Surface Tension Prediction for Binary Solutions

An equation is proposed to calculate the surface tension of binary liquid solutions. According to this equation the surface tension of the solution is related to the surface tension of the pure components, the thickness of the surface region and the molecular area of the capillary-active component. The method is applicable to systems comprising components of widely different molecular sizes and the full mole fraction range. Excellent results for the surface tension of binary systems in aqueous and non-aqueous media have been obtained. (Surface tension, composition) data for 30 different types of systems with about 300 data points can be calculated by the equation with an average percent deviation of about 0.8%. Thus agreement between the predicted and experimental surface tension is found to be good for many of these systems considering the simplicity of the model.

Keywords:

Surface Tension , Binary Organic Solution , Binary aqueous solution