Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 462, Issue -, Pages 47-50Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2017.02.006
Keywords
Thermal poling; Glass surface; Wetting angle; Soda lime silicate
Funding
- joint DAAD-IKYDA [57161434]
- German Science Foundation [PP 1594, WO 1220/9-2]
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Thermal poling, i.e., exposure of a glass to a DC electrical field at moderate temperature, enables the generation of an anisotropic surface layer. Cation motion on the anode side results in the formation of an internal gradient in the electrical potential which can be frozen-in upon cooling. This is accompanied with a change in the polarity of the anode surface and, hence, a change in surface wettability. In this article, we study the effect of thermal poling on the wettability of soda-lime silicate glasses. We confirm a poling-induced increase in surface hydrophobicity on the air-side of commercial float glass, with a water wetting angle increase of around 20 degrees for poling at 210 degrees C and 1.5 kV. The effect is persistent after storage for three months under ambient conditions. Significant variation between air and tin-side of the float glass indicates strong compositional dependence and offers a route for tailoring the surface chemical properties of functional glass substrates. (C) 2017 Elsevier B.V. All rights reserved.
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