Influence of filler alignment in the mechanical and electrical properties of carbon nanotubes/epoxy nanocomposites
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 fiel...
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2012
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paper:paper_09214526_v407_n16_p3181_Felisberto2023-06-08T15:50:38Z Influence of filler alignment in the mechanical and electrical properties of carbon nanotubes/epoxy nanocomposites Candal, Roberto Jorge Goyanes, Silvia Nair 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 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. Fil:Candal, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Goyanes, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214526_v407_n16_p3181_Felisberto http://hdl.handle.net/20.500.12110/paper_09214526_v407_n16_p3181_Felisberto |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Candal, Roberto Jorge Goyanes, Silvia Nair Influence of filler alignment in the mechanical and electrical properties of carbon nanotubes/epoxy nanocomposites |
| topic_facet |
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 |
| description |
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. |
| author |
Candal, Roberto Jorge Goyanes, Silvia Nair |
| author_facet |
Candal, Roberto Jorge Goyanes, Silvia Nair |
| author_sort |
Candal, Roberto Jorge |
| title |
Influence of filler alignment in the mechanical and electrical properties of carbon nanotubes/epoxy nanocomposites |
| title_short |
Influence of filler alignment in the mechanical and electrical properties of carbon nanotubes/epoxy nanocomposites |
| title_full |
Influence of filler alignment in the mechanical and electrical properties of carbon nanotubes/epoxy nanocomposites |
| title_fullStr |
Influence of filler alignment in the mechanical and electrical properties of carbon nanotubes/epoxy nanocomposites |
| title_full_unstemmed |
Influence of filler alignment in the mechanical and electrical properties of carbon nanotubes/epoxy nanocomposites |
| title_sort |
influence of filler alignment in the mechanical and electrical properties of carbon nanotubes/epoxy nanocomposites |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214526_v407_n16_p3181_Felisberto http://hdl.handle.net/20.500.12110/paper_09214526_v407_n16_p3181_Felisberto |
| work_keys_str_mv |
AT candalrobertojorge influenceoffilleralignmentinthemechanicalandelectricalpropertiesofcarbonnanotubesepoxynanocomposites AT goyanessilvianair influenceoffilleralignmentinthemechanicalandelectricalpropertiesofcarbonnanotubesepoxynanocomposites |
| _version_ |
1768543283130138624 |