3D Printed Fluorine-Free Omniphobic Surfaces

Omniphobic surfaces have attracted tremendous interest due to their wide range of applications. The fabrication of omniphobic surfaces typically requires the use of per- and polyfluoroalkyl substances, which pose adverse effects on the environment. Prior work has elucidated the critical role of doubly reentrant texture in achieving fluorine-free omniphobic surfaces. However, current methods for creating doubly reentrant texture involve complex and/or time-consuming processes. In this work, we demonstrate rapid fabrication of fluorine-free omniphobic surfaces possessing doubly reentrant texture using Digital Light Processing (DLP) 3D printing. Liquid droplets with a wide range of surface tensions display high contact angles on the 3D printed omniphobic surfaces.