Metal triflates as catalytic curing agents in self-healing fibre reinforced polymer composite materials

Tim S. Coope, Duncan F. Wass, Richard S. Trask, Ian P. Bond

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

A self-healing, high performance, fibre reinforced polymer (FRP) composite material is demonstrated by employing a Lewis acid-catalysed epoxy self-healing agent (SHA) within a laminate manufactured using existing industrial methods. Thermal cure analysis and mechanical testing is employed to characterise the self-healed polymer. A bio-inspired series of vascules incorporated into an FRP composite material facilitates the delivery of SHAs to exposed fractured crack planes. Healing is effected by ring-opening polymerisation (ROP) of an epoxy resin using novel metal triflate catalysts injected after Mode I crack opening displacement. Strong adhesive compatibility with the host matrix confers full recovery of mechanical properties (>99% healing). An in-house developed Lewis acid-catalysed self-healing system, comprised of solid-phase metal triflate catalysts and diglycidyl ether bisphenol A (DGEBA) epoxy resin, is employed to achieve full fracture toughness recovery of the fibre reinforced polymer composite material. Mechanical testing of the healed material clearly shows a ductile failure, a failure mechanism not typically associated with inherently brittle materials such as epoxy.

Original languageEnglish
Pages (from-to)208-218
Number of pages11
JournalMacromolecular Materials and Engineering
Volume299
Issue number2
DOIs
Publication statusPublished - Feb 2014

Keywords

  • bio-inspired
  • ductile failure
  • epoxy
  • ring-opening polymerisation
  • self-healing

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics
  • Chemical Engineering(all)

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