Superhydrophobic coatings prepared from fluorinated silica nanoparticles and fluororesin: wetability, chemical stability, mechanical durability and water repellency
Abstract
Purpose
The purpose of this study is to explore the interfacial adhesion between superhydrophobic coatings FC-X (X = 1%, 2%, 3%, 4% and 5%) and the concrete substrate, along with the impact of FC-X on the water repellency characteristics of the concrete substrate.
Design/methodology/approach
One synthetic step was adopted to prepare novel F-SiO2 NP hybrid fluororesin coating. The impact of varying mass fractions of F-SiO2 NPs on the superhydrophobicity of FC-X was analyzed and subsequently confirmed through water contact angle (WCA) measurements. Superhydrophobic coatings were simply applied to the concrete substrate using a one-step spraying method. The interfacial adhesion between FC-X and the concrete substrate was analyzed using tape pasting tests and abrasion resistance measurements. The influence of FC-X on the water repellency of the concrete substrate was investigated through measurements of water absorption, impermeability and electric flux.
Findings
FC-4% exhibits excellent superhydrophobicity, with a WCA of 157.5° and a sliding angle of 2.3°. Compared to control sample, FC-X exhibits better properties, including chemical durability, wear resistance, adhesion strength, abrasion resistance, water resistance and impermeability.
Practical implications
This study offers a thorough investigation into the practical implications of enhancing the durability and water repellency of concrete substrates by using superhydrophobic coatings, particularly FC-4%, which demonstrates exceptional superhydrophobicity alongside remarkable chemical durability, wear resistance, adhesion strength, abrasion resistance, water resistance and impermeability.
Originality/value
Through the examination of the interfacial adhesion between FC-X and the concrete substrate, along with an assessment of FC-X’s impact on the water repellency of the concrete, this paper provides valuable insights into the practical application of superhydrophobic coatings in enhancing the durability and performance of concrete materials.
Keywords
Acknowledgements
The authors are grateful for the support from the Natural Science of Colleges and Universities in Jiangsu Province (22KJB430009), the Vocational College Student Innovation and Entrepreneurship Training Program in Jiangsu Province (G-2023–1216), the Science Foundation of Nanjing Vocational College of Information Technology (YB20220101) and the Natural Science Foundation of Jiangsu Province (BK20211370).
Data Availability Statement: The data that support the findings of this study are available in the Electronic Supplementary Information (ESI) of this article.
Citation
Hou, P., Qian, Z., Hu, M.X., Liu, J.Q., Zhang, J., Zhao, W., Li, X., Wang, Y., Huang, H. and Ran, Q.P. (2024), "Superhydrophobic coatings prepared from fluorinated silica nanoparticles and fluororesin: wetability, chemical stability, mechanical durability and water repellency", Pigment & Resin Technology, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/PRT-01-2024-0006
Publisher
:Emerald Publishing Limited
Copyright © 2024, Emerald Publishing Limited