物理化学学报 >> 1992, Vol. 8 >> Issue (03): 413-417.doi: 10.3866/PKU.WHXB19920325

研究简报 上一篇    下一篇

小角躺滴法测定低界面张力

张禹负; 朱王步瑶; 赵国玺   

  1. 北京大学物理化学研究所,北京 100871
  • 收稿日期:1990-10-30 修回日期:1991-05-24 发布日期:1992-06-15
  • 通讯作者: 张禹负

Small Angle Sessile Drop Method for Low Interfacial Tension Measurement

Zhang Yu-Fu; Zhu Bu-Yao; Zhao Guo-Xi   

  1. Institute of Phusics Chemistry, Peking University, Beijing 100871
  • Received:1990-10-30 Revised:1991-05-24 Published:1992-06-15
  • Contact: Zhang Yu-Fu

关键词: 低界面张力, 躺滴法

Abstract: Interfacial tension is important in various industry processes, particularly in petroleum recovery where low or ultralow interfacial tension between oil and water bring about great benefit. For the measurement of interfacial tension, serveral kinds of method can be used. Those depending on size and shape of liquid drop including se-ssile drop, pendant drop and sprinning drop methods are suitable. Among them, se-ssile drop method has the advantage of simple equipment and procedure. Usually, the radius of drop equator is necessary for sessile drop method. Hence a drop with contice. In systems of low or ultralow interfacial tension, it is seldom to form a contact angle larger than 90°. This had been a restriction for the application of sessile drop method. In this work, procedures for obtaining interfacial tension from size and shape with small contact angle (<90°) was provided. Good precision of this method was shown by applying to typical system (butanol/water). Comparasons of it with other methods have been made.

Key words: Low interfacial tension, Sessile drop method