A brief history of the Wilhelmy technique for surface tension and contact angle measurements introduces the equation and the methods necessary to correctly apply this modern and automatic procedure. Many simple practices may avoid systematic errors and allow reliable results to be obtained for both quantities. The paper analyses simple runs, i.e. the application to standard shapes as cylinders and parallallelepipeds, but also non-simple runs, i.e. to non- standard samples such as disk-shaped, to porous and flexible samples, to more viscous fluids, etc. Many experimental details such as the size ratio of specimens to the liquid container may be extremely important; their role and the history of discussion about those topics are reviewed and discussed herein.

The Wilhelmy method, a critical and practical review / Della Volpe, C.; Siboni, S.. - In: SURFACE INNOVATIONS. - ISSN 2050-6252. - STAMPA. - Year 2018 Volume 6:Issue 3(2018), pp. 120-132. [10.1680/jsuin.17.00059]

The Wilhelmy method, a critical and practical review

C. Della Volpe;S. Siboni
2018-01-01

Abstract

A brief history of the Wilhelmy technique for surface tension and contact angle measurements introduces the equation and the methods necessary to correctly apply this modern and automatic procedure. Many simple practices may avoid systematic errors and allow reliable results to be obtained for both quantities. The paper analyses simple runs, i.e. the application to standard shapes as cylinders and parallallelepipeds, but also non-simple runs, i.e. to non- standard samples such as disk-shaped, to porous and flexible samples, to more viscous fluids, etc. Many experimental details such as the size ratio of specimens to the liquid container may be extremely important; their role and the history of discussion about those topics are reviewed and discussed herein.
2018
Issue 3
Della Volpe, C.; Siboni, S.
The Wilhelmy method, a critical and practical review / Della Volpe, C.; Siboni, S.. - In: SURFACE INNOVATIONS. - ISSN 2050-6252. - STAMPA. - Year 2018 Volume 6:Issue 3(2018), pp. 120-132. [10.1680/jsuin.17.00059]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/207821
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