Abstract
<p><span lang="EN-US">Using the layer wicking method (TLW method) the electron-donor interactions of surface free energy of the organic liquids: benzene (C<sub>6</sub>H<sub>6</sub>), toluene C<sub>6</sub>H<sub>5</sub>CH<sub>3</sub>), and tetrahydrofuran ((CH<sub>2</sub>)<sub>4</sub>O) was determined. <span lang="EN-US">For this purpose the penetration rate measurements of these liquids in the porous layers of silica gel and alumina were performed. </span></span>The obtained values of the electron-donor parameter of surface free energy of the studied organic liquids were compared with the literature data obtained by the direct measurement of the interface tensions of water/organic liquids.</p>
Highlights
The surface free energy of solids is a very important parameter determining the interfacial properties of the solid-liquid and solid-gas interfaces
A contact with the aqueous phase, an exposition to air, as well as several limitations resulting from volatility, solubility, viscosity and thermal instability of the applied liquids
The aim of this paper was to determine the electron-donor parameter of surface free energy of benzene, toluene and tetrahydrofuran via the wicking experiments using the porous layers of silica gel 60 and alumina
Summary
The surface free energy of solids is a very important parameter determining the interfacial properties of the solid-liquid and solid-gas interfaces. It is not possible to determine directly the surface free energy of solids, there are numerous indirect methods which can be applied. Lucyna Hołysz and Aleksandra Szcześ determining the interface properties requires some conditions e.g. a contact with the aqueous phase, an exposition to air ( implying adsorption of water vapour), as well as several limitations resulting from volatility, solubility, viscosity and thermal instability of the applied liquids. One of them is that proposed by van Oss et al
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