Lignin-based polyurethane doped with carbon nanotubes for sensor applications

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abstract

Modified eucalyptus kraft lignin doped with multiwall carbon nanotubes (MWCNTs) was used as a macromonomer in step-growth polymerization with tolylene 2,4-diisocyanate terminated poly(propylene glycol) with the aim of producing a conductive copolymer for all-solid-state potentiometric chemical sensor applications. The crosslinked elastomeric polyurethane obtained was characterized by Fourier transform infrared attenuated total reflection spectroscopy, scanning electron microscopy, tunnelling electron microscopy and atomic force microscopy. Doping of lignin-based polyurethane with MWCNTs produced a significant enhancement of its electrical conductivity without deterioration of thermal and viscoelastic properties. The polymer composite displayed a low percolation threshold at an MWCNT concentration of 0.18% (w/w), which was explained by the oriented distribution of MWCNTs along lignin clusters. All lignin-based polyurethanes doped with MWCNTs at concentrations above the percolation threshold are suitable for sensor applications. Copyright (c) 2012 Society of Chemical Industry

keywords

KRAFT LIGNIN; COMPOSITES; METALS

subject category

Polymer Science

authors

Faria, FAC; Evtuguin, DV; Rudnitskaya, A; Gomes, MTSR; Oliveira, JABP; Graca, MPF; Costa, LC

our authors

foto Dmitry Evtyugin

Dmitry Evtyugin

Associate Professor with Aggregation

Groups

G4 - Renewable Materials and Circular Economy

acknowledgements

We gratefully acknowledge CICECO and CESAM Associated Research Laboratories (University of Aveiro, Portugal) and the Portuguese Science and Technology Foundation, through the European Social Fund (ESF) and

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Publication Details

type
Journal Article
year
2012
journal
POLYMER INTERNATIONAL
volume
61
publisher
WILEY-BLACKWELL
issn
0959-8103
issue
5
digital object identifier
10.1002/pi.4140
web of science article identifier
WOS:000302541200017

Journal Metrics (JCR 2019)

Journal Impact Factor
2.574
Journal Impact Factor (5 yrs)
2.314
category normalized journal percentile
66.854

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