A Simple Method to Prepare a Bioinspired Fog Collection System Combined with Wettability Patterns and Slippery Liquid Infused Porous Surfaces

Freshwater shortage is a growing problem, and inspired by the ultrafast directional water transport structure of the Sarracenia trichomes and the excellent lubrication effect of SLIPS, bionic hierarchical structured surfaces with wettability patterns were prepared based on laser processing combined with dip and oil-infused modification. The prepared surfaces were tested for sliding performance, water impact, corrosion resistance, and fog collection, and the relationships between the surface structure, wettability, sliding properties, and droplet directional condensation, coalescence, absorption, and directional water transport, as well as their influences on the fog collection performance, were investigated by analyzing the fog collection process. In addition, the optimization direction of surfaces with wettability patterns to alleviate water collection obstacles and improve fog collection efficiency is given. The method offers simplicity and high fog collection efficiency. This study provides a good reference for the development and preparation of fog collection surfaces.