Abstract
AbstractThe surfaces of commercially available polyester (PET) and polypropylene (PP) are superhydrophobically modified via the deposition of polydimethylsiloxane (PDMS)‐coated SiO2 nanoparticles (P‐SiO2) and PDMS binder. The adhesion of P‐SiO2 is stronger on PET than on PP due to a stronger chemical interaction between PET and PDMS, which is attributed to the higher surface energy of PET than PP. The waterproof ability and oil separation rate of the P‐SiO2‐coated PET (dip‐PET) membranes are studied as a function of membrane thickness, and the influence of oil viscosity on the oil separation efficiency is investigated. Optimal membrane thickness should be selected in a given environment for the facile oil–water separation and the dip‐PET membrane is chemically stable and can be used repetitively for oil–water separation. Finally, an automated prototype instrument is introduced for the dip‐coating process. It is suggested that our dip‐PET is a promising solution for oil–water separation in real‐world oil‐spill applications.
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