Fabrication of highly ordered porous superhydrophobic polystyrene films by electric breath figure and surface chemical modification

Abstract To apply SiO2 nanoparticles to assist the formation of polystyrene, PS, film via the electric breath figure, EBF, method in relation to various voltages, the obtained PS/SiO2 films showed highly ordered pore structures and the pore diameter was gradually reduced with the applied voltage increase. On these PS/SiO2 film surfaces, water contact angle was found at 110.3° for 0 V sample and 131.4° for 3000 V sample, however, on chlorotrimethylsilane deposited film surface was greatly enhanced to at 129.2° for 0 V sample and 150.1° for 3000 V sample. This indicated that this physical and chemical combined method can form highly ordered porous structure with superhydrophobic behavior.

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