Figure 5
The water (10 μL) contact angle of CA (a) and filter paper (b) in air, (c) The petroleum ether-infused CA membrane cannot absorb the water (dyed by reactive red) from petroleum ether, (d) The petroleum ether-infused filter paper can absorb the water (dyed by reactive red) from petroleum ether, (e) Under-oil (petroleum ether) environment, the oil in filter paper is displaced by a drop of water (the dynamic change of water contact angle under petroleum ether), (f) The CCl4-infused filter paper, which is de-wetted by water, cannot separate the water/CCl4 mixture, (g) The CCl4-infused CA can separate the water/CCl4 mixture.
