An easy synthetic way to exfoliate and stabilize MWCNTs in a thermoplastic pyrrole-containing matrix assisted by hydrogen bonds

R. Araya-Hermosilla, A. Pucci, E. Araya-Hermosilla, P. P. Pescarmona, P. Raffa, L. M. Polgar, I. Moreno-Villoslada, M. Flores, G. Fortunato, A. A. Broekhuis, F. Picchioni*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

This work focuses on the design of an engineered thermoplastic polymer containing pyrrole units in the main chain and hydroxyl pendant groups (A-PPy-OH), which help in achieving nanocomposites containing well-distributed, exfoliated and undamaged MWCNTs. The thermal annealing at 100 °C of the pristine nanocomposite promotes the redistribution of the nanotubes in terms of a percolative network, thus converting the insulating material in a conducting soft matrix (60 μΩ m). This network remains unaltered after cooling to r.t. and successive heating cycles up to 100 °C thanks to the effective stabilization of MWCNTs provided by the functional polymer matrix. Notably, the resistivity-temperature profile is very reproducible and with a negative temperature coefficient of -0.002 K-1, which suggests the potential application of the composite as a temperature sensor. Overall, the industrial scale by which A-PPy-OH can be produced offers a straightforward alternative for the scale-up production of suitable polymers to generate multifunctional nanocomposites.

Original languageEnglish
Pages (from-to)85829-85837
Number of pages9
JournalRSC Advances
Volume6
Issue number89
DOIs
Publication statusPublished - 2016

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