Surface energy of the material is defined as sum of the two main
components that are based on the molecular interactions. Hitherto,
these were based on polar (cp) and nonpolar/disperse (cd) interaction
energy components. More lately, these are referred as Liftshitz–
van der Waals (cLW) and Lewis acid–base (cAB) interactions
refined by Good, Van Oss and Chaudhary (GVOC). cAB is further refined
into the acid (c) and base ðcÞ components and calculated
from their geometric mean as [11–13].