高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (4): 525.

• 论文 • 上一篇    下一篇

液滴在不互溶液体表面上的相对界面自由能曲面及Neumann三角形的导出

王正烈   

  1. 天津大学化学系, 天津, 300072
  • 收稿日期:1991-06-10 出版日期:1992-04-24 发布日期:1992-04-24

The Relative Interfacial Free Energy Curved-Surface of a Liquid Drop Floating on an Immiscible Liquid Surface and the Derivation of Neumann's Triangle

WANG Zheng-lie   

  1. Department of Chemistry, Tianjin University, Tianjin, 300072
  • Received:1991-06-10 Online:1992-04-24 Published:1992-04-24

摘要: 根据系统的界面Helmholtz自由能自发地趋于最低的热力学原理,以浮在不互溶液体(2)表面上透镜状液滴(3)在气(1)、液2、液3三相交界处,气-液3、液2-液3界面各自和气-液2界面通过液滴内部的夹角θ1、θ2为变量(0°≤θ1≤180°,0°≤θ2≤180°),证明出3个界面张力γ12、γ13、γ23各种可能组合情况下液体3稳定时的θ1、θ2值与它们之间的关系,导出Neumann三角形;并按照计算数据绘出几种类型相对于气相中圆球形液滴的界面自由能曲面图。

关键词: 界面自由能曲面, 接触角, Neumann三角形

Abstract: According to the fundamental principles of thermodynamics, the stable form of a liquid floating on another immiscible liquid has been discussed for all the combinations of the three interfacial tensions, and the relationship between the interfacial tensions and the contact angles of liquid drop-Neumann' s triangle has been derived.The relative Helmholtz free energy curved-surfaces of the system have been plotted for certain types on the basis of the calculated values.

Key words: Interfacial free energy curved-surface, Contact angle, Neumann's triangle

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