Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (01): 64-67.doi: 10.1016/S1872-1508(07)60006-0

• ARTICLE • Previous Articles     Next Articles

Reverse Micelle Formation of C12-EOx-C12•2Br in n-Heptane

ZHENG Ou;YAN Hua;LONG Yun-Xia;ZHAO Jian-Xi;GAO Shao-Kang   

  1. Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002, P. R. China
  • Received:2006-07-04 Revised:2006-08-30 Published:2007-01-08
  • Contact: ZHAO Jian-Xi E-mail:jxzhao.colloid@fzu.edu.cn

Abstract: With n-hexanol as cosurfactant, quaternary ammonium Gemini surfactants C12-EOx-C12•2Br (x=1, 2, 3)formed reverse micelles in n-heptane. The critical reverse micelle concentrations (cmch) were determined using the absorption spectrum method with iodine as the probe. All values were less than the corresponding critical micelle concentration (cmcaq) in aqueous solution, where C12-EOx-C12•2Br formed the normal micelles. The cmch increased with increasing x, which was similar to the variation of cmcaq with x. The saturated amount of water solubilizated by the reverse micelles was enhanced by either increasing x or by raising the temperature.

Key words: Quaternary ammonium Gemini surfactants, n-hexanol/n-heptane solution, Reverse micelle, Solubilizing water