首页 | 本学科首页   官方微博 | 高级检索  
     


Hydration of the organized molecular assembly of ionic surfactants as studied by vapor pressure and x-ray diffraction
Authors:K. Fukada  Y. Matsuzaka  Y. Ito  T. Nakazato  K. Matsui  Y. Hosoi  M. Fujii  T. Kato  T. Shirakawa  T. Seimiya
Affiliation:(1) Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, Minamioosawa 1-1, Hachiohji, 192-03 Tokyo, Japan
Abstract:Equilibrium vapor pressure of water was measured for ionic surfactant-water binary systems as a function of water content over the temperature range 5–11°C. The measurement of x-ray powder diffraction has also been performed to characterize the microscopic structures of these two-component systems. Examined surfactants were the homologs of sodium alkyl sulfate and alkyltrimethylammonium bromide. It was found that dodecyl and decyl sulfate formed solid di-and trihydrate respectively, while octyl sulfate and the cationic surfactants formed lyotropic liquid crystal instead. The x-ray long spacing of the liquid crystals scarcely varied with water content.Enthalpy of vaporization was calculated for both solid hydrates and lyotropic liquid crystals.
Keywords:Surfactant-water binary system  solid hydrate  lyotropic liquid crystal  vapor pressure  x-ray diffraction
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号