Surface modification of anhydrite whiskers and their potential application for durable superhydrophobic coatings
| Autor: | Wu Li, Hong Tianzeng, Xueying Nai, Yaping Dong, Yabin Wang, Xin Liu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
General Chemical Engineering Whiskers Mineralogy 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Superhydrophobic coating 0104 chemical sciences Tetraethyl orthosilicate Contact angle chemistry.chemical_compound X-ray photoelectron spectroscopy chemistry Coating engineering Surface modification Composite material 0210 nano-technology Layer (electronics) |
| Zdroj: | RSC Advances. 7:53301-53305 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c7ra10908c |
| Popis: | Durability issues have been an obstacle for superhydrophobic coating applications for a long time. Here, we report the modification of anhydrite whiskers that can be used for the fabrication of superhydrophobic coatings with high durability. Anhydrite whiskers with core/shell structures are prepared via hydrolysis and condensation processes of tetraethyl orthosilicate (TEOS) followed by silane modification. Modified anhydrite whiskers were examined by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results indicate that anhydrite whiskers exhibit an obviously hydrophobic quality after modification, reaching a contact angle of up to 123°. The thickness of the surface modification layer is 10–20 nm. The modified anhydrite whiskers were used to fabricate a superhydrophobic coating. Modified anhydrite whiskers create a rough structure on the glass substrate surface. This roughness develops a Cassie–Baxter regime, enhancing the superhydrophobicity of the coating. The water contact angle of the coating is above 150°. This method is expected to apply to similar materials for the fabrication of durable superhydrophobic coatings. |
| Databáze: | OpenAIRE |
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