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Effect of carbon nanotube length on the piezoresistive response of poly (methyl methacrylate) nanocomposites

  • Centro de Investigacion Cientifica de Yucatan
    ,
  • Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional
    ,
  • Universidad Anáhuac Mayab
Research Output: Contribution to journal Article Peer review

Publication Information

Tipo di output

Research Output: Contribution to journal Article Peer review

Lingua originale

English

Pagine da-a (Numero di pagine)

Pagine 394-402 (9 pagine)

Rivista (volume, numero edizione)

European Polymer Journal (Volume 110)

Attività cardine della pubblicazione

  • Published - 01/01/2019

Stato pubblicazione

Published - 01/01/2019

ISSN

0014-3057

Publication IDs

  • Scopus: 85057729873

Abstract

Multiwall carbon nanotubes (MWCNTs) were systematically fragmented using high density ultrasonic energy and used as fillers of a poly (methyl methacrylate) matrix (PMMA). MWCNT fragmentation was confirmed by scanning electron microscopy and atomic force microscopy. Dedicated MWCNT length measurements yielded a log-normal statistical distribution, with mean value of 1.33 μm for the as-received MWCNTs and 0.66 μm for the fragmented MWCNTs. Higher electrical percolation threshold and lower electrical conductivity were obtained for MWCNT/PMMA composites (0.01–1 wt.% MWCNT concentration) using the fragmented MWCNTs. Higher electro-mechanical (piezoresistive) sensitivity under tensile tests was measured for PMMA nanocomposites with fragmented MWCNTs, which was explained by a competition of mechanisms related to the MWCNT length.

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