乙醇胺-二乙醇胺-水溶液表面张力研究

Study on the surface tensions of MEA-DEA aqueous solutions

用全自动表面张力仪测定了296～353 K温度范围内,乙醇胺(Monoethanolamine,MEA)-二乙醇胺(Diethanolamine,DEA)水溶液的表面张力,并提出了可准确关联和预测MEA水溶液、DEA水溶液及MEA-DEA水溶液表面张力的计算模型。结合实验测定和理论预测,分析了醇胺水溶液的表面张力、表面熵和表面焓等热力学性质与醇胺浓度及温度之间的关系。

The surface tensions of monoethanolamine （MEA） -diethanolamine （DEA） aqueous solutions were measured by using an automatic tension-meter under temperatures ranging from 296 to 353K. A theoretical model that can accurately correlate and predict the surface tensions of MEA-water, DEA-water and MEA-DEA-water mixtures was proposed. The temperature and amine concentration dependence of surface tension, surface enthalpy and surface entropy were analyzed on the basis of experiments and calculations.