Solid surface tension components and their error limits induced by contact angle measurement in application of the van Oss–Chaudhury–Good approach

Summary This work focuses on the influence of extractives during wetting measurements on wood. Fresh and aged veneers of extracted and non-extracted heart- and sapwood of pine were prepared, and the Wilhelmy method was used to study the wettability of these veneers. In this method, the force acting on the veneers was measured during immersion in and withdrawal from a series of probe liquids. The results suggest that some of the probe liquids become severely contaminated by extractives during the measurements on the non-extracted veneers, and that this strongly affects the wood wetting measurements. The contamination is effectively detected as a distinct decrease in the surface tension of the liquids caused by dissolution or presence of wood extractives at the wood-liquid interface. It is important to note that such contamination may also occur during wetting studies on wood using other contact angle measurement techniques. The most obvious contamination occurred in the case of measurements on non-extracted veneers immersed in water and formamide. Generally, no contamination was detected in the case of measurements on extracted wood veneers. The Wilhelmy method may provide an efficient means for recording and control of any contamination of the probe liquids that may arise during wetting studies on wood.

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Interpretation of contact angle measurements on two different fluoropolymers for the determination of solid surface tension

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2005.05.001 ◽

2005 ◽

Vol 291 (2) ◽

pp. 497-506 ◽

Cited By ~ 51

Author(s):

H. Tavana ◽

F. Simon ◽

K. Grundke ◽

D.Y. Kwok ◽

M.L. Hair ◽

...

Keyword(s):

Surface Tension ◽

Contact Angle ◽

Solid Surface ◽

Angle Measurements ◽

Contact Angle Measurements ◽

Solid Surface Tension

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A Bespoke Contact Angle Measurement Software and Experimental Setup for Determination of Surface Tension

Procedia Technology ◽

10.1016/j.protcy.2013.12.219 ◽

2013 ◽

Vol 11 ◽

pp. 487-494 ◽

Cited By ~ 6

Author(s):

Chin Fhong Soon ◽

Wan Ibtisam Wan Omar ◽

Nafarizal Nayan ◽

Hatijah Basri ◽

Martha Bt. Narawi ◽

...

Keyword(s):

Surface Tension ◽

Contact Angle ◽

Contact Angle Measurement ◽

Angle Measurement ◽

Experimental Setup ◽

Measurement Software

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On the Influence of Relative Humidity on the Contact Angle of a Water Droplet on a Silicon Wafer

Volume 7A: Fluids Engineering Systems and Technologies ◽

10.1115/imece2013-63781 ◽

2013 ◽

Author(s):

J. L. Perez-Diaz ◽

M. A. Alvarez-Valenzuela ◽

I. Valiente-Blanco ◽

S. Jimenez-Lopez ◽

M. Palacios-Cuesta ◽

...

Keyword(s):

Surface Tension ◽

Contact Angle ◽

Relative Humidity ◽

Silicon Wafer ◽

Water Droplet ◽

Measurement Techniques ◽

Contact Angle Measurement ◽

Angle Measurement ◽

Wafer Surface ◽

Free Energy Surface

Contact angle analysis of liquids on surfaces has been extensively used to evaluating solid surface free energy, surface tension, and surface wetting characteristics. Despite the great interest in the contact angle, reported measurements has shown a high variety, which is often related to different contact angle measurement techniques or substrate preparation and oxidation among others. In addition, it is well know, that surface tension and contact angle are modified with temperature. However, no attention has been paid to the influence of the relative humidity (RH) in surface tension or contact angle measurements. In a previous work, we have demonstrated that (for a constant temperature) surface tension on a suspended droplet decreases linearly with RH in the air. In this paper, contact angle of a water droplet on a silicon wafer surface is studied and its relationship with the relative humidity in the air investigated.

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