Issue 20, 2024

Bio-inspired sustained entrainment in immiscible liquid–liquid systems for collecting floating oil

Abstract

Entrainment, where a solid object in a liquid bath moves towards the air phase, is common in industry and daily-life. However, most research on liquid entrainment has only focused on air–liquid interfaces, with little attention given to oil–water systems. Here, we look at a specific scenario where a solid object is immersed downwards from the upper oil phase to the lower water one. We demonstrate a biomimetic object, learned from bumble bees' tongues, with mesoscale structures that can keep the oil film and protect itself from the adhesion of water. By screening structure parameters, we find that the oil film can be sustained by both the propping effect of the structure and the flow and shape evolution. Heating the structure can recover the oil for effective recycling. This approach has the potential for oil spill cleanup by drilling oil spill film by using an unmanned aerial vehicle (UAV).

Graphical abstract: Bio-inspired sustained entrainment in immiscible liquid–liquid systems for collecting floating oil

Supplementary files

Article information

Article type
Communication
Submitted
02 janv. 2024
Accepted
14 févr. 2024
First published
16 févr. 2024

J. Mater. Chem. A, 2024,12, 11821-11830

Bio-inspired sustained entrainment in immiscible liquid–liquid systems for collecting floating oil

Z. Cheng, T. Shen, S. Chen, C. Yu, P. Li, Q. Tian, C. Li, L. Jiang and Z. Dong, J. Mater. Chem. A, 2024, 12, 11821 DOI: 10.1039/D4TA00025K

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