Water is a fundamental element on Earth, in fact it occupies about 71% of the Earth's surface for this reason it is reasonable to study its properties and the resulting applications. At the same time, it is fundamental to analyze the way other materials behave in relation to water itself. Particularly useful and interesting is trying to understand the way in which water and solid surfaces interact, without forgetting the interactions between water and air. In this context, particular interest was aroused by those materials that show a self-cleaning behavior. This behavior allows to introduce the concept of hydrophilic and hydrophobic material: a material is defined hydrophobic or hydrophilic according to its ability to absorb or retain water inside or on its surface .