Highly fluorinated nanostructured polymer foams for producing super-repellent surfaces

A highly fluorinated nanostructured polymer foam with a density of at most 2.2 g/mL, an absolute foam expansion of at least 1% as well as a free surface energy of at most 12 mN/m, wherein the fluorine content is at least 20 mol % and wherein cavities with dimensions of at most 5 pm are homogeneously distributed throughout the entire volume of the polymer foam.