A novel semi-empirical method for adjusting solubility parameters to surface tension based on the use of Stefan's rule

The correct calculi of surface tension and solubility parameters are of paramount importance for many fields of chemical engineering and materials design, such as encapsulation methods, dispersion of nanopowders, phase compatibility in chemical blends and nanocomposites, among others. The solubility parameters play a key role in these applications along with the surface tension. Until now, the relationship between solubility parameters and surface tension was only indirect, through the Skaarup-Beerbower formula, although well known physicochemical rules, such as Stefan's rule, could be applied to them directly, as shown in this study. A new method for adjusting the Hildebrand solubility parameters for surface tension through the use of the ratio of the coordination numbers, molar volume and surface tension is presented. The proposed rules are precise, simple and have direct practical applications for the development of new materials. (C) 2018 Elsevier B.V. All rights reserved.