Fabrication of Superhydrophobic Surfaces with Controllable Adhesion Force via Pre-Loaded Pressure

A facile hybrid method of superhydrophobic surface fabrication with different water adhesion based on assisted pressure is here reported. With assisted pressure, water droplet on the prepared samples can transform from Cassie state to Wenzel state, which means the water adhesion force have been changed from low to high. Same volume of water droplet was manipulated onto different samples respectively to test their water adhesion force, all droplets have experienced “touching, being pressed, leaving” three processes. Three samples with different water adhesion were selected and used to transfer water droplet from low water adhesion sample to high water adhesion sample with no residue. This finding aids our understanding of the adhesion force with extra pressure, and opens up a new way to put water adhesion control into practice.