Abstract
The superhydrophobic filtration fabric (SFF), with a water contact angle (WCA) higher than 150°, was prepared by a facile dip-coating method through decorating the surface with poly(dimethyl siloxanes) (PDMS)/silica (SiO2) composite coating. To improve the roughness of the surface, toluene and ethanol was used as co-solvent to induce microphase separation. When the mass ratio of ethanol to toluene was 0.6, the SFF showed a high WCA of 152° with some porous honeycomb structures distributed on the surface. Moreover, the as-prepared SFF showed both superhydrophobicity and superoleophilicity, and could effectively separate the mixture of water and oil. Based on the study, the separation mechanism was also proposed.
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