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The mechanical and electrical properties of direct-spun carbon nanotube mats

Stallard, J.C.; Tan, W.; Smail, F.R.; Gspann, Thurid; Boies, A.M.; Fleck, N.A.

Abstract:
The mechanical and electrical properties of a direct-spun carbon nanotube mat are measured. The mat comprises an interlinked random network of nanotube bundles, with approximately 40 nanotubes in a bundle. A small degree of in-plane anisotropy is observed. The bundles occasionally branch, and the mesh topology resembles a 2D lattice of nodal connectivity slightly below 4. The macroscopic in-plane tensile response is elasto-plastic in nature, with significant orientation hardening. In-situ microscopy reveals that the nanotube bundles do not slide past each other at their junctions under macroscopic strain. A micromechanical model is developed to relate the macroscopic modulus and flow strength to the longitudinal shear response of the nanotube bundles. The mechanical and electrical properties of the mat are compared with those of other nanotube arrangements over a wide range of density.

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Verlagsausgabe §
DOI: 10.5445/IR/1000122463
Veröffentlicht am 07.08.2020
Originalveröffentlichung
DOI: 10.1016/j.eml.2018.03.003
Scopus
Zitationen: 22
Web of Science
Zitationen: 20
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 05.2018
Sprache Englisch
Identifikator ISSN: 2352-4316
KITopen-ID: 1000122463
Erschienen in Extreme mechanics letters
Verlag Elsevier
Band 21
Seiten 65–75
Schlagwörter Carbon nanotube mat; Mechanical properties; In-situ testing; Nanotube bundles
Nachgewiesen in Web of Science
Scopus
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