Gregg, S.J. and K. S. W. Sing, ?Adsorption, Surface Area and Porosity? 2nd editi

Publisher: Academic Press | Number Of Pages: 303 | Publication Date: 1982-05 | ISBN / ASIN: 0123009561 | DjVu | 3,2 MB

A section on capillary theory,

Surface tension between water and air is caused by the attraction forces acting on the molecules of the liquid. A contact angle is the angle between the edge of the meniscus and the sold material, hydrophilic for hydrophobic.

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