Research progress in the field of oil droplet transport based on underwater superoleophobic surface

This review focuses on underwater superoleophobic surfaces used for oil droplets transportation. Firstly, an overview of the wetting theory of underwater superoleophobic surfaces is discussed. After that, the surface pattern properties of flat-chemically heterogeneous surfaces are presented from the perspective of microscopic roughness structures, and the specific applications of underwater superoleophobic surfaces based on hierarchical structural design is given. Attempting to reveal the hydrophobic effect of micromorphology (re-entrant curvature affect) on surface structure, to guide the modeling of underwater superhydrophobic surfaces. Then, the driving mechanism of oil droplet transport is also summarized, and the underwater superoleophobic surfaces with special wettability are introduced, focusing on achieving different functions of oil droplet transportation. Finally, a summary and outlook were made on the progress of underwater superoleophobic surfaces in the field of oil droplet transport.