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Nature has no replacement for the electronegativity of the fluorine atom.

It seems like there are many usable substances which are hydrophobic (usable as a water repellent). Not so many alternatives which are oleophobic (oil repellent).

I am sure proper research is being conducted to find replacements.

https://iopscience.iop.org/article/10.1088/1742-6596/1904/1/...

There are oleophobic alternatives, but nothing durable. Durability is proportional to the chemical bond strength.

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