Thermally Switchable Electrically Conductive Thermoset rGO/PK Self-Healing Composites

Esteban Araya-Hermosilla, Alice Giannetti, Guilherme de Macedo R. Lima, Felipe Orozco , Francesco Picchioni, Virgilio Mattoli, Ranjita K. Bose*, Andrea Pucci*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
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Abstract

Among smart materials, self-healing is one of the most studied properties. A self-healing polymer can repair the cracks that occurred in the structure of the material. Polyketones, which are high-performance thermoplastic polymers, are a suitable material for a self-healing mechanism: a furanic pendant moiety can be introduced into the backbone and used as a diene for a temperature reversible Diels-Alder reaction with bismaleimide. The Diels-Alder adduct is formed at around 50 °C and broken at about 120 °C, giving an intrinsic, stimuli-responsive self-healing material triggered by temperature variations. Also, reduced graphene oxide (rGO) is added to the polymer matrix (1.6–7 wt%), giving a reversible OFF-ON electrically conductive polymer network. Remarkably, the electrical conductivity is activated when reaching temperatures higher than 100 °C, thus suggesting applications as electronic switches based on self-healing soft devices.
Original languageEnglish
Article number339
Pages (from-to)1-19
Number of pages17
JournalPolymers
Volume13
Issue number3
DOIs
Publication statusPublished - 21-Jan-2021

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