Wong, William S. Y.Stachurski, Zbigniew H.Nisbet, David R.Tricoli, Antonio2016-09-012016-09-011944-8244http://hdl.handle.net/1885/107972In nature, durable self-cleaning surfaces such as the Lotus leaf rely on the multiscale architecture and cohesive regenerative properties of organic tissue. Real-world impact of synthetic replicas has been limited by the poor mechanical and chemical stability of the ultrafine hierarchical textures required for attaining a highly dewetting superhydrophobic state. Here, we present the low-cost synthesis of large-scale ultradurable superhydrophobic coatings by rapid template-free micronano texturing of interpenetrated polymer networks (IPNs). A highly transparent texture of soft yielding marshmallow-like pillars with an ultralow surface energy is obtained by sequential spraying of a novel polyurethane-acrylic colloidal suspension and a superhydrophobic nanoparticle solution. The resulting coatings demonstrate outstanding antiabrasion resistance, maintaining superhydrophobic water contact angles and a pristine lotus effect with sliding angles of below 10° for up to 120 continuous abrasion cycles. Furthermore, they also have excellent chemical- and photostability, preserving the initial performance upon more than 50 h exposure to intense UVC light (254 nm, 3.3 mW cm(-2)), 24 h of oil contamination, and highly acidic conditions (1 M HCl). This sprayable polyurethane-acrylic colloidal suspension and surface texture provide a rapid and low-cost approach for the substrate-independent fabrication of ultradurable transparent self-cleaning surfaces with superior abrasion, chemical, and UV-resistance.This work was partially supported by an ARC Discovery Project (DP150101939). W.S.Y.W. acknowledges the Ph.D. research fellowship from the Australian National University. D.R.N. was supported by a NHMRC Career Development Fellowship (APP1050684).© 2016 American Chemical Societyrobust hierarchical nanostructuresself-cleaningsprayable interpenetrated polymer networkultra-durableultrahydrophobic2016-06-0110.1021/acsami.6b03414