Manufacturing composite beams reinforced with three-dimensionally patterned-oriented carbon nanotubes through microfluidic infiltration

Rouhollah D. Farahani, Maryam Pahlavanpour, Hamid Dalir, Brahim Aissa, My Ali El Khakani, Martin Lévesque, Daniel Therriault

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Functionalized single-walled carbon nanotubes (SWCNTs)/epoxy nanocomposite suspensions were prepared and injected into three-dimensional (3D) interconnected microfluidic networks in order to fabricate composite beams reinforced with patterned-oriented nanotubes. The microfluidic networks were fabricated by the robotized direct deposition of fugitive ink filaments in a layer-by-layer sequence onto substrates, followed by their epoxy encapsulation and the ink removal. Then, the nanocomposite suspensions prepared by ultrasonication and three-roll mill mixing methods were injected into the empty networks under two different controlled and constant pressures in order to subject the suspensions to different shear conditions in the microchannels. Morphological studies revealed that the SWCNTs were preferentially aligned in the microchannels along the flow direction at the higher injection pressure. The improvement of Young's modulus of the manufactured 3D-reinforced rectangular beams prepared at the high injection pressure was almost doubled when compared to that of beams prepared at the low injection pressure. Finally, the stiffness of the 3D-reinforced beams was compared with the theoretically predicted values obtained from a micromechanical model. The analytical predictions give a close estimation of the stiffness at different micro-injection conditions. Based on the experimental and theoretical results, the present manufacturing technique enables the spatial orientation of nanotube in the final product by taking advantage of shear flow combined with dimensional constraining inside the microfluidic channels.

Original languageEnglish
Pages (from-to)214-225
Number of pages12
JournalMaterials and Design
Volume41
DOIs
Publication statusPublished - Oct 2012
Externally publishedYes

Fingerprint

Carbon Nanotubes
Infiltration
Microfluidics
Carbon nanotubes
infiltration
manufacturing
Suspensions
Composite materials
Single-walled carbon nanotubes (SWCN)
Microchannels
Ink
Nanotubes
stiffness
Nanocomposites
Stiffness
encapsulation
shear flow
Young modulus
Shear flow
Encapsulation

Keywords

  • Carbon nanotubes
  • Homogenization
  • Mechanical properties
  • Nanocomposite
  • Orientation
  • Three-dimensional reinforcement

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

Manufacturing composite beams reinforced with three-dimensionally patterned-oriented carbon nanotubes through microfluidic infiltration. / Farahani, Rouhollah D.; Pahlavanpour, Maryam; Dalir, Hamid; Aissa, Brahim; Khakani, My Ali El; Lévesque, Martin; Therriault, Daniel.

In: Materials and Design, Vol. 41, 10.2012, p. 214-225.

Research output: Contribution to journalArticle

Farahani, Rouhollah D. ; Pahlavanpour, Maryam ; Dalir, Hamid ; Aissa, Brahim ; Khakani, My Ali El ; Lévesque, Martin ; Therriault, Daniel. / Manufacturing composite beams reinforced with three-dimensionally patterned-oriented carbon nanotubes through microfluidic infiltration. In: Materials and Design. 2012 ; Vol. 41. pp. 214-225.
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