Two Liquids and a Solid

The previous equations, developed for a gas-liquid-solid interface, can also be used for the conditions existing at the interfaces between a solid and two immiscible liquids A and B. 

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Contact Angle of Solid at Interface of Two Liquids—One other situation of practical importance should be considered, namely the contact angle of two liquids and a solid. Let one of the liquids be designated by A and the other by J3, and the contact angle between them by dAB (Figure 62). Resolving our surface tensions, as above, we obtain, as in Eq (11-3), the adhesion tensions... 

Contact angles with two liquids and a solid. The mathematical treatment of the case of two liquids A and J5, and a solid St is similar to... 

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