Journal
ACS NANO
Volume 6, Issue 11, Pages 10178-10185Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn303917p
Keywords
functional graphenes; nanopapers; mechanical properties; electrical conductivity; X-ray
Categories
Funding
- Div Of Engineering Education and Centers
- Directorate For Engineering [914790] Funding Source: National Science Foundation
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High-performance graphene nanopapers are prepared from an aqueous solution of functional graphenes with benzenesulfonic acid groups via covalent bonds. The formed hydrophobic graphene nanopapers showed the highest tensile strength of 360 MPa and Young's modulus of 102 GPa for samples with 13.7 wt % functional group and annealed at 150 degrees C. These samples showed a high electrical conductivity of 4.45 x 10(4) S/m after being annealed at 250 degrees C. The aforementioned properties of graphene nanopapers are much higher than any previously reported data. The properties of nanopapers depend on the degree of functionality on graphenes and the annealing temperatures, which are further evidenced by X-ray photoelectron spectroscopy, FTIR, and X-ray diffraction patterns. Such unique nanopapers can be easily bounded and sandwiched onto any solid surface to give rise to great potentials in many applications such as gas diffusion barriers, EMI shielding, thermal management, and anticorrosion.
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