Mechanical properties of chemically-treated carbon nanotube nanocomposite microfibers

Experimental and modeling studies

H. Moussaddy, R. D. Farahani, Brahim Aissa, M. A. El Khakani, M. Lévesque, D. Therriault

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We experimentally and theoretically investigated the mechanical properties of single-walled carbon nanotube (SWCNT)/epoxy nanocomposite microfibers, fabricated using the direct-write technique. The SWCNTs were functionalized by acidic oxidation during the SWCNT purification process. The nanocomposite suspensions were prepared using an efficient mixing method which involves the simultaneous heating and ultrasonicating of the nanocomposite solution diluted in acetone, followed by solvent evaporation and high shear mixing. Morphological characterization revealed that the SWCNTs and their aggregates with a size of up to ∼1.3 μm were fairly-well dispersed in the epoxy matrix. The mechanical characterization of the nanocomposite microfibers showed that, with only 0.5wt% loading of purified SWCNTs, the modulus and strength of the nanocomposite were improved by 33% and 27%, respectively. The overall effective stiffness of the nanocomposites was also estimated using micromechanical homogenization. Perfect bonding condition between carbon nanotubes and the epoxy matrix was assumed. The SWCNTs were assumed to be straight cylinders having an aspect ratio of 500. Since it is very difficult to control and experimentally determine SWCNTs orientation in the matrix, several orientation distributions were studied for comparison purposes: fully aligned, partially aligned and randomly oriented. The results were obtained for individually dispersed SWCNTs as well as dispersed SWCNT bundles featuring lower aspect ratios (25 to 100). Our experimental measured stiffness were found to be lower than the theoretical estimates for fully aligned SWCNTs or bundles of SWCNTs. However, the measured stiffness remains higher than randomly dispersed bundles of SWCNTS. These results suggest a partial alignment of the carbon nanotubes in the manufactured nanocomposites. The experimental stiffness was found to match with the theoretical results of different configurations of SWCNTs in the nanocomposite. All results are based on a perfect bonding assumption between straight SWCNTs and matrix. If imperfect bonding and/or SWCNT waviness are to be considered, the calculated alignment would be even better. This alignment achieved in the microfiber manufacturing process along with their chemical treatment and efficient mixing processes proposed help achieve full load transfer across SWCNT/epoxy interface, resulting in a considerable reinforcement of nanocomposite microfibers.

Original languageEnglish
Title of host publication2nd Joint US-Canada Conference on Composites - American Society for Composites, 26th Annual Technical Conference: Canadian Association for Composite Structures and Materials
Publication statusPublished - 2011
Externally publishedYes
Event2nd Joint US-Canada Conference on Composites - American Society for Composites, 26th Annual Technical Conference: Canadian Association for Composite Structures and Materials - Montreal, QC
Duration: 26 Sep 201128 Sep 2011

Other

Other2nd Joint US-Canada Conference on Composites - American Society for Composites, 26th Annual Technical Conference: Canadian Association for Composite Structures and Materials
CityMontreal, QC
Period26/9/1128/9/11

Fingerprint

Carbon Nanotubes
Carbon nanotubes
Nanocomposites
Mechanical properties
Single-walled carbon nanotubes (SWCN)
Stiffness
Aspect ratio
Acetone
Purification
Suspensions
Reinforcement
Evaporation
Heating
Oxidation

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials
  • Ceramics and Composites

Cite this

Moussaddy, H., Farahani, R. D., Aissa, B., El Khakani, M. A., Lévesque, M., & Therriault, D. (2011). Mechanical properties of chemically-treated carbon nanotube nanocomposite microfibers: Experimental and modeling studies. In 2nd Joint US-Canada Conference on Composites - American Society for Composites, 26th Annual Technical Conference: Canadian Association for Composite Structures and Materials

Mechanical properties of chemically-treated carbon nanotube nanocomposite microfibers : Experimental and modeling studies. / Moussaddy, H.; Farahani, R. D.; Aissa, Brahim; El Khakani, M. A.; Lévesque, M.; Therriault, D.

2nd Joint US-Canada Conference on Composites - American Society for Composites, 26th Annual Technical Conference: Canadian Association for Composite Structures and Materials. 2011.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Moussaddy, H, Farahani, RD, Aissa, B, El Khakani, MA, Lévesque, M & Therriault, D 2011, Mechanical properties of chemically-treated carbon nanotube nanocomposite microfibers: Experimental and modeling studies. in 2nd Joint US-Canada Conference on Composites - American Society for Composites, 26th Annual Technical Conference: Canadian Association for Composite Structures and Materials. 2nd Joint US-Canada Conference on Composites - American Society for Composites, 26th Annual Technical Conference: Canadian Association for Composite Structures and Materials, Montreal, QC, 26/9/11.
Moussaddy H, Farahani RD, Aissa B, El Khakani MA, Lévesque M, Therriault D. Mechanical properties of chemically-treated carbon nanotube nanocomposite microfibers: Experimental and modeling studies. In 2nd Joint US-Canada Conference on Composites - American Society for Composites, 26th Annual Technical Conference: Canadian Association for Composite Structures and Materials. 2011
Moussaddy, H. ; Farahani, R. D. ; Aissa, Brahim ; El Khakani, M. A. ; Lévesque, M. ; Therriault, D. / Mechanical properties of chemically-treated carbon nanotube nanocomposite microfibers : Experimental and modeling studies. 2nd Joint US-Canada Conference on Composites - American Society for Composites, 26th Annual Technical Conference: Canadian Association for Composite Structures and Materials. 2011.
@inproceedings{27811dec259644bcb200466195eccb27,
title = "Mechanical properties of chemically-treated carbon nanotube nanocomposite microfibers: Experimental and modeling studies",
abstract = "We experimentally and theoretically investigated the mechanical properties of single-walled carbon nanotube (SWCNT)/epoxy nanocomposite microfibers, fabricated using the direct-write technique. The SWCNTs were functionalized by acidic oxidation during the SWCNT purification process. The nanocomposite suspensions were prepared using an efficient mixing method which involves the simultaneous heating and ultrasonicating of the nanocomposite solution diluted in acetone, followed by solvent evaporation and high shear mixing. Morphological characterization revealed that the SWCNTs and their aggregates with a size of up to ∼1.3 μm were fairly-well dispersed in the epoxy matrix. The mechanical characterization of the nanocomposite microfibers showed that, with only 0.5wt{\%} loading of purified SWCNTs, the modulus and strength of the nanocomposite were improved by 33{\%} and 27{\%}, respectively. The overall effective stiffness of the nanocomposites was also estimated using micromechanical homogenization. Perfect bonding condition between carbon nanotubes and the epoxy matrix was assumed. The SWCNTs were assumed to be straight cylinders having an aspect ratio of 500. Since it is very difficult to control and experimentally determine SWCNTs orientation in the matrix, several orientation distributions were studied for comparison purposes: fully aligned, partially aligned and randomly oriented. The results were obtained for individually dispersed SWCNTs as well as dispersed SWCNT bundles featuring lower aspect ratios (25 to 100). Our experimental measured stiffness were found to be lower than the theoretical estimates for fully aligned SWCNTs or bundles of SWCNTs. However, the measured stiffness remains higher than randomly dispersed bundles of SWCNTS. These results suggest a partial alignment of the carbon nanotubes in the manufactured nanocomposites. The experimental stiffness was found to match with the theoretical results of different configurations of SWCNTs in the nanocomposite. All results are based on a perfect bonding assumption between straight SWCNTs and matrix. If imperfect bonding and/or SWCNT waviness are to be considered, the calculated alignment would be even better. This alignment achieved in the microfiber manufacturing process along with their chemical treatment and efficient mixing processes proposed help achieve full load transfer across SWCNT/epoxy interface, resulting in a considerable reinforcement of nanocomposite microfibers.",
author = "H. Moussaddy and Farahani, {R. D.} and Brahim Aissa and {El Khakani}, {M. A.} and M. L{\'e}vesque and D. Therriault",
year = "2011",
language = "English",
booktitle = "2nd Joint US-Canada Conference on Composites - American Society for Composites, 26th Annual Technical Conference: Canadian Association for Composite Structures and Materials",

}

TY - GEN

T1 - Mechanical properties of chemically-treated carbon nanotube nanocomposite microfibers

T2 - Experimental and modeling studies

AU - Moussaddy, H.

AU - Farahani, R. D.

AU - Aissa, Brahim

AU - El Khakani, M. A.

AU - Lévesque, M.

AU - Therriault, D.

PY - 2011

Y1 - 2011

N2 - We experimentally and theoretically investigated the mechanical properties of single-walled carbon nanotube (SWCNT)/epoxy nanocomposite microfibers, fabricated using the direct-write technique. The SWCNTs were functionalized by acidic oxidation during the SWCNT purification process. The nanocomposite suspensions were prepared using an efficient mixing method which involves the simultaneous heating and ultrasonicating of the nanocomposite solution diluted in acetone, followed by solvent evaporation and high shear mixing. Morphological characterization revealed that the SWCNTs and their aggregates with a size of up to ∼1.3 μm were fairly-well dispersed in the epoxy matrix. The mechanical characterization of the nanocomposite microfibers showed that, with only 0.5wt% loading of purified SWCNTs, the modulus and strength of the nanocomposite were improved by 33% and 27%, respectively. The overall effective stiffness of the nanocomposites was also estimated using micromechanical homogenization. Perfect bonding condition between carbon nanotubes and the epoxy matrix was assumed. The SWCNTs were assumed to be straight cylinders having an aspect ratio of 500. Since it is very difficult to control and experimentally determine SWCNTs orientation in the matrix, several orientation distributions were studied for comparison purposes: fully aligned, partially aligned and randomly oriented. The results were obtained for individually dispersed SWCNTs as well as dispersed SWCNT bundles featuring lower aspect ratios (25 to 100). Our experimental measured stiffness were found to be lower than the theoretical estimates for fully aligned SWCNTs or bundles of SWCNTs. However, the measured stiffness remains higher than randomly dispersed bundles of SWCNTS. These results suggest a partial alignment of the carbon nanotubes in the manufactured nanocomposites. The experimental stiffness was found to match with the theoretical results of different configurations of SWCNTs in the nanocomposite. All results are based on a perfect bonding assumption between straight SWCNTs and matrix. If imperfect bonding and/or SWCNT waviness are to be considered, the calculated alignment would be even better. This alignment achieved in the microfiber manufacturing process along with their chemical treatment and efficient mixing processes proposed help achieve full load transfer across SWCNT/epoxy interface, resulting in a considerable reinforcement of nanocomposite microfibers.

AB - We experimentally and theoretically investigated the mechanical properties of single-walled carbon nanotube (SWCNT)/epoxy nanocomposite microfibers, fabricated using the direct-write technique. The SWCNTs were functionalized by acidic oxidation during the SWCNT purification process. The nanocomposite suspensions were prepared using an efficient mixing method which involves the simultaneous heating and ultrasonicating of the nanocomposite solution diluted in acetone, followed by solvent evaporation and high shear mixing. Morphological characterization revealed that the SWCNTs and their aggregates with a size of up to ∼1.3 μm were fairly-well dispersed in the epoxy matrix. The mechanical characterization of the nanocomposite microfibers showed that, with only 0.5wt% loading of purified SWCNTs, the modulus and strength of the nanocomposite were improved by 33% and 27%, respectively. The overall effective stiffness of the nanocomposites was also estimated using micromechanical homogenization. Perfect bonding condition between carbon nanotubes and the epoxy matrix was assumed. The SWCNTs were assumed to be straight cylinders having an aspect ratio of 500. Since it is very difficult to control and experimentally determine SWCNTs orientation in the matrix, several orientation distributions were studied for comparison purposes: fully aligned, partially aligned and randomly oriented. The results were obtained for individually dispersed SWCNTs as well as dispersed SWCNT bundles featuring lower aspect ratios (25 to 100). Our experimental measured stiffness were found to be lower than the theoretical estimates for fully aligned SWCNTs or bundles of SWCNTs. However, the measured stiffness remains higher than randomly dispersed bundles of SWCNTS. These results suggest a partial alignment of the carbon nanotubes in the manufactured nanocomposites. The experimental stiffness was found to match with the theoretical results of different configurations of SWCNTs in the nanocomposite. All results are based on a perfect bonding assumption between straight SWCNTs and matrix. If imperfect bonding and/or SWCNT waviness are to be considered, the calculated alignment would be even better. This alignment achieved in the microfiber manufacturing process along with their chemical treatment and efficient mixing processes proposed help achieve full load transfer across SWCNT/epoxy interface, resulting in a considerable reinforcement of nanocomposite microfibers.

UR - http://www.scopus.com/inward/record.url?scp=84866685756&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84866685756&partnerID=8YFLogxK

M3 - Conference contribution

BT - 2nd Joint US-Canada Conference on Composites - American Society for Composites, 26th Annual Technical Conference: Canadian Association for Composite Structures and Materials

ER -