Acta Chimica Sinica ›› 2002, Vol. 60 ›› Issue (6): 1001-1005. Previous Articles     Next Articles

Original Articles

低碳醇对季铵盐二聚表面活性剂C_(12)-2-C_(12)·2Br胶团化行为的影响

朱永平;赵剑曦;游毅   

  1. 福州大学化学系,福州(350002)
  • 发布日期:2002-06-15

Effects of Alcohol on the Micellization of Quaternary-ammonium Dimeric Surfactant C_(12)-2-C_(12)·2Br in Aqueous Solution

Zhu Yongping;Zhao Jianxi;You Yi   

  1. Department of Chemistry, Fuzhou University,Fuzhou(350002)
  • Published:2002-06-15

The effects of n-propanol, n-butanol, n-pentanol and n-hexanol on the micellization of quaternary-ammonium dimeric surfactant C_(12)-2- C_(12)·2Br have been investigated using conductivity and steady fluorescence measurements. The results show that the surfactant and the alcohols form mixed micelles with addition of alcohols. In the mixed micelles, the alkyl chains of the alcohol molecules penetrate into the micelle interior and the hydroxyl groups lie in the palisade layer of the micelles, which weaken the electrostatic repulsion between the ionic head groups of the surfactants and result in a decrease of cmc and an increase of the ionization degree of the micelle. The effects become more striking with increasing the alkyl chain length of the alcohol molecules.

Key words: QUATERNARY AMMONIUM COMPOUNDS, SURFACTANTS, COLLOID, ALCOHOL

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