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Spray-Deposition and Photopolymerization of Organic–Inorganic Thiol–ene Resins for Fabrication of Superamphiphobic Surfaces

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posted on 09.07.2014, 00:00 by Li Xiong, Laken L. Kendrick, Hannele Heusser, Jamie C. Webb, Bradley J. Sparks, James T. Goetz, Wei Guo, Christopher M. Stafford, Michael D. Blanton, Sergei Nazarenko, Derek L. Patton
Superamphiphobic surfaces, exhibiting high contact angles and low contact angle hysteresis to both water and low surface tension liquids, have attracted a great deal attention in recent years because of the potential of these materials in practical applications such as liquid-resistant textiles, self-cleaning surfaces, and antifouling/anticorrosion coatings. In this work, we present a simple strategy for fabricating of superamphiphobic coatings based on photopolymerization of hybrid thiol–ene resins. Spray-deposition and UV photopolymerization of thiol–ene resins containing hydrophobic silica nanoparticles and perfluorinated thiols provide a multiscale topography and low-energy surface that endows the surface with superamphiphobicity. The wettability and chemical composition of the surfaces were characterized by contact-angle goniometry and X-ray photoelectron spectroscopy, respectively. The hierarchical roughness features of the thiol–ene surfaces were investigated with field-emission scanning electron microscopy. Droplet impact and sandpaper abrasion tests indicate the coatings respectively possess a robust antiwetting behavior and good mechanical durability.