Acta Chimica Sinica ›› 2001, Vol. 59 ›› Issue (5): 707-712. Previous Articles     Next Articles

Original Articles

CTAB反相微乳液中水辛烷分子的自扩散研究

徐键;李干佐;周国伟;陈文君;姚发业   

  1. 山东大学胶体与界面化学教育部国家重点实验室
  • 出版日期:2001-05-15 发布日期:2001-05-15

Self -diffusion study of solvent molecules in CTAB inverse microemulsion

Xu Jian;Li Ganzuo;Zhou Guowei;Chen Wenjun;Yao Faye   

  • Online:2001-05-15 Published:2001-05-15

Quaternary inverse microemulsion of a cationic surfactant (cetyltrimethylammonium bromide, CTAB), octane, waterm and 1- butanol has been investigated by using conductivity, pulsed foeld fradient spinechol NMR measurements. The conductivity behavior of such microemulstions has a distinct percolative phenomenon. In the W/O microemulsion region, the self -diffusion coefficient of water is relatively high(2~7×10^-10m·s^-1) due to higher solubility of water in the continuous phase, which is composed of octane (ω= 10%) and 1-butanol (an apolar solvent and a weak polar solvent ), and "sticky" collisions between the droplets tn the percolation rane. Pentration of a large amount of octane molecules between surfactants chanis singnificantly lowers (1~3×10^-10m^2·s^-1) the self- diffusion coefficient of octane .

Key words: NORMAL OCTANE, WATER, MICROEMUSION, N-BUTANOL, NMR SPECTROMETRY, ELECTRIC CONDUCTANCE

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