Superhydrophobic And Superoleophilic “Sponge-Like” Aerogels For Oil/Water Separation

Abstract

We report a facile approach to synthesize superhydrophobic and superoleophilic “sponge-like” aerogels through sol–gel reaction followed by supercritical drying, in which MTES and DMDES are used as co-precursors, EtOH as a solvent, CTAB as a surfactant, and HCl and NH3·H2O as catalysts. The MTES–DMDES-based aerogels formed at the optimal molar ratio of MTES: DMDES: EtOH: H2O: HCl: NH3·H2O: CTAB at 1.1: 0.9: 6: 12: 2 × 10−3: 2 × 10−3: 0.14 with a low density of 0.0897 g/cm3 show a compression ratio of 80 % under 36.85 kPa stress. They are superhydrophobic and superoleophilic with a water contact angle of 153.6° and an oil contact angle of 0°. We find that the MTES–DMDES-based aerogels show the high adsorption capacity for various kinds of organic liquids and the excellent recyclability in removing oil from water.

Publication Date

8-26-2015

Publication Title

Journal of Materials Science

Volume

50

Issue

15

Number of Pages

5115-5124

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s10853-015-9034-9

Socpus ID

84929838202 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84929838202

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