Fig. 6. (a) Superhydrophobic behaviour in both EM-SF-4 and EM-SF-40 aerogels, (b) and (c) show the surface wettability of the EMT-10-SF-4 and EMT-10-SF-40, respectively, with water, vegetable oil, methanol and acetone and the respective water contact angles, (d) photographs show the selective absorption of vegetable oil by the EM-SF-40 aerogel due to its superhydrophobicity and superoleophilicity. Note: the Petri dish is oleophilic.