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Type: Artigo
Title: Synthesis Of Ultralow Density 3d Graphene-cnt Foams Using A Two-step Method
Author: Vinod
Soumya; Tiwary
Chandra Sekhar; Machado
Leonardo D.; Ozden
Sehmus; Vajtai
Robert; Galvao
Douglas S.; Ajayan
Pulickel M.
Abstract: Here, we report a highly scalable two-step method to produce graphene foams with ordered carbon nanotube reinforcements. In our approach, we first used solution assembly methods to obtain graphene oxide foam. Next, we employed chemical vapor deposition to simultaneously grow carbon nanotubes and thermally reduce the 3D graphene oxide scaffold. The resulting structure presented increased stiffness, good mechanical stability and oil absorption properties. Molecular dynamics simulations were carried out to further elucidate failure mechanisms and to understand the enhancement of the mechanical properties. The simulations showed that mechanical failure is directly associated with bending of vertical reinforcements, and that, for similar length and contact area, much more stress is required to bend the corresponding reinforcements of carbon nanotubes, thus explaining the experimentally observed enhanced mechanical properties.
Subject: Carbon Nanotube
Graphite Oxide
Editor: Royal Soc Chemistry
Citation: Nanoscale. Royal Soc Chemistry, v. 8, p. 15857 - 15863, 2016.
Rights: fechado
Identifier DOI: 10.1039/c6nr04252j
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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