Speaker
Description
Katerina Kraljevskaa,*, Tanja Deckert-Gaudigb,c , Vladimir Ivanovskia
a Ss. Cyril and Methodius University, Faculty of Natural Science and Mathematics, Skopje, Macedonia
b Institut für Physikalische Chemie, Friedrich-Schiller-Universität Jena, Lessingstr. 10
07743 Jena, Germany
c IPHT- Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, D-07745 Jena, Germany
* katerina.kraljevska0808@gmail.com
The surface of silicate glass can be modified with various organosilanes to obtain a hydrophobic surface, thereby enhancing water repellency without compromising transparency. It has practical applications such as car windows, solar panels, construction materials and medical equipment. The modification of glass surfaces involves the formation of a nanofilm using hydrophobic materials and increasing the surface roughness.
The optimal modification procedure with 3-aminopropyltriethoxysilane (APTES) was investigated under different conditions. Experiments were performed with hydrolyzed and non-hydrolyzed APTES, with or without the addition of sodium dodecyl sulfate (SDS) as a second layer. One characteristic for all experiments was the low concentration of APTES and SDS (0.01 M). Previous investigations using high concentrations of APTES produced a hydrophobic glass surface [1].
The modified samples were analyzed using infrared (IR) spectroscopy, two-trace two-dimensional correlation spectroscopy (2T2D-COS) [2] and atomic force microscopy (AFM). Contact angle and surface energy measurements were evaluated through employing a drop shape analyzer. The results demonstrated successful silanization of the surface, obtaining a contact angle of 70–80°. Although the measurement showed a nanolayer of siloxane, the attachment of SDS as a second layer is questionable.
Keywords: silicate glass, hydrophobicity, silane, APTES, IR specular reflectance, 2Т2D-COS, contact angle, AFM
[1] V. Ivanovski, G. Viscusi, S. Liparoti, I. Piwoński, Colloids Surf. A: Physicochem. Eng. Asp. 702 (2024) 134969.
[2] V. Ivanovski, Th. G. Mayerhöfer, Spectrochim Acta A Mol Biomol. Spectrosc., 336 (2025) 126038.
