Radially Grown Graphene Nanoflakes on Carbon Fibers as Reinforcing Interface for Polymer Composites

Anastasios Karakasidis, Abhijit Ganguly, Kyriaki Tsirka, Akiviadis Paipetis, P Papakonstantinou

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)
37 Downloads (Pure)

Abstract

The development of nanoscale reinforcements, which can tailor the interfacial strength and impart multiple functionalities on carbon fiber reinforced polymer (CFRP) composites, remains a challenge for their large-scale adoption in diverse applications ranging from aerospace to transportation and construction industries. In this work radially aligned graphene nanoflakes (GNFs), grown directly on carbon fibers (CFs) via a simple one-step microwave plasma enhanced chemical vapor deposition method, without any catalyst, were used as a novel nano-reinforcement interface. A remarkable 28% enhancement in the tensile strength of the hybrid fibers was observed via single-fiber tensile strength tests, whereas the interfacial shear strength (IFSS) increased by 101.5%. Our results demonstrate that GNFs not only improve the interfacial strength between the GNFs and the epoxy resin but also enhance the in-plane mechanical strength of the CFs - a well-known problem encountered with the direct growth of carbon nanotubes on CFs. In addition, GNFs provided embedded functionality via increased electrical conductivity (60.5% improvement for yarns and 16% for single fiber) and electrochemical capacitance (157% for yarns). This work indicates the potential of GNFs as an interphase for the simplified and cost-effective production of stronger multifunctional CFRP composite materials.

Original languageEnglish
Pages (from-to)2402-2413
JournalACS Applied Nano Materials
Volume3
Issue number3
Early online date25 Feb 2020
DOIs
Publication statusPublished - 31 Mar 2020

Keywords

  • electrical conductivity
  • electrochemical capacitance
  • hierarchical structures
  • interfacial shear strength (IFSS)
  • multifunctional fibers
  • tensile strength
  • vertical graphene nanoflakes (GNFs)

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