高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (5): 717.

• 研究简报 • 上一篇    下一篇

W/O型微乳液活化能和导电机理研究

沈兴海, 王文清, 顾国兴   

  1. 北京大学技术物理系, 北京 100871
  • 收稿日期:1992-06-29 修回日期:1992-09-11 出版日期:1993-05-24 发布日期:1993-05-24
  • 通讯作者: 王文清

Studies on the Activation Energies and the Mechanism of Electric Conductivity of W/O Type Microemulsions

SHEN Xing-Hai, WANG Wen-Qing, GU Guo-Xing   

  1. Department of Technical Physics, Peking University, Beijing, 100871
  • Received:1992-06-29 Revised:1992-09-11 Online:1993-05-24 Published:1993-05-24

关键词: 微乳液, 活化能, 导电机理

Abstract: Variations of activation energies (△E) with water content for microemulsions composed of SDS-alcohol (1-butanol-l-octanol)-heptane-water were determined.It is found that ASbutanol system decreases slightly with the increase of water content, while that of pentanol system presents a maximum at its percolation threshold.For hexanol, heptanol and octanol systems, the activation energies exhibit rising trends before the limitations of added water.It is also found that the activation energy increases with the increase of the length of alcohol chain, which means that the longer the length of alcohol chain, the bigger the strength of the interfacial membranes of particles.Based on the above results, the mechanism of electric conductivity of W/Omicroemulsions is suggested, i.e., cations' hopping through the membranes of particles among the inner water cores results in producing the electric conductivity.

Key words: Microemulsion, Activation energy, Mechanism of electric conductivity

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