Multiscale characterisation of the electrical response of 3D printed carbon black Polylactic acid

Robin Delbart, Thomas Noble, Laurane Roumy, Juan Carlos Fernandez Toribio, Colin Robert, Thuy-Quynh Truong Hoang, Francisca Martinez-Hergueta*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

In this paper, the electrical response of a carbon black polylactic acid 3D printed polymer is characterised in detail by a combination of advanced experimental techniques at different scale lengths. The electrical properties as a function of the temperature become repeatable after the second heating cycle, exhibiting different trends as a function of the printing parameters. Joule heating and oven-heating techniques have been compared, showing the advantages of the Joule heating method to maintain electrical conductivity due to the lower thermal inertia. Small-Angle X-Ray Scattering has been employed to discern the underlying physics, showing the crucial role of crystallinity, filler dispersion and carbon black aggregates to form an effective segregated conductive network. This investigation provides guidelines to produce 3D-printed devices with a reliable electrical response and the governing equations to operate them with sufficient accuracy for engineering applications.
Original languageEnglish
Pages (from-to)13118-13135
JournalJournal of Materials Science
Issue number32
Early online date19 Aug 2023
Publication statusE-pub ahead of print - 19 Aug 2023


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