The Effect of Hexamethylene Diisocyanate-Modified Graphene Oxide as a Nanofiller Material on the Properties of Conductive Polyaniline
Authors
Luceño Sánchez, José Antonio; Díez Pascual, Ana María; Peña Capilla, Rafael; García Díaz, María del PilarPublisher
MDPI
Date
2019-06-11Bibliographic citation
Sánchez, J.A.L. et al. (2019) ‘The effect of hexamethylene diisocyanate-modified graphene oxide as a nanofiller material on the properties of conductive polyaniline’, Polymers, 11(6), p. 1032. doi:10.3390/polym11061032.
Keywords
PANI
Graphene oxide
Hexamethylene diisocyanate
Nanocomposite
Thermal stability
Mechanical properties
Document type
info:eu-repo/semantics/article
Publisher's version
https://www.mdpi.com/2073-4360/11/6/1032Rights
© 2019 by the authors
Atribución 4.0 Internacional
Access rights
info:eu-repo/semantics/openAccess
Abstract
Conducting polymers like polyaniline (PANI) have gained a lot of interest due to their
outstanding electrical and optoelectronic properties combined with their low cost and easy synthesis.
To further exploit the performance of PANI, carbon-based nanomaterials like graphene, graphene
oxide (GO) and their derivatives can be incorporated in a PANI matrix. In this study, hexamethylene
diisocyanate-modified GO (HDI-GO) nanosheets with two di erent functionalization degrees have
been used as nanofillers to develop high-performance PANI/HDI-GO nanocomposites via in situ
polymerization of aniline in the presence of HDI-GO followed by ultrasonication and solution casting.
The influence of the HDI-GO concentration and functionalization degree on the nanocomposite
properties has been examined by scanning electron microscopy (SEM), Raman spectroscopy, X-ray
di raction (XRD), thermogravimetric analysis (TGA), tensile tests, zeta potential and four-point probe
measurements. SEM analysis demonstrated a homogenous dispersion of the HDI-GO nanosheets that
were coated by the matrix particles during the in situ polymerization. Raman spectra revealed the
existence of very strong PANI-HDI-GO interactions via - stacking, H-bonding, and hydrophobic
and electrostatic charge-transfer complexes. A steady enhancement in thermal stability and electrical
conductivity was found with increasing nanofiller concentration, the improvements being higher with
increasing HDI-GO functionalization level. The nanocomposites showed a very good combination
of rigidity, strength, ductility and toughness, and the best equilibrium of properties was attained at
5 wt % HDI-GO. The method developed herein opens up a versatile route to prepare multifunctional
graphene-based nanocomposites with conductive polymers for a broad range of applications including
flexible electronics and organic solar cells.
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effect_lueno_POLYMERS_2019.pdf | 3.686Mb |
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