Low-temperature grafting of carbon nanotubes on carbon fibers using a bimetallic floating catalyst

Geunsung Lee, Ji Ho Youk, Jinyong Lee, In Hwan Sul, Woong Ryeol Yu

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

The degradation mechanism of CFs experiencing the catalytic growth of CNTs on their surface through high-temperature CVD was revealed using microstructural analysis. Catalysts nanoparticles, if their energy was high enough to diffuse into CFs, generated micro-voids in CFs and reduced their tensile strength. Herein, we report a new low-temperature processing route to grow CNTs on CF surfaces without mechanically degrading the CFs. The use of a Ni–Fe bimetallic catalyst was key to achieving the growth of CNTs at low temperature, e.g., 500 °C. Catalyst diffusion into the CFs during CVD was inhibited at this temperature, which facilitated uniform growth of CNTs on only the CF surfaces and minimized internal structural changes of the CFs.

Original languageEnglish
Pages (from-to)118-126
Number of pages9
JournalDiamond and Related Materials
Volume68
DOIs
StatePublished - 1 Sep 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

  • Carbon fiber
  • Carbon nanotubes
  • Chemical vapor deposition
  • Direct growth
  • Low temperature

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