Wettability of Amphoteric Surfaces: The Effect of pH and Ionic Strength on Surface Ionization and Wetting

We present a novel theory to predict the contact angle of water on amphoteric surfaces, as a function of pH and ionic strength. To validate our theory, experiments were performed on two commonly used amphoteric materials, alumina (Al2O3) and titania (TiO2). We find good agreement at all pH values, a...

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Veröffentlicht in:	Langmuir 2018-12, Vol.34 (50), p.15174-15180
Hauptverfasser:	Virga, Ettore, Spruijt, Evan, de Vos, Wiebe M, Biesheuvel, P. M
Format:	Artikel
Sprache:	eng
Schlagworte:	aluminum oxide contact angle droplets energy Gibbs free energy ionic strength ionization salt concentration solutes titanium dioxide wastewater treatment wettability
Online-Zugang:	Volltext
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