Conversion Tables of Contact Angles to Surface Tensions

A. W. Neumann Department of Mechanical Engineering, University of Toronto, Toronto, Ontario, M5S 1A4, Canada; Department of Microbiology, State University of New York at Buffalo, Buffalo, NY, 14214

D. R. Absolom Department of Mechanical Engineering, University of Toronto, Toronto, Ontario, M5S 1A4, Canada; Department of Microbiology, State University of New York at Buffalo, Buffalo, NY, 14214

D. W. Francis Department of Mechanical Engineering, University of Toronto, Toronto, Ontario, M5S 1A4, Canada; Department of Microbiology, State University of New York at Buffalo, Buffalo, NY, 14214

C. J. Oss Van Department of Mechanical Engineering, University of Toronto, Toronto, Ontario, M5S 1A4, Canada; Department of Microbiology, State University of New York at Buffalo, Buffalo, NY, 14214

Abstract

From the contact angle Θ determined with one liquid (of known surface tension) only, it is possible to obtain the values of the surface tensions γ_SV and γ_SL, via the equation of state (1):

where the subscripts S and L stand for the solid S and the liquid L, whilst the subscript V stands for vapor. In conjunction with Young's equation (2):

relation [l] yields:

With the help of a computer program values for γ_sv (1) and for γ_Sl (3) can be derived for different values of the contact angle 8 obtained with a liquid of given γ_LV

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Conversion Tables of Contact Angles to Surface Tensions

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Conversion Tables of Contact Angles to Surface Tensions

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