Influence of different carbon nanotubes on the electrical and mechanical properties of melt mixed poly(ether sulfone)-multi walled carbon nanotube composites

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Sourav Chakraborty - , Leibniz-Institut für Polymerforschung Dresden, Indian Institute of Technology Kharagpur (Autor:in)
  • Juergen Pionteck - , Leibniz-Institut für Polymerforschung Dresden (Autor:in)
  • Beate Krause - , Leibniz-Institut für Polymerforschung Dresden (Autor:in)
  • Susanta Banerjee - , Indian Institute of Technology Kharagpur (Autor:in)
  • Brigitte Voit - , Professur für Organische Chemie der Polymere (gB/IPF) (MTC3), Leibniz-Institut für Polymerforschung Dresden (Autor:in)

Abstract

Commercial Udel (R) poly(ether sulfone) (PSU) was filled with three different commercially available multiwalled carbon nanotubes (MWCNTs) by small scale melt mixing. The MWCNTs were as grown NC 7000 and two of its derivatives prepared by ball milling treatment. One of them was unmodified (NC 3150); the other was amino modified (NC 3152). The main difference beside the reactivity was the reduced aspect ratio of NC 3150 and NC 3152 caused by ball milling process. All PSU/MWCNT composites with similar filler content were prepared under fixed processing conditions and comparative analysis of their electrical and mechanical properties were performed and were correlated with their microstructure, characterized by optical microscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). A non-uniform MWCNT dispersion was observed in all composites. The MWCNTs were present in form of agglomerates in the size of 10-60 mu m whereas the deagglomerated part was homogeneously distributed in the PSU matrix. The differences in the agglomeration states correlate with the variations of properties between different PSU/MWCNT composites. The lowest electrical percolation threshold of 0.25-0.5 wt.% was observed for the shortened non-functionalized MWCNT composites and the highest for amine-modified MWCNT composites (ca. 1.5 wt.%). The tensile behavior of the three composites was only slightly altered with CNT loading as compared to the pure PSU. However, the elongation at break showed a reduction with MWCNT loading and the reduction was least for composite with best MWCNT dispersion. (C) 2012 Elsevier Ltd. All rights reserved.

Details

OriginalspracheEnglisch
Seiten (von - bis)1933-1940
Seitenumfang8
FachzeitschriftComposites Science and Technology
Jahrgang72
Ausgabenummer15
PublikationsstatusVeröffentlicht - 12 Okt. 2012
Peer-Review-StatusJa

Externe IDs

Scopus 84867317047
WOS 000310943000020
ORCID /0000-0002-4531-691X/work/148607580

Schlagworte

Schlagwörter

  • Carbon nanotubes, Electrical properties, Optical microscopy, Poly(ether sulfone), Polymer-matrix composites (PMCs)