界面张力的温度系数  

The Temperature Coefficient of Interfacial Tension

作　　者：戴乐蓉[1] 董向群[1] 

机构地区：[1]北京大学物理化学研究所,北京100871

出　　处：《物理化学学报》1999年第1期64-68,共5页Acta Physico-Chimica Sinica

摘　　要：The variation of iinterfacial 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.The variation of iinterfacial 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.

关 键 词：界面张力 温度系数 石蜡-水界面 分散体系 

分 类 号：O647.1[理学—物理化学]