A simple spray approach to fabricate superhydrophobic coatings on tile and glass substrates is presented.Commercial available polyphenylene sulfide (PPS) and hydrophobic silica (H—SiO2) powder were suspended in ethanol and the mixed suspensions were spray on substrates.After dried at different temperatures

surface coatings with different hydrophobicity were obtained.By observing the surface morphologies with scanning electron microscope (SEM) and atomic force microscope (AFM)

and measuring water contact angles with a contact angle system

factors affecting the morphology

roughness and contact angle of the surface coatings

such as thermal treatment temperature and the weight ratio of H—SiO2 to PPS

were investigated in detail.With the increase of the thermal treatment temperature

both the surface roughness and the contact angle increased when the temperature was lower than 280℃.As the weight ratio of H—SiO2 to PPS rose from 1∶10 to 1∶1

more H—SiO2 powders accumulated on the surface

leading to a significant increase of hydrophobicity.The surface coating obtained at 280℃ with the weight ratio of H—SiO2 to PPS 1∶1 showed a water contact angle higher than 150° and a sliding angle lower than 4°

exhibiting fascinating superhydrophobic properties.The surface coating could remain superhydrophobicity upon a further increase in thermal treatment temperature or the amount of H—SiO2 powder.Moreover

the surface coatings showed high contact angles

larger than 150°

for all the solutions with pH ranging from 1 to 14. The abrasion resistant property of the asprepared superhydrophobic surface coating was tested using a homemade setup.Being scraped by freely-falling sands

the superhydrophobic coating could keep its high hydrophobicity

while a commercial hydrophobic coating transformed from hydrophobicity to hydrophilicity.This result implied our superhydrophobic surface coating was very stable.Moreover

chalk powders on the superhydrophobic surface coatings could easily be washed off with water

indicating good self-cleaning properties.The presented approach is convenient and can be potentially applied in fabrication of superhydrophobic surfaces in large scale.