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. 2019 Nov 1;5(11):eaax0380. doi: 10.1126/sciadv.aax0380

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Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 1 — (A) Reversible wettability transition from superhydrophilic to superhydrophobic, enabled by the orientation change of the dodecyl sulfate ions. (B) SLIPS 1 is formed by infusing water into the superhydrophilic porous membrane (process I), which can repel oil. After rinsing with ethanol (process II), SLIPS 1 turns superhydrophobic. (C) Oil is infused into the superhydrophobic porous membrane (process III), forming SLIPS 2. Water will be repelled by SLIPS 2. The lubricating oil will be released from SLIPS 2 under an electrical potential (process IV), giving rise to a superhydrophilic porous membrane.