Fluoropolymer/SiO2 composite films with switchable superoleophilicity and high oleophobicity for “on-off” oil permeation

- Switchable superoleophilicity and high oleophobicity surfaces were prepared.
- The tunable wettability was realized by reversing the feeding order of the perfluorinated monomer.
- Distribution of low surface energy groups played a key role in determining surface oleophobicity.
- The switchable surfaces can be used to control over oil permeation without any stimulation.