Obtención de superficies superhidrofóbicas de baja histéresis

CINTIA CONTRERAS; DARÍO ARRUA, DANIEL SERRANO, GUSTAVO PASTRANA, MIRIAM STRUMIA AND CECILIA ALVAREZ.

Santa Fé

Congreso; 14° Congreso Internacional de Metalurgia y Materiales; 2014

The control of the wettability of solid surfaces is drawing increasing interest from both theoretical and practical approaches. Wettability is directly related to surface energy and is one of the primary surface properties of solid materials. In superhydrophobic surfaces there are two possible wetting states on rough surfaces: Wenzel and Cassie-Baxter states. In Wenzel state water droplets pin the surface in a wet-contact mode without any movement, even if the surface is titled to vertical position or turned upside down (low hysteresis). In Cassie-Baxter state water droplet adopts a non-wet contact mode on the solid surface and can roll off easily owing to their low water adhesion (high hysteresis). In previous studies, superhydrophobic surfaces with a control of wettability were obtained by micro/nanostructuration of polypropylene with titanium dioxide nanoparticles de (NPs) functionalized with trimethoxypropyl silane. In this work, we proposed the modification of PP surface with NPs previously grafted with styrene by atom transfer radical polymerization (ATRP) to obtain superhydrophobic surfaces with low hysteresis.