We all know that certain plants and animals are naturally water repellent. If you spatter a drop of water on the leaf of a gabi plant (taro), you will see that the water forms itself into a compact globule that easily slides off the leaf. The gabi leaf is naturally water repellent, water rolls easily off this surface or just bounces back open impact.
The natural water repellency that certain plants and animals exhibits are now the subject of extreme study by scientists. Taking their inspiration from nature, science is now developing synthetic coatings with super hydrophobic abilities.
You would think that a water repellent material would have to be as smooth as possible to slough off water. But it turns out that the opposite is true. For a material to exhibit super hydrophobic qualities, it must have a microscopically rough surface. The rough surface prevent the water from flattening, so it forms into beads that roll off; the beads often carry dirt with them
The natural water repellency that certain plants and animals exhibits are now the subject of extreme study by scientists. Taking their inspiration from nature, science is now developing synthetic coatings with super hydrophobic abilities.
You would think that a water repellent material would have to be as smooth as possible to slough off water. But it turns out that the opposite is true. For a material to exhibit super hydrophobic qualities, it must have a microscopically rough surface. The rough surface prevent the water from flattening, so it forms into beads that roll off; the beads often carry dirt with them
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