Wetting & Contact Angle
Young's equation, spreading coefficient, wetting regimes
Young's equation: γ
SV
= γ
SL
+ γ
LV
·cos θ
Spreading coefficient: S = γ
SV
− γ
SL
− γ
LV
| S ≥ 0: complete wetting; S < 0: partial wetting
γ
SV
(solid-vapor surface energy, mN/m) =
50
γ
SL
(solid-liquid interface energy, mN/m) =
20
γ
LV
(liquid-vapor surface tension, mN/m) =
72
—°
Contact angle θ
—
Spreading coeff S
—
Work of adhesion W
a
—