3D printing processability of a thermally conductive compound based on carbon nanofiller-modified thermoplastic polyamide 12

Zhenxue Zhang, Eleni GKartzou, Simon Jetin, Dionisis Semitekolos, Panagiotis-Nektarios Pappas, Xiaoying Li, Anna Karatza, Panagiotis Zouboulis, Aikaterini-flora Trompeta, Nikolaos Koutroumanis, Costas Galiotis, Costas A. Charitidis, Hanshan Dong

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Abstract

A polyamide (PA) 12-based thermoplastic composite was modified with carbon nanotubes (CNTs), CNTs grafted onto chopped carbon fibers (CFs), and graphene nanoplatelets (GNPs) with CNTs to improve its thermal conductivity for application as a heat sink in electronic components. The carbon-based nanofillers were examined by SEM and Raman. The laser flash method was used to measure the thermal diffusivity in order to calculate the thermal conductivity. Electrical conductivity measurements were made using a Keithley 6517B electrometer in the 2-point mode. The composite structure was examined by SEM and micro-CT. PA12 with 15 wt% of GNPs and 1 wt% CNTs demonstrated the highest thermal conductivity, and its processability was investigated, utilizing sequential interdependence tests to evaluate the composite material behavior during fused filament fabrication (FFF) 3D printing processing. Through this assessment, selected printing parameters were investigated to determine the optimum parametric combination and processability window for the composite material, revealing that the selected composition meets the necessary criteria to be processable with FFF.
Original languageEnglish
Article number470
Number of pages16
JournalPolymers
Volume14
Issue number3
DOIs
Publication statusPublished - 25 Jan 2022

Bibliographical note

Funding Information:
This research was funded by the EU H2020 Project “Smart by Design and Intelligent by Architecture for turbine blade fan and structural components systems” (SMARTFAN) under Grant no. 760779.

Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

  • Polyamide 12
  • carbon nanofiller
  • Carbon nanotube
  • graphene nanoplatelet
  • 3D printing
  • Thermal conductivity
  • compound
  • Graphene nanoplatelet
  • Compound
  • Carbon nanofiller

ASJC Scopus subject areas

  • Chemistry(all)
  • Polymers and Plastics

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