Temperature-Independent Components of Non-polar and Polar Liquid Surface Tension

Multi-phase interfacial interaction among liquids and solids involving wetting, adhesion, and adsorption is the foundation in many industrial areas, including the separations, petroleum, and pharmaceutical industries. One of the most robust predictive frameworks of surface/interfacial tension or energy is the van Oss-Chaudhury-Good (vOCG) model, which leverages interfacial tension component theory and has been successfully applied in predicting interfacial interactions between non-polar/polar liquids and solids at room temperature. However, validation outside room temperature bounds remains unproven and limited research is available for the effect of temperature on the surface tension components. To make this theory more general and validate it outside room temperature, we characterize the temperature effect on the Lifshitz-van der Waals (LW, non-polar) and Lewis acid-base (AB, polar) components within the vOCG framework using the pendant droplet method and liquid-solid contact angle measurements at various temperatures and verify our measurements by predicting miscibility (liquid-liquid) properties and wetting (liquid-solid) behavior among other multi-phase combinations at different temperatures. This research reveals the effect of temperature on the LW and AB components of surface/interfacial tension and will guide the development of a predictive model capable of estimating interfacial interaction behavior for liquid-liquid, liquid-solid, and liquid-liquid-solid multi-phase systems.