Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (01): 22-27.doi: 10.3866/PKU.WHXB20060105

• ARTICLE • Previous Articles     Next Articles

The Effect of Organic Salts on the Conductance of the Water/AOT/Alkanol W/O Microemulsion

ZHANG Xiao-guang; DONG Jin-feng; ZHANG Gao-yong; ZHOU Xiao-hai; HONG Xinlin   

  1. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
  • Received:2005-05-13 Revised:2005-06-06 Published:2006-01-15
  • Contact: DONG Jin-feng E-mail:Jfdong@whu.edu.cn

Abstract: The conductivity behaviour of water-in-alkanol(hexanol, heptanol, octanol, decanol) microemulsions, in which AOT was employed as surfactant, was investigated. The percolation phenomenon induced by water was found only in the water/AOT/decanol system. The effects of organic salts (sodium cholate and sodium salicylate) and temperatureon conductance were then studied. In heptanol and octanol systems the conductivity was decreased with the increase of sodium cholate concentration, whereas it was increased in the case of sodium salicylate. In decanol system the conductivity was hardly changed in the presence of both organic salts. The values of lnσ had a linear correlation with temperature in the range of 5~40 ℃. No percolation threshold induced by temperature was detected either in the absence or in the presence of organic salts. The activation energy for conductance was estimated according to the Arrhenius-type equation.

Key words: Alkanol, Microemulsion, Conductivity, Percolation, Organic salts, AOT