Fig. 6. Schematic diagram of separating an OWM by using different superwetting porous materials with different separating ways. (a) Removing oil phase from the mixture by a superhydrophobic porous membrane. (b) Removing water phase from the mixture by a pre-water-wetted underwater superoleophobic porous membrane. (c) Removing oil by a superhydrophobic/superoleophilic 3D porous material based on an absorption way.
