Low-density three-dimensional foam using self-reinforced hybrid two-dimensional atomic layers

Soumya Vinod, Chandra Sekhar Tiwary, Pedro Alves da Silva Autreto, Jaime Taha-Tijerina, Sehmus Ozden, Alin Cristian Chipara, Robert Vajtai, Douglas S. Galvao, Tharangattu N. Narayanan () and Pulickel M. Ajayan ()
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Soumya Vinod: Rice University
Chandra Sekhar Tiwary: Rice University
Pedro Alves da Silva Autreto: Rice University
Jaime Taha-Tijerina: Rice University
Sehmus Ozden: Rice University
Alin Cristian Chipara: Rice University
Robert Vajtai: Rice University
Douglas S. Galvao: Instituto de Física 'Gleb Wataghin', Universidade Estadual de Campinas
Tharangattu N. Narayanan: CSIR-Central Electrochemical Research Institute (CSIR-CECRI)
Pulickel M. Ajayan: Rice University

Nature Communications, 2014, vol. 5, issue 1, 1-9

Abstract: Abstract Low-density nanostructured foams are often limited in applications due to their low mechanical and thermal stabilities. Here we report an approach of building the structural units of three-dimensional (3D) foams using hybrid two-dimensional (2D) atomic layers made of stacked graphene oxide layers reinforced with conformal hexagonal boron nitride (h-BN) platelets. The ultra-low density (1/400 times density of graphite) 3D porous structures are scalably synthesized using solution processing method. A layered 3D foam structure forms due to presence of h-BN and significant improvements in the mechanical properties are observed for the hybrid foam structures, over a range of temperatures, compared with pristine graphene oxide or reduced graphene oxide foams. It is found that domains of h-BN layers on the graphene oxide framework help to reinforce the 2D structural units, providing the observed improvement in mechanical integrity of the 3D foam structure.

Date: 2014
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DOI: 10.1038/ncomms5541

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