The surface energy analysis method used the contact angle method as a method of analyzing the wettability of the sample surface. The measurement of the contact angle is used not only as an interface but also as an analytical technique which is very useful in adhesion, coating, polymer filed, thin film technology, and surface treatment.
The contact angle refers to the angle of the interface formed when a substance that does not mix with the fluid toucher. The contact angle between the liquid and the solid, especially in the gas or vacuum state, forms the thermodynamic equilibrium of the surface between the gas, liquid and solid.
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