Constructing advanced nanomaterials with pre-designed organized morphologies from low-dimension components is attractive for assembling hierarchical materials, but extremely challenging because of complex inter-component interactions, high-aspect ratios, flexible geometrical shapes, crumpling instability under compression and limited common processing window for synthetic and biological components.  Herein, we report an efficient and universal amphiphilicity-driven assembly strategy to construct “hairy” flexible hybrid (bio-synthetic) nanosheets with the net of 1D cellulose nanofibers conformally wrapped around 2D graphene oxide (GO) monolayers.  This interface-driven 1D-2D assembly is facilitated by tunable amphiphilic interfacial interactions via tailoring the surface chemistry of GO nanosheets as controllably pre-oxidized template cores, resulting in individual sheets tightly wrapped by dense nanocellulose network. These nanocellulose-wrapped GO nanosheets demonstrate recorded-breaking compressive elastic modulus due to the strong bonding between nanofibers and GO sheets.  This unique stability well exceeds the compressive limits of individual components, nanocellulose fiber networks and graphene nanocomposites.  Additionally, the presence of reinforced nanocellulose net significantly enhances the wetting ability of hydrophobic reduced GO nanosheets, enabling the long-term stable rGO dispersion and allowing fast water transport combined with high separation efficiency.<br/>

Hairy graphenes: Wrapping nanocellulose nets around graphene oxide sheets

2019 Spring National Meeting

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