Superhydrophobic Hybrid Inorganic-Organic Thiol-ene Surfaces Fabricated via Spray-Deposition and Photopolymerization
Polymers and High Performance Materials
We report a simple and versatile method for the fabrication of superhydrophobic inorganic-organic thiol-ene coatings via sequential spray-deposition and photopolymerization under ambient conditions. The coatings are obtained by spray-deposition of UV-curable hybrid inorganic-organic thiol-ene resins consisting of pentaerythritol tetra(3-mercaptopropionate) (PETMP), triallyl isocyanurate (TTT), 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane (TMTVSi), and hydrophobic fumed silica nanoparticles. The spray-deposition process and nanoparticle agglomeration/dispersion provide surfaces with hierarchical morphologies exhibiting both micro- and nanoscale roughness. The wetting behavior, dependent on the concentration of TMTVSi and hydrophobic silica nanoparticles, can be varied over a broad range to ultimately provide coatings with high static water contact angles (>150 degrees), low contact angle hysteresis, and low roll off angles (<5 degrees). The cross-linked thiol-ene coatings are solvent resistant, stable at low and high pH, and maintain superhydrophobic wetting behavior after extended exposure to elevated temperatures We demonstrate the versatility of the spray-deposition and UV-cure process on a variety of substrate surfaces including glass, paper, stone, and cotton fabric.
ACS Applied Materials and Interfaces
Sparks, B. J.,
Patton, D. L.,
Goetz, J. T.,
Patton, D. L.
(2013). Superhydrophobic Hybrid Inorganic-Organic Thiol-ene Surfaces Fabricated via Spray-Deposition and Photopolymerization. ACS Applied Materials and Interfaces, 5(5), 1811-1817.
Available at: http://aquila.usm.edu/fac_pubs/7691