Organic-inorganic composite nanocoatings with superhydrophobicity and thermal stability
ISSN: 0369-9420
Article publication date: 22 November 2018
Issue publication date: 2 January 2024
Abstract
Purpose
This paper aims to investigate the thermal stability and hydrophobicity of difference alkyl chain of silanes with silicon (Si) micro- and nanoparticles.
Design/methodology/approach
Sol-gel methods have been used to design superhydrophobic glass substrates through surface modification by using low-surface-energy Isooctyl trimethoxysilane (ITMS) and Ethyl trimethoxysilane (ETMS) solution. Hierarchical double-rough scale solid surface was built by Si micro- and nanoparticles to enhance the surface roughness. The prepared sol was applied onto glass substrate using dip-coating method and was dried at control temperature of 400°C inside the tube furnace.
Findings
The glass substrate achieved the water contact angle as high as 154 ± 2° and 150.4 ± 2° for Si/ITMS and Si/ETMS films, respectively. The Si/ITMS and Si/ETMS also were equipped with low sliding angle as low as 3° and 5°, respectively. The Si micro- and nanoparticles in the coating system have created nanopillars between them, which will suspend the water droplets. Both superhydrophobic coatings have showed good stability against high temperature up to 200°C as there are no changes in WCA shown by both coatings. Si/ITMS film sustains its superhydrophobicity after impacting with further temperature up to 400°C and turns hydrophobic state at 450°C.
Research limitations/implications
Findings will be useful to develop superhydrophobic coatings with high thermal stability.
Practical implications
Sol method provides a suitable medium for the combination of organic-inorganic network to achieve high hydrophobicity with optimum surface roughness.
Originality/value
Application of different alkyl chain groups of silane resin blending with micro- and nanoparticles of Si pigments develops superhydrophobic coatings with high thermal stability.
Keywords
Acknowledgements
The authors thank the technical and financial assistance of UM Power Energy Dedicated Advanced Centre (UMPEDAC) and the Higher Institution Centre of Excellence (HICoE) Program Research Grant, UMPEDAC - 2016 (MOHE HICOE – UMPEDAC).
Citation
Syafiq, A., Pandey, A.K., Balakrishnan, V., Shahabuddin, S. and Rahim, N.A. (2024), "Organic-inorganic composite nanocoatings with superhydrophobicity and thermal stability", Pigment & Resin Technology, Vol. 53 No. 1, pp. 10-16. https://doi.org/10.1108/PRT-04-2018-0038
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited