Preprint Article Version 3 This version is not peer-reviewed

The Measurement of the Surface Energy of Solids by Sessile Drop Accelerometry

Version 1 : Received: 17 August 2017 / Approved: 17 August 2017 / Online: 17 August 2017 (16:48:35 CEST)
Version 2 : Received: 11 September 2017 / Approved: 12 September 2017 / Online: 12 September 2017 (04:26:50 CEST)
Version 3 : Received: 26 October 2017 / Approved: 26 October 2017 / Online: 26 October 2017 (10:20:58 CEST)

How to cite: Calvimontes, A. The Measurement of the Surface Energy of Solids by Sessile Drop Accelerometry. Preprints 2017, 2017080062 (doi: 10.20944/preprints201708.0062.v3). Calvimontes, A. The Measurement of the Surface Energy of Solids by Sessile Drop Accelerometry. Preprints 2017, 2017080062 (doi: 10.20944/preprints201708.0062.v3).

Abstract

A new method, the sessile drop accelerometry (SDACC) for the study and measurement of the interfacial energies of solid-liquid-gas systems, is tested and discussed in this study. The laboratory instrument and technique –a combination of a drop shape analyzer with high-speed camera and a laboratory drop tower- and the evaluation algorithms, were designed to calculate the interfacial energies as a function of the geometrical changes of a sessile droplet shape due to the effect of “switching off” gravity during the experiment. The method bases on the thermodynamic equilibrium of the system interfaces and not on the balance of bi-dimensional tensions on the solid-liquid-gas contour line. A comparison of the mathematical model that supports the method with the widely accepted Young`s equation is discussed in this study.

Subject Areas

surface energy; interfacial energy; surface tension; wetting model; wetting thermodynamics; sessile drop shape; microgravity

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