Microwave-assisted, quick and reversible wettability control of 3D porous graphene networks
발표자
()
초록
내용
3D graphene foams (3D GFs) have been applied in many research areas due to their high electrical conductivity with activated ionic diffusion. For their practical applications, optimizing the wettability of the 3D GFs is necessary; despite many studies to date, tuning the polarity of the surface is still time-consuming with multiple complicated processes, limiting its use to 2D graphene sheets only. We present a simple and rapid method of hydrophilic-to-hydrophobic transition for 3D GFs by microwave-mediated solvent treatments. As the 3D GFs are pre-coated with polar or non-polar solvents, their superhydrophilic or superhydrophobic properties are chemically determined with ultra-short microwave radiations. The dramatic transition can be repeated many times due to chemisorption and desorption of functional groups with microwave-assisted plasma and Joule heating.