Superamphiphobic surfaces have drawn much research attention in recent years. Whereas, the fabrication of these surfaces is still a major challenge. Successful attempts to prepare superamphiphobic surfaces include introducing special microstructures, such as nanofilaments, overhang structures, and re-entrant surface curvatures. But the fabrication of those structures relies on complicated process control. As an alternative, the use of fluorinated polymers and inorganic nanoparticles to form hierarchically structured coatings was demonstrated to be a more straightforward way towards superamphiphobicity. However, the nanoparticles used in this method are mainly synthetic ones. Considering the undesirable energy consumption and harmful environment pollution during the nanoparticle synthesis process, the use of naturally occurring nanomaterials is expected to be more advantageous. In this research, we report a superamphiphobic surface based on halloysite clay nanotubes (HNTs). Owing to the needle like morphology of individual HNT, the agglomerates could form pincushion structure with connected air pockets. Therefore, HNTs can be potentially used for the fabrication of superamphiphobic coatings. To achieve low surface free energy, a copolymer of 2-(perfluorooctyl)ethylacrylate and dopamine acrylate was synthesized to modify HNTs surface. Upon dropping on substrates, the surface modified HNTs formed a hierarchically structured surface with an excellent superamphiphobicity.

Superamphiphobic coating based on halloysite clay nanotubes and a catechol bearing fluorinated polymer

248th National Meeting (2014)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.