New surface materials that are extremely difficult to wet both by water and oil have now been developed by scientists. Because they don’t need isolating air to stay trapped between the droplet and rough surface to prevent wetting, these surface materials work even when wet by another liquid. Researchers’ novel dual superlyophobic surfaces repel water even when covered by oil and oil when covered by water. So far, this has been regarded as contradictory to each other and not expected to be present on the same surface.
from Engineering and Construction News – ScienceDaily https://www.sciencedaily.com/releases/2016/10/161028111700.htm
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