what makes something hydrophobic?

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what makes something hydrophobic?

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Adding to this, some hydrophobic surface have structure that reduces the surface contact with the water droplet. A bit like a Fakir bed of nail for instance (but microscopic), because of the surface tension when water droplet doesn’t go between the nails. So it just glides away because it’s actually barely touching anything.

However, if I’m not mistaken, the most important point is the “non polar surface” as described before.
No matter what you do, if your surface actually attracts water it will simply stick to it.

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