Superhydrophobic durable coating based on UV-photoreactive silica nanoparticles
Article first published online: 30 JUN 2014
Copyright © 2014 Wiley Periodicals, Inc.
Journal of Applied Polymer Science
Volume 131, Issue 23, December 5, 2014
How to Cite
2014), Superhydrophobic durable coating based on UV-photoreactive silica nanoparticles. J. Appl. Polym. Sci., 131, 41122, doi: 10.1002/app.41122, , , and (
- Issue published online: 10 SEP 2014
- Article first published online: 30 JUN 2014
- Manuscript Accepted: 8 JUN 2014
- Manuscript Revised: 2 JUN 2014
- Manuscript Received: 15 JAN 2014
- hydrophobic coatings;
- silica nanoparticles;
- ultraviolet curing
Superhydrophobic surfaces can be obtained by tailoring both the chemistry and roughness topography, mimicking the Lotus leaf characteristics. Most of the synthetic superhydrophobic surfaces reported have been composed of micro and nanoparticles (NPs) embedded in polymer-based coatings. The particles which tailor the topography are bonded to the base polymers by weak secondary forces. Consequently, the topography integrity is highly affected by handling and surface drag making them unsuitable for long term applications. This work is focused on promoting covalent bonding between the NPs and the base polymer to obtain durable superhydrophobic surfaces. The rough topography was achieved by ultraviolet (UV) curing of SiO2 NPs containing a photoreactive benzophenone moiety in addition to methylated fumed silica NPs which can bind covalently to the polymer base coating, on UV radiation. The hydrophobic chemistry was obtained by fluoroalkylsilane top coating. Coating durability was evaluated using surface air drag and accelerated weathering conditions (UV radiation, humidity and temperature). Results indicated that the proposed approach resulted in superhydrophobic surfaces having high contact angle (>150°) and low sliding angle (<10°) with improved long term durability. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41122.