Fabrication of superhydrophobic surfaces with perfluorooctanoic acid modified TiO2/polystyrene nanocomposites coating

A superhydrophobic perfluotooctanoic acid modified TiO2/polystyrene nanocomposites coating was fabricated by a facile spraying process. As modified by perfluorooctanoic acid, the TiO2/polystyrene nanocomposites changed from hydrophilic (86) to hydrophobic (166). The wettability can be adjusted by controlling the drying temperature and the content of modified TiO2 nanoparticles. When the weight ratio of perfluorooctanoic acid modified TiO2 to polystyrene was 1: 1, the maximum of contact angle was obtained at 180 C. As the content of perfluorooctanoic acid modified TiO2 increased, the maximum of contact angle was achieved at 100 C. (C) 2009 Elsevier B.V. All rights reserved.