Self-healing of an epoxy resin using scandium(III) triflate as a catalytic curing agent

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

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

A novel Lewis acid-catalysed self-healing system is investigated for implementation into epoxy-based fibre reinforced polymer (FRP) composite materials. The catalyst, scandium(III) triflate, is selected using a qualitative approach and subsequently embedded with pre-synthesised epoxy-solvent loaded microcapsules, into an epoxy resin. Healing is initiated when microcapsules are ruptured at the onset of crack propagation. The epoxy monomer healing agent contained within actively undergoes ring-opening polymerisation (ROP) on contact with the locally dispersed catalyst, forming a new polymer to bridge the two fractured crack planes. Self-healing performance is quantified using a tapered double cantilever beam (TDCB) test specimen and the effects of microcapsule content and healing temperature and time are all independently considered. As an initial 'proof of concept' study, results show that a material recovery value of greater than 80% fracture strength is achieved for this novel Lewis acid-catalysed self-healing epoxy resin.

Original languageEnglish
Pages (from-to)4624-4631
Number of pages8
JournalAdvanced Functional Materials
Volume21
Issue number24
DOIs
Publication statusPublished - 20 Dec 2011

Fingerprint

Scandium
Epoxy Resins
scandium
healing
epoxy resins
curing
Epoxy resins
Capsules
Curing
Lewis Acids
Catalysts
Acids
Ring opening polymerization
Polymers
Cantilever beams
Fracture toughness
Crack propagation
Monomers
Cracks
Recovery

Keywords

  • autonomic materials
  • catalyst
  • composites
  • microcapsule
  • ring-opening polymerisation
  • self-healing

ASJC Scopus subject areas

  • Biomaterials
  • Electrochemistry
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Coope, T. S., Mayer, U. F. J., Wass, D. F., Trask, R. S., & Bond, I. P. (2011). Self-healing of an epoxy resin using scandium(III) triflate as a catalytic curing agent. Advanced Functional Materials, 21(24), 4624-4631. https://doi.org/10.1002/adfm.201101660

Self-healing of an epoxy resin using scandium(III) triflate as a catalytic curing agent. / Coope, Tim S.; Mayer, Ulrich F J; Wass, Duncan F.; Trask, Richard S.; Bond, Ian P.

In: Advanced Functional Materials, Vol. 21, No. 24, 20.12.2011, p. 4624-4631.

Research output: Contribution to journalArticle

Coope, Tim S. ; Mayer, Ulrich F J ; Wass, Duncan F. ; Trask, Richard S. ; Bond, Ian P. / Self-healing of an epoxy resin using scandium(III) triflate as a catalytic curing agent. In: Advanced Functional Materials. 2011 ; Vol. 21, No. 24. pp. 4624-4631.
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