Interpretation Based on Interfacial Tension

Accordingly, incomplete wetting can occur even when SFE and ST are equal in fact, this is very likely. 

The IFT depends on the interactions between solid and liquid. In the hypothetical absence of any attractive interactions between liquid and solid, the Hquid tends to minimize its interface with the solid, i.e. it avoids wetting the soHd. Accordingly, the IFT between soHd and liquid is maximized in the absence of interactions and decreases with increasing interactions between solid and liquid. 

As mentioned in the background section we apply a most basic model in that the total ST and SFE consist of two main components, the polar and the dispersion ones  

Furthermore, as both contributions originate from physically different interaction processes, all theories applying this two-component model assume that the polar part of the solid SFE interacts solely with polar part of the liquid ST and dispersion part of the soUd SFE interacts solely with the dispersion part of the liquid ST. 

Work of Adhesion Contact Angle Inter dal Tension 

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