One-step fabrication of fluoropolymer transparent films with superhydrophobicity by dry method

Abstract

Fluoropolymer transparent thin films were deposited on different substrates by one-step vacuum evaporation method, which exhibit superhydrophobic property with water contact angle (CA) greater than 150°. Polytetrafluoroethylene (PTFE) film with network structure shows high oleophobicity with oil CA of 138°, whereas polytetrafluoroethylene-perfluoropropylvinylethers (PFA) film with particle structure is superoleophilicity with oil CA near 0°. It is believed that different conformation of -CF2- groups at the surface lead to this different surface activity. © 2010 Wiley Periodicals, Inc.