Production of hierarchical all graphitic structures: A systematic study.
We report the production of hierarchical all graphitic structures through a systematic study involving the use of wet chemical treatments for dip coating of carbon fibers (CFs) for surface grafting with multiwalled carbon nanotubes (CNTs). Realization of a thin homogeneous veil of CNTs onto the CF surface was achieved through an extensive parametric survey. Optimization of aqueous dispersions of CNTs eliminated the need for oxidation of the CF surface. The effects of chemical processes onto the surface and structural characteristics of the involved graphitic species were evaluated via thermogravimetric analysis, and X-ray photoelectron, infrared and Raman spectroscopies. The dielectric properties of the produced CNT aqueous dispersions were monitored via electrochemical impedance spectroscopy. A final assessment of the produced hierarchical CFs was performed through scanning electron microscopy.
Department of Materials Science & Engineering, University of Ioannina, GR-45110 Ioannina, Greece.
Kyriaki
K
Tsirka
Department of Materials Science & Engineering, University of Ioannina, GR-45110 Ioannina, Greece.
Georgios
G
Foteinidis
Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", 15341 Ag. Paraskevi Attikis, Athens, Greece; Department of Materials Science & Engineering, University of Ioannina, GR-45110 Ioannina, Greece.
Konstantinos
K
Dimos
Department of Materials Science & Engineering, University of Ioannina, GR-45110 Ioannina, Greece.
Lazaros
L
Tzounis
Department of Materials Science & Engineering, University of Ioannina, GR-45110 Ioannina, Greece.
Dimitrios
D
Gournis
Department of Materials Science & Engineering, University of Ioannina, GR-45110 Ioannina, Greece. Electronic address: paipetis@cc.uoi.gr.
Alkiviadis S
AS
Paipetis
Carbon fibers; Carbon nanotubes; EIS; FTIR; Hierarchical composites; Raman; SEM; TGA; Wet chemical treatment; XPS