접촉각 측정에 의한 표면의 특성연구( II ) -섬유나 막대의 직경이 접촉각에 미치는 영향-

Characterization of Surfaces by Contact Angle Goniometry - II . Effect of Curvature on Contact Angle -

The effect of diameter of rods or fibers on contact angle was studied in a vertical rod configuration. A contact angle measuring device described in the previous paper was optimized for the measurement of small-diameter fibers. It was shown that contact angles of water and hexadecane on nylon 6 monofilsments and glass rods increased with decrease of diameter below a critical diameter, which varied from one system to another. Beyond the critical value, contact angle of the liquid on the vertical glass rod reached to an equilibrium value which is equal to the unique value of the contact angle of the liquid drop on the horizontal glass plate.