gemini surfactant, Hexamethylene spacer, Hydrophobic synergism between alkyl tails, Surface tension