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Heat-generation capability of CNT/PDMS nanocomposites with different CF lengths: experimental and numerical approaches

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2025, 35(3), pp.1247~1258
  • DOI : 10.1007/s42823-024-00842-x
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : June 27, 2024
  • Accepted : January 27, 2025
  • Published : June 5, 2025

Shimelis Ermias 1 Bang Jinho 1 Jung Jongwon 1 Jang Daeik 2 Yang Beomjoo 1

1충북대학교
2University of Pittsburgh

Accredited

ABSTRACT

Conductive polymeric composites (CPC) incorporating carbon nanotubes (CNT) and carbon fibers (CF) offer promising potential in self-heating applications due to their superior electrical and thermal properties. This study investigates the synergistic effects of CNT and CF on the electrical conductivity and heat-generation capabilities of CNT/polydimethylsiloxane (PDMS) nanocomposites. Three CF lengths (0.1 mm, 3 mm, and 6 mm) were systematically evaluated to establish hierarchical conductive networks. The incorporation of 6 mm CF into CNT/PDMS composites resulted in a 72% increase in electrical conductivity compared to composites with 0.1 mm CF. Despite these enhancements in electrical performance, the heat-generation capabilities, based on simulations and experimental validation, showed minimal dependence on CF length. A micromechanics-based numerical approach was used to compare and validate the experimental findings, identifying limitations in current analytical models, especially in predicting the heat-generation behavior.

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