Electroactive performance and cost evaluation of carbon nanotubes and carbon black as conductive fillers in self-healing shape memory polymers and other composites

Felipe Orozco, Alex Salvatore, Anchista Sakulmankongsuk, Diego Ribas Gomes, Yutao Pei, Esteban Araya-Hermosilla, Andrea Pucci, Ignacio Moreno-Villoslada, Francesco Picchioni, Ranjita K. Bose*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Multiwalled carbon nanotubes (MWCNT) and carbon black (CB) have been widely used as conductive fillers in electroactive polymer composites. MWCNT-based composites generally have lower resistivity and percolation thresholds, while CB-based ones are considerably cheaper. To balance these pros and cons, ternary composites (TCs) (polymer-MWCNT-CB) can be formulated. Here, we prepared electroactive MWCNT-CB TCs capable of self-healing and with shape memory properties, based on polyketones reversibly-crosslinked via Diels-Alder chemistry. Unexpectedly, the cheaper CB-rich formulations had lower resistivities, thus better electroactive self-healing and shape memory responses. Nonetheless, not all electroactive MWCNT-CB TCs have this clear cost-effectiveness. We evaluated the cost-performance of multiple reported MWCNT-CB TCs systems and found different general trends (positive, negative, and synergistic cost-efficiency relationships). Thus, the cost-effectiveness of these fillers (and their combination) greatly depends on each composite system and what it is intended for. This work includes the first systematic report on cost-performance of MWCNT and CB as conductive fillers.

Original languageEnglish
Article number125365
JournalPolymer
Volume260
Early online date23-Sep-2022
DOIs
Publication statusPublished - 8-Nov-2022

Keywords

  • Cost-performance analysis
  • Electrical properties
  • Microstructural analysis
  • Polymer-matrix composites (PMCs)

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