Gypsum materials are suffering a shortened service life on account of its poor resistance to moisture and dirt. To overcome such drawbacks, the SiO2/silicone hybrid superhydrophobic surface was introduced on the gypsum surface by the cross-linking of siloxane via sol–gel method. In this study, chemical property and microtopography of the coated surface were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and atomic force microscope (AFM), respectively. Wettability and moisture absorption/desorption tests were carried out to evaluate the superhydrophobicity and moisture resistance of the samples. The results showed that the treated gypsum board had a lower moisture absorption/desorption ratio, compared with the untreated gypsum board (PG). Besides, the coating agent prepared with ethanol and hydrophilic nanosilica particles provided good superhydrophobicity and an optimum moisture-resistance property to the gypsum board. The prepared superhydrophobic surface can endow the material with a self-cleaning effect, protecting it from dust and liquid contamination. The effect mechanism of the solvent and silica particle property on the moisture resistance was discussed in detail. Herein, a green approach is proposed to produce a cleaner gypsum product with extended service life.
SiO2/silicone hybrid superhydrophobic gypsum board was obtained via sol–gel method.
Superhydrophobicity endowed gypsum board with moisture resistance and self-cleaning effect.
The sample with ethanol and hydrophilic silica had the lowest moisture absorption ratio.
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This work was supported by the National Key R&D Program of China (grant number 2016YFC0700905-04).
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Jiang, Q., Huang, J., Ma, B. et al. SiO2/silicone hybrid superhydrophobic coating on gypsum-based materials with self-cleaning and moisture resistance. J Sol-Gel Sci Technol (2020). https://doi.org/10.1007/s10971-020-05347-3
- SiO2/silicone hybrid superhydrophobic surface
- Gypsum-based material
- Moisture absorption
- Moisture desorption