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Roll-off effect

Nanostructured surfaces can also be found in nature: the leaves of certain plants and insect wings remain clean because soil and water cannot stick to their surfaces.

During the "roll-off effect", the force of attraction between surfaces and water droplets is reduced. Tiny "spikes" on the surface prevent a water droplet from penetrating the underlying material. It rolls off the tips which are very small compared to the water droplet.

[Nanotechnology][Roll-off effect][Leather care]
  • Soil and water simply roll off
  • In nature some plant leaves and insect wings utilise this effect
  • In leather care the roll-off effect provides for an up to 25-30 per cent improved waterproofing effect

Thanks to the roll-off effect, water cannot penetrate plant leaves.