Facile fabrication of superhydrophobic coatings on concrete substrate
ISSN: 0369-9420
Article publication date: 5 August 2021
Issue publication date: 13 May 2022
Abstract
Purpose
The purpose of this study is to prepare a chemically stable superhydrophobic coating with remarkable mechanical properties and concrete protective properties.
Design/methodology/approach
One synthetic step was adopted to prepare superhydrophobic coating. The process and product were analyzed and confirmed by fourier transform-infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), water contact angle (WCA), transmission electron microscopy (TEM), scanning electron microscope (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The mechanical properties were confirmed by tensile test. The concrete protective properties were confirmed by solution immersion test and rapid chloride migration coefficient test.
Findings
MSiO2 nanoparticles (NPs) were chosen to enhance the hydrophobicity of fluorosilicone coatings. With a 4:1 mass ratio of fluorosilicone resin and MSiO2 NPs, the coatings show superhydrophobicity with a WCA of 156° and a SA of 3.1°. In addition, the tensile mechanical property was improved, and the chloride ion diffusion coefficient was decreased significantly after the addition of MSiO2 NPs.
Practical implications
This new fluorosilicone coating hybrid by MSiO2 NPs could be applied as a concrete protective layer with properties of self-cleaning, antifouling, etc.
Originality/value
Introduction of MSiO2 NPs hybrid to prepare fluorosilicone coating with superhydrophobicity on concrete surface has not been systematically studied previously.
Keywords
Acknowledgements
This work was supported financially by the National Key R&D Program of China (No. 2017YFB0309904), the National Natural Science Foundation of China (No. 52008188) and National Natural Science Foundation of China-Joint Fund of Shandong Province (U1706222). The authors thank the International Science Editing (www.internationalscienceediting.com) for editing this manuscript.
Citation
Hou, P., Zhan, Z., Qi, S., Ma, Y., Li, B., Sun, D. and Ran, Q. (2022), "Facile fabrication of superhydrophobic coatings on concrete substrate", Pigment & Resin Technology, Vol. 51 No. 4, pp. 420-425. https://doi.org/10.1108/PRT-01-2021-0010
Publisher
:Emerald Publishing Limited
Copyright © 2021, Emerald Publishing Limited