Abstract
Abstract Superhydrophobic and transparent polymethylhydroxysiloxane (PMHOS)/silica ormosil aerogel hybrids were prepared successfully by mixing of PMHOS with various weight percentages of silica ormosil aerogels (as synthesized from methyltriethoxysilane (MTES) and methyltrimethoxysilane (MTMS) precursors) in separate seal perfume glass vials. The hybrids were spin coated on glass substrate at 1000 rpm for 60 seconds and used for further analysis. The surface morphology and chemical compositions of the hybrids were analyzed by high resolution scanning electron microscopy, high resolution transmission electron microscopy, atomic force spectroscopy, adsorption and desorption isotherm, and X-ray photoelectron spectroscopy. The transparency, thermal decomposition and static contact angle (SCA) of each sample were measured by UV-Visible spectrophotometer, TGA and drop shape analysis system, respectively. The spin coated substrates showed good superhydrophobic properties, thermal stability as well as transparency on the glass substrates.
Highlights
Transparency of a substrate is an important factor for coating applications
Surface roughness (Ra) and root mean square roughness (RMS) are almost similar property for the fabrication of superhydrophobic surface, though the surface property mainly depends on the roughness maximum (Ra) value than the RMS value of the coated surface
The surface of the materials showed the formation of hierarchical surface morphology with high roughness created on the surface by the introduction of silica ormosil aerogel to the polymethylhydroxysiloxane
Summary
Transparent substrates with several surface properties such as superhydrophilic (contact angle, CA, ≤5°), hydrophilic (CA,
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