LIQUID-REPELLENT SURFACES MADE OF ANY MATERIALS

摘要

An artificial surface is disclosed where super-repellency is obtained solely from surface roughness regardless of the material's intrinsic wettability. The surface is able to repel all known liquids. The surface contains thereon a plurality of microstructures having a doubly re-entrant topology and a liquid-solid contact fraction of less than 50%. In one embodiment, the doubly re-entrant topology includes a cap portion and downwardly extending lip extending from the periphery of the cap portion. The surface withstands high temperatures and resists surface changing phenomenon such as biofouling and chemical scaling.

主权项

1. A liquid-repellent artificial surface comprising:
a surface containing thereon a plurality of microstructures separated by a pitch of less than 500 μm and having a doubly re-entrant topology situated atop respective base structures and a liquid-solid contact fraction (fs) of less than 50%, wherein the doubly re-entrant topology comprises a cap portion and downwardly extending lip extending from a periphery of the cap portion.