高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (4): 737.

• 研究论文 • 上一篇    下一篇

表面活性剂对分散体系粘度影响的特殊性

王海波, 刘德山, 李艳梅   

  1. 清华大学化工系, 材料科学研究院, 北京 100084
  • 收稿日期:2004-04-05 出版日期:2005-04-10 发布日期:2005-04-10
  • 通讯作者: 刘德山(1941年出生),男,教授,博士生导师,从事聚合物化学的研究.E-mail:hxh2dce@mai.ltsinghua.edu.cn E-mail:hxh2dce@mai.ltsinghua.edu.cn

Specific Effect of Surfactant on the Viscosity of Dispersion System

WANG Hai-Bo, LIU De-Shan, LI Yan-Mei   

  1. Department of Chemical Engineering, School of Material Science and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2004-04-05 Online:2005-04-10 Published:2005-04-10

摘要: 通过液体石蜡的水基化分散对影响分散体系粘度的粒子大小、表面活性剂胶束和界面膜等因素进行了研究.结果表明,表面活性剂胶束对分散体系粘度的影响极为有限,而在分散相粒子界面上由表面活性剂分子所形成的界面膜是导致分散体系粘度产生变化的重要因素.实验数据表明,对于分散体系的稳定性,存在一个表面活性剂浓度变化的临界值,而该临界值所对应的是表面活性剂分子在粒子表面以最紧密和规整的方式形成的界面膜,该种界面膜使分散体系粘度达到最大值,从而最大限度地保证了分散体系的稳定性.

关键词: 表面活性剂, 界面膜, 分散相粒子, 粘度, 胶束, 稳定性, 分散体系

Abstract: A novel way for analyzing the effect of surfactant on the viscosity of dispersion system was proposed. In the proposed method the effects of the films formed by surfactant molecules on the viscosity of dispersion system was taken into account. And it was suggested that the viscosity of the dispersion system was hardly affected by micelles in the system. It was the film formed by surfactant molecules that was the important factor to affect the viscosity of the dispersion system. The states of the film changed greatly with increasing the amount of surfactant added in the system. There was a maximum value for the viscosity of the dispersion system with the changing of the film states. The film formed by ordered surfactant molecules on the interface of oil and water was beneficial to the increasing of viscosity of the dispersion system. And this kind of film was very useful to the stability of the dispersion system.

Key words: Surfactant, Interface film, Particles in dispersion phase, Viscosity, Micelle, Stability, Dispersion system

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