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Reinforcing epoxy nanocomposites with functionalized carbon nanotubes via biotin–streptavidin interactions

Rouhollah Dermanaki Farahani, Hamid Dalir, Vincent Le Borgne, Loick A. Gautier, My Ali El Khakani, Martin Lévesque, Daniel Therriault

Article (2012)

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Abstract

We report on the preparation of nanocomposites consisting of biofunctionalized single-walled carbon nanotubes (BF-SWCNTs) reinforcing an ultraviolet curable epoxy polymer by means of biotin–streptavidin interactions. The as-produced laser ablation SWCNTs are biofunctionalized via acid oxidization based purification process and non-covalent functionalization using surfactant, followed by grafting the resulting nanotubes with biomolecules. The biotin-grafted nanotubes are capable of interacting with epoxy groups in presence of streptavidin molecules by which chemical bridges between BF-SWCNTs and epoxy matrix are formed. The biomolecules grafted to the nanotubes surface not only facilitate the load transfer, but also improve the nanotube dispersion into the epoxy matrix, as observed by optical imaging and scanning electron microscopy. Mechanical characterization on the nanocomposite microfibers demonstrates considerable enhancement in both strength (by 76%) and modulus (by 93%) with the addition of only 1 wt.% of BF-SWCNTs. The electrical measurements reveal a clear change in electrical conductivity of nanocomposite microfibers reinforced with 1 wt.% of BF-SWCNTs in comparison to the microfibers containing solely purified carbon nanotubes. These multifunctional nanocomposite materials could be used to fabricate macro and microstructures for a wide variety of applications such as high strength polymer nanocomposite and potential easily-manipulated biosensors.

Uncontrolled Keywords

A. Carbon nanotube; A. Nanocomposites; B. Surface treatments; UV-assisted direct-write

Subjects: 1700 Design and manufacturing > 1702 Advanced manufacturing
2000 Materials science and technology > 2007 Composites
2100 Mechanical engineering > 2100 Mechanical engineering
Department: Department of Mechanical Engineering
Research Center: CREPEC - Center for Applied Research on Polymers and Composites
LM2 - Laboratory for Multi-scale Mechanics
Funders: FQRNT (Le Fonds Québécois de la 18 Recherche sur la Nature et les Technologies), CRSNG/NSERC, Plasma-20 Québec (le Réseau Stratégique du FQRNT sur la Science et Technologies des Plasmas)
PolyPublie URL: https://publications.polymtl.ca/10401/
Journal Title: Composites Science and Technology (vol. 72, no. 12)
Publisher: Elsevier
DOI: 10.1016/j.compscitech.2012.05.010
Official URL: https://doi.org/10.1016/j.compscitech.2012.05.010
Date Deposited: 26 Jul 2022 12:31
Last Modified: 18 Nov 2022 08:21
Cite in APA 7: Farahani, R. D., Dalir, H., Le Borgne, V., Gautier, L. A., El Khakani, M. A., Lévesque, M., & Therriault, D. (2012). Reinforcing epoxy nanocomposites with functionalized carbon nanotubes via biotin–streptavidin interactions. Composites Science and Technology, 72(12), 1387-1395. https://doi.org/10.1016/j.compscitech.2012.05.010

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