Shape memory polymer surface with tunable microstructure and adhesion

A low adhesive superhydrophobic surface with shape memory microstructures was prepared by the template method. It was found that under the external pressure, the surface would lose the superhydrophobicity for the destroyed microstructures, and meanwhile, the surface became high adhesive. After heating the surface at 120℃, both surface microstructures and the low adhesive superhydrophobicity can be recovered. The results indicate that the adhesive property can be controlled reversibly by controlling the surface microstructures. Different microstructures results in different wetting states, as a result, the surface shows different adhsions. On the original surface, water droplet resides in the low adhesive Cassie state, while on the crushed surface, the droplet resides in the high adhesive Wenzel state.