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

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)1387-1395
Number of pages9
JournalComposites Science and Technology
Issue number12
StatePublished - Jul 23 2012


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

ASJC Scopus subject areas

  • Ceramics and Composites
  • General Engineering


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