The toughness mechanisms of epoxy-based nanocomposites reinforced by double-walled carbon nanotubes (DWCNT) are investigated using Raman microscopy mapping. Maps of the residual strain of the carbon nanotubes were generated for the fracture surfaces obtained after tensile loading. By imaging through different microscope objectives, Raman mapping allowed to determine the distribution of the nanotube residual strain, indicating tension or compression, in different sampling volumes near the fracture surface. The G′ band with its high sensitivity to nanotube diameter variations, and not overlapping with the characteristic epoxy Raman lines, was selected for the mapping. Results provide a quantitative analysis of the nanotube bridging and pull-out mechanisms identified by scanning electron microscopy (SEM) inspection of the fracture surfaces.

Mapping the residual strain of carbon nanotubes in DWCNT/epoxy nanocomposites after tensile load using Raman microscopy / Laurenzi, Susanna.; Botti, Sabina; Rufoloni, Alessandro; Santonicola, Mariagabriella. - In: COMPOSITES COMMUNICATIONS. - ISSN 2452-2139. - 21:(2020), pp. 1-5. [10.1016/j.coco.2020.100424]

Mapping the residual strain of carbon nanotubes in DWCNT/epoxy nanocomposites after tensile load using Raman microscopy

Laurenzi Susanna.
;
Santonicola MariaGabriella
2020

Abstract

The toughness mechanisms of epoxy-based nanocomposites reinforced by double-walled carbon nanotubes (DWCNT) are investigated using Raman microscopy mapping. Maps of the residual strain of the carbon nanotubes were generated for the fracture surfaces obtained after tensile loading. By imaging through different microscope objectives, Raman mapping allowed to determine the distribution of the nanotube residual strain, indicating tension or compression, in different sampling volumes near the fracture surface. The G′ band with its high sensitivity to nanotube diameter variations, and not overlapping with the characteristic epoxy Raman lines, was selected for the mapping. Results provide a quantitative analysis of the nanotube bridging and pull-out mechanisms identified by scanning electron microscopy (SEM) inspection of the fracture surfaces.
2020
bridging; double-walled carbon nanotube; fracture toughness; nanocomposites; pull-out; Raman microscopy
01 Pubblicazione su rivista::01a Articolo in rivista
Mapping the residual strain of carbon nanotubes in DWCNT/epoxy nanocomposites after tensile load using Raman microscopy / Laurenzi, Susanna.; Botti, Sabina; Rufoloni, Alessandro; Santonicola, Mariagabriella. - In: COMPOSITES COMMUNICATIONS. - ISSN 2452-2139. - 21:(2020), pp. 1-5. [10.1016/j.coco.2020.100424]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1435402
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