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Citation: Dai Le-Rong, Dong Xiang-Qun. The Temperature Coefficient of Interfacial Tension[J]. Acta Physico-Chimica Sinica, ;1999, 15(01): 64-68. doi: 10.3866/PKU.WHXB19990112 shu

The Temperature Coefficient of Interfacial Tension

1.
Institute of Physical Chemistry,Peking University,Beijing 100871

Received Date: 11 February 1998
Available Online: 15 January 1999

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.
- Interfacial tension,
- Temperature coefficient,
- Interface of paraffin-water
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