Positioning and aligning CNTs by external magnetic field to assist localised epoxy cure

Giampaolo Ariu, Ian Hamerton, Dmitry Ivanov

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)
355 Downloads (Pure)

Abstract

This work focuses on the generation of conductive networks through the localised alignment of nano fillers, such as multi-walled carbon nanotubes (MWCNTs). The feasibility of alignment and positioning of functionalised MWCNTs by external DC magnetic fields was investigated. The aim of this manipulation is to enhance resin curing through AC induction heating due to hysteresis losses from the nanotubes. Experimental analyses focused on in-depth assessment of the nanotube functionalisation, processing and characterisation of magnetic, rheological and cure kinetics properties of the MWCNT solution. The study has shown that an external magnetic field has great potential for positioning and alignment of CNTs. The study demonstrated potential for creating well-ordered architectures with an unprecedented level of control of network geometry. Magnetic characterisation indicated cobalt-plated nanotubes to be the most suitable candidate for magnetic alignment due to their high magnetic sensitivity. Epoxy/metal-plated CNT nanocomposite systems were validated by thermal analysis as induction heating mediums. The curing process could therefore be optimised by the use of dielectric resins. This study offers a first step towards the proof of concept of this technique as a novel repair technology
Original languageEnglish
Pages (from-to)508-516
Number of pages9
JournalOpen Physics
Volume14
Issue number1
Early online date29 Dec 2016
DOIs
Publication statusPublished - Jan 2017

Structured keywords

  • Bristol Composites Institute ACCIS
  • Composites UTC

Keywords

  • Multi-walled carbon nanotubes
  • high conductivity connections
  • electroless plating
  • magnetic and thermal characterisation
  • rheological analysis

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