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Intrinsic self-healing and electrically conductive thermosetting nanocomposites

de Macedo Rooweder Lima, Guilherme (2019) Intrinsic self-healing and electrically conductive thermosetting nanocomposites. Master's Thesis / Essay, Chemical Engineering.


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In this project, we have designed and prepared electrically conductive nanocomposites by using thermally reversible thermoset polymers. The thermosets, which are based on reversible covalent bonds (Diels-Alder) and physical interactions (hydrogen bonding), are reinforced with multi-walled carbon nanotubes (MWCNTs) to render nanocomposites with electrically induced self-healing properties. The results showed self-healing behavior of these materials at nano-scale by means of rearranging MWCNTs as shown by microscopy, micro-scale by cracks repairing and enhancement of mechanical properties at macro-scale by higher elastic (10,57 GPa) and loss modulus (0,27 GPa) and damping factor (Tan delta 183 °C) in thermo-mechanical measurements. All these features point out to prolong the service life of polyketone, improve the product performance making it effectively stronger and more reliable. Moreover, overcoming the non-reprocessability of conventional cross-linked polymer nanocomposites after their service life. The latter represents a novel contribution to multifunctional nanocomposites that possess potential scalability and recyclability according to the “cradle to cradle” approach, a keystone in the current efforts for industrial sustainability.

Item Type: Thesis (Master's Thesis / Essay)
Supervisor nameSupervisor E mail
Degree programme: Chemical Engineering
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 26 Jul 2019
Last Modified: 08 Aug 2019 07:51

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