Lubricant-infused microano-structured surfaces with tunable dynamic omniphobicity at high temperatures

摘要

Omniphobic surfaces that can repel fluids at temperatures higher than 100 are rare. Most state-of-the-art liquid-repellent materials are based on the lotus effect, where a thin air layer is maintained throughout microanotextures leading to high mobility of liquids. However, such behavior eventually fails at elevated temperatures when the surface tension of test liquids decreases significantly. Here, we demonstrate a class of lubricant-infused structured surfaces that can maintain a robust omniphobic state even for low-surface-tension liquids at temperatures up to at least 200 ℃. We also demonstrate how liquid mobility on such surfaces can be tuned by a factor of 1000.