Lignin-based polyurethane doped with carbon nanotubes for sensor applications

被引:40
|
作者
Faria, Fernando A. C. [2 ]
Evtuguin, Dmitry V. [1 ,2 ]
Rudnitskaya, Alisa [2 ,3 ]
Gomes, Maria T. S. R. [2 ,3 ]
Oliveira, Joao A. B. P. [2 ,3 ]
Graca, M. Pedro F. [4 ,5 ]
Costa, Luis C. [4 ,5 ]
机构
[1] Univ Aveiro, CICECO, P-3810193 Aveiro, Portugal
[2] Univ Aveiro, Dept Chem, P-3810193 Aveiro, Portugal
[3] Univ Aveiro, CESAM, P-3810193 Aveiro, Portugal
[4] Univ Aveiro, I3N, P-3810193 Aveiro, Portugal
[5] Univ Aveiro, Dept Phys, P-3810193 Aveiro, Portugal
关键词
kraft lignin; polyurethane; carbon nanotubes; nanocomposites; chemical sensors;
D O I
10.1002/pi.4140
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
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
引用
收藏
页码:788 / 794
页数:7
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