Spreading of Liquid Droplets on Cylindrical Surfaces: Accurate Determination of Contact Angle

Autor: H. Daniel Wagner, H. E. Gallis, Erica Wiesel
Rok vydání: 1989
Předmět:
Zdroj: MRS Proceedings. 170
ISSN: 1946-4274
0272-9172
DOI: 10.1557/proc-170-141
Popis: The wetting of cylindrical monofilaments by liquid polymers is a problem of much scientific and technological importance. In particular, the characterization of the physicochemical nature of interfaces is a key problem in the field of advanced fibrous composites. The macroscopic regime contact angle, which reflects the energetics of wetting at the solid-liquid interface, is difficult to measure by usual methods in the case of very thin cylindrical fibers.In the present article a numerical method is proposed for the calculation of macroscopic regime contact angles from the shape of a liquid droplet spread onto a cylindrical monofilament. This method, which builds on earlier theoretical treatments by Yamaki and Katayama [1], and Carroll [2], very much improve the accuracy of the contact angle obtained. Experimental results with high-strength carbon, para-aramid, and glass fibers, are presented to demonstrate the high degree of accuracy of the method proposed.
Databáze: OpenAIRE
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