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López-Moreno A, Nieto-Ortega B, Moffa M, et al. Threading through Macrocycles Enhances the Performance of Carbon Nanotubes as Polymer Fillers. ACS Nano. 2016;10(8):8012-8doi: 10.1021/acsnano.6b04028.
López-Moreno, A., Nieto-Ortega, B., Moffa, M., de Juan, A., Bernal, M. M., Fernández-Blázquez, J. P., Vilatela, J. J., Pisignano, D., & Pérez, E. M. (2016). Threading through Macrocycles Enhances the Performance of Carbon Nanotubes as Polymer Fillers. ACS nano, 10(8), 8012-8. https://doi.org/10.1021/acsnano.6b04028
López-Moreno, Alejandro, et al. "Threading through Macrocycles Enhances the Performance of Carbon Nanotubes as Polymer Fillers." ACS nano vol. 10,8 (2016): 8012-8. doi: https://doi.org/10.1021/acsnano.6b04028
López-Moreno A, Nieto-Ortega B, Moffa M, de Juan A, Bernal MM, Fernández-Blázquez JP, Vilatela JJ, Pisignano D, Pérez EM. Threading through Macrocycles Enhances the Performance of Carbon Nanotubes as Polymer Fillers. ACS Nano. 2016 Aug 23;10(8):8012-8. doi: 10.1021/acsnano.6b04028. Epub 2016 Jul 29. PMID: 27454946; PMCID: PMC4997533.
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ACS Nano. 2016 Aug 23;10(8):8012-8. doi: 10.1021/acsnano.6b04028. Epub 2016 Jul 29.

Threading through Macrocycles Enhances the Performance of Carbon Nanotubes as Polymer Fillers.

ACS nano

Alejandro López-Moreno, Belén Nieto-Ortega, Maria Moffa, Alberto de Juan, M Mar Bernal, Juan P Fernández-Blázquez, Juan J Vilatela, Dario Pisignano, Emilio M Pérez

Affiliations

  1. IMDEA Nanoscience, Ciudad Universitaria de Cantoblanco , C/Faraday 9, 28049 Madrid, Spain.
  2. Istituto Nanoscienze-CNR, Euromediterranean Center of Nanomaterial Modelling and Technology (ECMT) , via Arnesano, 73100 Lecce, Italy.
  3. IMDEA Materials, Eric Kandel 2, Getafe, 28005 Madrid, Spain.
  4. Dipartimento di Matematica e Fisica "Ennio De Giorgi", Università del Salento , via Arnesano, 73100 Lecce, Italy.

PMID: 27454946 PMCID: PMC4997533 DOI: 10.1021/acsnano.6b04028

Abstract

In this work, we study the reinforcement of polymers by mechanically interlocked derivatives of single-walled carbon nanotubes (SWNTs). We compare the mechanical properties of fibers made of polymers and of composites with pristine SWNTs, mechanically interlocked derivatives of SWNTs (MINTs), and the corresponding supramolecular models. Improvements of both Young's modulus and tensile strength of up to 200% were observed for the polystyrene-MINT samples with an optimized loading of just 0.01 wt %, while the supramolecular models with identical chemical composition and loading showed negligible or even detrimental influence. This behavior is found for three different types of SWNTs and two types of macrocycles. Molecular dynamics simulations show that the polymer adopts an elongated conformation parallel to the SWNT when interacting with MINT fillers, irrespective of the macrocycle chemical nature, whereas a more globular structure is taken upon facing with either pristine SWNTs or supramolecular models. The MINT composite architecture thus leads to a more efficient exploitation of the axial properties of the SWNTs and of the polymer chain at the interface, in agreement with experimental results. Our findings demonstrate that the mechanical bond imparts distinctive advantageous properties to SWNT derivatives as polymer fillers.

Keywords: electrospinning; mechanical properties; nanotubes; polymers; rotaxanes

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