RT Journal Article
T1 Synthesis and characterization of superhydrophobic surfaces prepared from silica and alumina nanoparticles on a polyurethane polymer matrix
A1 Carreño, Francisco
A1 Gude, María
A1 Calvo, Silvia
A1 Rodríguez De La Fuente, Óscar
A1 Carmona Tejero, Noemí
AB An economical approach to synthesize superhydrophobic surfaces with silica and alumina nanoparticles on a polyurethane-based paint is presented. The surfaces have been prepared by spraying functionalized nanoparticles on the partially cured polymer matrix, and they have been characterized with Fourier transform infrared spectroscopy, scanning electron microscopy, atomic force microscopy and water contact angle measurements. Results show that the gel point is reached 26 min after the application of the paint when it is cured at 70 degrees C. At that moment, rather than submerging into the paint, the sprayed nanoparticles remain partially exposed at the surface. Following this approach, we have found that, for samples including 0.5 wt% of polydimethylsiloxane-functionalized nanoparticles, water droplets show contact angles higher than 150 degrees, have a negligible attachment to the substrate and easily roll off the substrates. The application method is fast and scalable to relatively wide areas. Also, nanoparticles are located only at the surface, thus reducing manufacturing costs.
PB Elsevier
SN 0300-9440
YR 2019
FD 2019
LK https://hdl.handle.net/20.500.14352/91644
UL https://hdl.handle.net/20.500.14352/91644
LA eng
NO F. Carreño, M. R. Gude, S. Calvo, O. Rodríguez De La Fuente, and N. Carmona, Progress in Organic Coatings 135, 205 (2019).
NO Universidad Complutense de Madrid
NO Fundación para la Investigación, Desarrollo y Aplicación de Materiales Compuestos (España)
DS Docta Complutense
RD 18 dic 2025