Interfacial energy γ_1,2 of a liquid-liquid or solid-liquid system is of paramount importance in colloid and interface science and its applications. To assess the dependence of γ_1,2 on the surface energies γ₁ and γ₂ of two materials in contact, Girifalco and Good proposed their venerable equation involving the interfacial interaction parameter ϕ. Subsequently, values of ϕ have been experimentally determined for various material pairs. Here, we show that, the data of ϕ closely follow a unique relationship ϕ = (1 − γ_1,2/γ₁)^½ for all pairs where the other material is non-polar. Theoretically, this curve describes the smallest possible ϕ. However, we also show that substituting this relationship into the Girifalco-Good equation reduces it to Antonov’s rule γ_1,2 = γ₁−γ₂. Such a simplistic approach is inaccurate, and we conclude that the plotting of ϕ vs. γ_1,2 has contributed to overestimating the applicability of the Girifalco-Good Equation.

界面能γ _1,2-一个液-液或固-液系统的是在胶体和界面科学及其应用至关重要。为了评估γ的依赖性_1,2上的表面能γ ₁和γ ₂的两种材料在接触的，吉里法尔科和Good提出其涉及界面相互作用参数φ古老的方程。随后，已通过实验确定了各种材料对的values值。在这里，我们显示，φ的数据紧跟的唯一关系φ=（1 - γ _1,2 /γ ₁）^½对于其他材料非极性的所有线对。从理论上讲，该曲线表示可能的最小smallest。然而，我们还显示，代这种关系到吉里法尔科就绪方程它降低到安东诺夫的统治γ _1,2  =γ ₁ -γ ₂。这样一个简单的方法是不准确的，我们得出这样的结论φ绘图与γ _1,2有高估吉里法尔科就绪方程的适用性作出了贡献。