物理化学学报 >> 2003, Vol. 19 >> Issue (04): 364-367.doi: 10.3866/PKU.WHXB20030418

研究简报 上一篇    下一篇

SDS/n-C5H11OH/H2O溶致液晶中SDS分子的扩散特性

徐建新;刘天晴;郭荣   

  1. 扬州大学化学化工学院, 扬州 225002
  • 收稿日期:2002-08-05 修回日期:2002-10-14 发布日期:2003-04-15
  • 通讯作者: 郭荣 E-mail:guorong@yzu.edu.cn

Determination of the Diffusion Coefficients of SDS Molecules in SDS/n-C5H11OH/H2O Lyotropic Liquid Crystal

Xu Jian-Xin;Liu Tian-Qing;Guo Rong   

  1. School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002
  • Received:2002-08-05 Revised:2002-10-14 Published:2003-04-15
  • Contact: Guo Rong E-mail:guorong@yzu.edu.cn

摘要: 以铂微电极法测定了在SDS/n-C5H11OH/H2O溶致液晶中SDS(十二烷基硫酸钠)分子的扩散系数.结果表明,恒定质量比SDS/n-C5H11OH条件下,溶致液晶中SDS分子的扩散系数随体系中水含量的增加而增加;恒定质量比SDS/H2O,溶致液晶中SDS分子的扩散系数随正戊醇含量的增加而增加;恒定质量比H2O/n-C5H11OH ,溶致液晶中SDS分子的扩散系数随SDS含量的增加而降低.六角状液晶中SDS分子的扩散系数比层状液晶中SDS分子的扩散系数低约1个数量级,而比W/O、O/W胶束的扩散系数低3~5个数量级.

关键词: 十二烷基硫酸钠(SDS), 微电极, 胶束, 溶致液晶, 扩散系数

Abstract: The diffusion coefficients of the SDS(Sodium dodecyl sulfate) molecules in lyotropic liquid crystal of SDS/n-C5H11OH/H2O system have been determined by the method of platinum microelectrode voltammetry.The results show that the diffusion coefficients of SDS molecules in lyotropic liquid crystal increase with water content at constant mass ratio of SDS/n-C5H11OH and also with n-pentanol content at constant mass ratio of SDS/H2O, but decrease with SDS content at constant mass ratio of H2O/n-C5H11OH.The diffusion coefficient of the SDS molecule in hexagonal liquid crystal is nearly one order of magnitude less than that of the SDS molecule in lamellar liquid crystal, but is about three to five orders less than that of the W/O and the O/W droplets.

Key words: SDS, Microelectrode, Micelle, Lyotropic liquid crystal, Diffusion coefficient