Figure 4: Batch separation of free oil and water and four component mixtures.
From: Hygro-responsive membranes for effective oil–water separation
(a) Separation apparatus with water above the membrane. (b) Rapeseed oil is added above water. (c) Water permeates through the membrane whereas rapeseed oil is retained. Insets, water droplet on a surface spin-coated with a 20 wt% fluorodecyl POSS+x-PEGDA blend, rapeseed oil droplet on top of the water droplet, rapeseed oil droplet on the reconfigured surface. (d) TGA data for the permeate and the retentate. HD, hexadecane. (e) Apparatus with the four-component mixture above the membrane. Inset, larger quantity of feed in a glass vial, depicting the presence of different phases. (f) Water-rich permeate passes through the membrane whereas hexadecane-rich retentate is retained. Water is dyed blue, hexadecane and rapeseed oil are dyed red. Scale bars, 2 cm.
