Fabrication of superhydrophobic surfaces with perfluorooctanoic acid modified TiO2/polystyrene nanocomposites coating
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XiangHui Xua, b, ZhaoZhu Zhanga, , and Weimin Liua
aState Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Tianshui Road 18th, Lanzhou 730000, PR China
bGraduate School, Chinese Academy of Sciences, Beijing 100039, PR China
Available online 25 March 2009.
A superhydrophobic perfluorooctanoic 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.
Keywords: Superhydrophobic surface; TiO2 nanoparticles; Chemical modification; Nanocomposites coating; Drying temperature