Figure 3: Batch separation of oil-in-water and water-in-oil emulsions.
From: Hygro-responsive membranes for effective oil–water separation
(a) Separation apparatus with a 50:50 v:v hexadecane-in-water emulsion above the membrane. Inset, hexadecane droplet on a surface spin-coated with a 20 wt% fluorodecyl POSS+x-PEGDA blend, submerged in water containing dissolved SDS (1 mg ml−1). (b) Water-rich permeate passes through the membrane whereas hexadecane-rich retentate is retained. (c) TGA data for the permeates and the retentates. HD, hexadecane. (d) Apparatus with a 30:70 v:v water-in-hexadecane emulsion above the membrane. Inset, hexadecane droplet on a surface spin coated with a 20 wt% fluorodecyl POSS+x-PEGDA blend, submerged in water containing dissolved PS80 (1 mg ml−1). (e) Water-rich permeate passes through the membrane whereas hexadecane-rich retentate is retained. Water is dyed blue and hexadecane is dyed red. Scale bars, 2 cm.
