| 초록 |
A polymer thin film, consisting of a hydrophilic reservoir of chitosan/carboxymethyl cellulose suitably capped with various hydrophobic layers, was designed to control water condensation. Layer-by-layer assembly methods were used to construct the conformal coatings; detailed morphological and wettability characterization was accomplished using a combination of quartz crystal microbalance experiments, depth-profiling X-ray photoelectron spectroscopy, and measurements of contact angles. The successful performance of the coatings relies on their zwitter-wettable character, defined as the simultaneous capability to resist wetting by water in the condensed liquid state, while remaining highly hydrophilic to molecular water that diffuses rapidly into the film from the vapor phase. These mechanistic concepts and the quantitative morphological characterizations enabled us to design zwitter-wettable films with significantly enhanced antifog and even frost-resistant behavior. |
