Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (03): 269-273.doi: 10.3866/PKU.WHXB19990314

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Thermodynamical and Electrochemical Properties of CTAB/CnH2n+1OH/H2O

Guo Rong, Shen Ming, Liu Tian-Qing   

  1. Department of Chemistry,Teacher's College,Yangzhou University,Yangzhou 225002
  • Received:1998-03-16 Revised:1998-06-01 Published:1999-03-15
  • Contact: Guo Rong

Abstract:

Distribution coefficient K of C n H 2 n +1 OH between micellar phase and water phase in CTAB/C n OH/H 2O O/W system increases with the increase of alcohol chain length. The relationship between solubilization Gibbs free energyΔGmΘ(A) of alcohol in CTAB micellar system and alcohol chain length( n C.) is given by an equation,viz: ΔGmΘ(A)  = -6.82-1.175 n C. The measurement of cyclic voltammetry shows that the second cmc of CTAB reduces with the addition of alcohol and the increase of alcohol chain length, which is advantageous to the CTAB micelle sphere to rod transition.

Key words: Micelle, Microemulsion, Distribution coefficient, Solubilization Gibbs free energy, Second CMC