Louis Laberge Lebel, Brahim Aïssa, My Ali El Khakani and Daniel Therriault
Article (2010)
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Abstract
We report on the preparation of nanocomposites consisting of laser synthesized single-walled carbon nanotubes (C-SWNTs) reinforcing a polyurethane. Prior to their incorporation into the polymer matrix, the C-SWNTs were purified, and characterized by means of various techniques. The purification in nitric acid added carboxylic groups to the C-SWNTs. A procedure to properly disperse the nanomaterials in the polymer was developed involving high shear mixing using a three-roll mill and a non-covalent functionalization of the nanotubes by zinc protoporphyrin IX molecule. The incorporation of the C-SWNTs into the resin led to an increase of the viscosity and the apparition of a slight shear-thinning behavior. A further increase of the shear-thinning behavior using fumed silica particles enabled the direct-write fabrication of microbeams. Mechanical characterization revealed significant increase in both strength (by ∼64%) and modulus (by more than 15 times). These mechanical enhancements are believed to be a consequence of the successful covalent and the non-covalent functionalizations of the nanotubes.
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Subjects: |
2000 Materials science and technology > 2001 Materials structure, properties and testing 2000 Materials science and technology > 2002 Materials processing/fabrication |
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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/10379/ |
Journal Title: | Composites Science and Technology (vol. 70, no. 3) |
Publisher: | Elsevier |
DOI: | 10.1016/j.compscitech.2009.12.004 |
Official URL: | https://doi.org/10.1016/j.compscitech.2009.12.004 |
Date Deposited: | 06 Jul 2022 14:30 |
Last Modified: | 08 Apr 2025 10:32 |
Cite in APA 7: | Laberge Lebel, L., Aïssa, B., El Khakani, M. A., & Therriault, D. (2010). Preparation and mechanical characterization of laser ablated single-walled carbon-nanotubes/polyurethane nanocomposite microbeams. Composites Science and Technology, 70(3), 518-524. https://doi.org/10.1016/j.compscitech.2009.12.004 |
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