TY - JOUR
T1 - Graphene aerogel/epoxy composites with exceptional anisotropic structure and properties
AU - Wang, Zhenyu
AU - Shen, Xi
AU - Akbari Garakani, Mohammad
AU - Lin, Xiuyi
AU - Wu, Ying
AU - Liu, Xu
AU - Sun, Xinying
AU - Kim, Jang Kyo
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/3/11
Y1 - 2015/3/11
N2 - 3D interconnected graphene aerogels (GAs) are prepared through one-step chemical reduction and rational assembly of graphene oxide (GO) sheets, so that the difficulties to uniformly disperse the individual graphene sheets in the polymer matrixes are avoided. Apart from ultralow density, high porosity, high electrical conductivity, and excellent compressibility, the resulting GAs possess a cellular architecture with a high degree of alignment when the graphene content is above a threshold, ∼0.5 wt %. The composites prepared by infiltrating GA with epoxy resin present excellent electrical conductivities, together with high mechanical properties and fracture toughness. The unusual anisotropic structure gives rise to ∼67% and ∼113% higher electrical conductivity and fracture toughness of the composites, respectively, in the alignment direction than that transverse to it.
AB - 3D interconnected graphene aerogels (GAs) are prepared through one-step chemical reduction and rational assembly of graphene oxide (GO) sheets, so that the difficulties to uniformly disperse the individual graphene sheets in the polymer matrixes are avoided. Apart from ultralow density, high porosity, high electrical conductivity, and excellent compressibility, the resulting GAs possess a cellular architecture with a high degree of alignment when the graphene content is above a threshold, ∼0.5 wt %. The composites prepared by infiltrating GA with epoxy resin present excellent electrical conductivities, together with high mechanical properties and fracture toughness. The unusual anisotropic structure gives rise to ∼67% and ∼113% higher electrical conductivity and fracture toughness of the composites, respectively, in the alignment direction than that transverse to it.
KW - anisotropic properties
KW - graphene aerogel
KW - nanocomposite
KW - reduced graphene oxide
UR - http://www.scopus.com/inward/record.url?scp=84924599437&partnerID=8YFLogxK
U2 - 10.1021/acsami.5b00146
DO - 10.1021/acsami.5b00146
M3 - Journal article
AN - SCOPUS:84924599437
SN - 1944-8244
VL - 7
SP - 5538
EP - 5549
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 9
ER -