物理化学学报 >> 1999, Vol. 15 >> Issue (01): 64-68.doi: 10.3866/PKU.WHXB19990112

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界面张力的温度系数

戴乐蓉, 董向群   

  1. 北京大学物理化学研究所,北京 100871
  • 收稿日期:1998-02-11 修回日期:1998-03-27 发布日期:1999-01-15
  • 通讯作者: 戴乐蓉

The Temperature Coefficient of Interfacial Tension

Dai Le-Rong, Dong Xiang-Qun   

  1. Institute of Physical Chemistry,Peking University,Beijing 100871
  • Received:1998-02-11 Revised:1998-03-27 Published:1999-01-15
  • Contact: Dai Le-Rong

关键词: 界面张力, 温度系数, 石蜡-水界面

Abstract:

The variation of interfacial tension with temperature of two different systems, water-oil (liquid paraffin, C18H38, solution of solid paraffin)and silicone oil-vegetable oil was determined and the factors that influence the variation of the shape of the relation curves were examined. It is found that the presence of minute amount of surface active impurity was the main cause of the shape variation of the relation curves. The shape variation was eliminated by adsorptive agent. Therefore, it is important to insure purity of the experimental system in order to obtain reliable results on the study of thermocapillary flow caused by interfacial tension.

Key words: Interfacial tension, Temperature coefficient, Interface of paraffin-water