In this work, we report the mechanical and electrical properties of carbon nanotubes/epoxy composites prepared with aligned and randomly oriented nanotubes as filler. The samples are disks of 30 mm in diameter and 3 mm in thickness. To obtain the carbon nanotubes alignment, an external electric field (250 VAC; 50 Hz) was applied through the thickness of the sample during all the cure process. The AC electrical current was measured, during the cure, as a strategy to determine the optimum time in which the alignment reaches the maximum value. DC conductivity measured after the cure shows a percolation threshold in the filler content one order of magnitude smaller for composites with aligned nanotubes than for composites with randomly oriented filler (from 0.06 to 0.5 wt%). In the percolation threshold, the achieved conductivity was 1.4×10 -5 Sm -1. In both cases, aligned and randomly distributed carbon nanotube composites, the wear resistance increases with the addition of the filler while the Rockwell hardness decreases independently of the nanotubes alignment. © 2011 Elsevier B.V. All rights reserved.
| Documento: | Artículo |
| Título: | Influence of filler alignment in the mechanical and electrical properties of carbon nanotubes/epoxy nanocomposites |
| Autor: | Felisberto, M.; Arias-Durán, A.; Ramos, J.A.; Mondragon, I.; Candal, R.; Goyanes, S.; Rubiolo, G.H. |
| Filiación: | LPyMC, FCEyN-UBA, Pab i Ciudad Universitaria, Buenos Aires 1428, Argentina INQUIMAE-CONICET-UBA, Pab II Ciudad Universitaria, Buenos Aires 1428, Argentina Dep. Ingenieria Química y M. Ambiente. Esc. Politécnica, UPV/EHU, Pza. Europa 1, Donostia-San Sebastian 20018, Spain Escuela de Ciencia y Tecnologia-UNSAM, San Martin, Prov. De Buenos Aires, Argentina Dep. Materiales, Comisión Nacional de Energía Atómica (CNEA-CAC), Avda Gral Paz 1499, B1650KNA San Martín, Argentina |
| Palabras clave: | Carbon nanotubes; Electrical properties; Epoxy nanocomposites; Mechanical properties; Aligned nanotubes; Carbon-nanotube composites; Cure process; Dc conductivity; Electrical current; Epoxy nanocomposites; External electric field; Filler contents; Maximum values; Mechanical and electrical properties; Percolation thresholds; Randomly distributed; Resistance increase; Rockwell hardness; Alignment; Carbon; Carbon nanotubes; Curing; Fillers; Mechanical properties; Nanocomposites; Percolation (computer storage); Percolation (fluids); Percolation (solid state); Electric properties |
| Año: | 2012 |
| Volumen: | 407 |
| Número: | 16 |
| Página de inicio: | 3181 |
| Página de fin: | 3183 |
| DOI: | http://dx.doi.org/10.1016/j.physb.2011.12.059 |
| Título revista: | Physica B: Condensed Matter |
| Título revista abreviado: | Phys B Condens Matter |
| ISSN: | 09214526 |
| CODEN: | PHYBE |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214526_v407_n16_p3181_Felisberto |
