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Three-dimensional micro structured nanocomposite beams by microfluidic infiltration

Louis Laberge Lebel, Brahim Aïssa, O. A. Paez, My Ali El Khakani and Daniel Therriault

Article (2009)

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Three-dimensional (3D) micro structured beams reinforced with a single-walled carbon nanotube (C-SWNT)/polymer nanocomposite were fabricated using an approach based on the infiltration of 3D microfluidic networks. The 3D microfluidic network was first fabricated by the direct-write assembly method, which consists of the robotized deposition of fugitive ink filaments on an epoxy substrate, forming thereby a 3D micro structured scaffold. After encapsulating the 3D micro-scaffold structure with an epoxy resin, the fugitive ink was liquefied and removed, resulting in a 3D network of interconnected microchannels. This microfluidic network was then infiltrated by a polymer loaded with C-SWNTs and subsequently cured. Prior to their incorporation in the polymer matrix, the UV-laser synthesized C-SWNTs were purified, functionalized and dispersed into the matrix using a three-roll mixing mill. The final samples consist of rectangular beams having a complex 3D skeleton structure of C-SWNT/polymer nanocomposite fibers, adapted to offer better performance under flexural solicitation. Dynamic mechanical analysis in flexion showed an increase of 12.5% in the storage modulus compared to the resin infiltrated beams. The nanocomposite infiltration of microfluidic networks demonstrated here opens new prospects for the achievement of 3D reinforced micro structures.

Subjects: 2000 Materials science and technology > 2002 Materials processing/fabrication
2100 Mechanical engineering > 2100 Mechanical engineering
Department: Department of Mechanical Engineering
Research Center: CREPEC - Center for Applied Research on Polymers and Composites
Funders: Fonds Québécois de la Recherche sur la Nature et les Technologies, CRSNG/NSERC
PolyPublie URL: https://publications.polymtl.ca/10374/
Journal Title: Journal of Micromechanics and Microengineering (vol. 19, no. 12)
Publisher: Institute Of Physics Publishing
DOI: 10.1088/0960-1317/19/12/125009
Official URL: https://doi.org/10.1088/0960-1317/19/12/125009
Date Deposited: 04 Jul 2022 14:18
Last Modified: 05 Apr 2024 15:18
Cite in APA 7: Laberge Lebel, L., Aïssa, B., Paez, O. A., El Khakani, M. A., & Therriault, D. (2009). Three-dimensional micro structured nanocomposite beams by microfluidic infiltration. Journal of Micromechanics and Microengineering, 19(12), 125009. https://doi.org/10.1088/0960-1317/19/12/125009


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