The commercial polyester (PET) and polypropylene (PP) membrane were coated with polydimethylsiloxane (PDMS)-deposited SiO₂ nanoparticles and they showed a water contact angle greater than 150^o. The adhesion of PDMS-SiO₂ was stronger on PET than PP and it was confirmed with scanning electron microscopy (SEM), Fourier transform-infrared (FT-IR) spectroscopy, water contact angle and water weight gain measurements. The PDMS-SiO₂ coated PET (dip-PET) showed high selectivity towards oil separation from the oil-water mixture, durable hydrophobicity after exposure to strong acidic/basic solutions. It was also demonstrated that the repetitive use of dip-PET for oil-water separation and small scale of oil collecting device using dip-PET as the filter. We suggest that our dip-PET membrane could be used as the cover of oil absorbent pads and oil-water separation filter.