Assessment of microcapsule—catalyst particles healing system in high performance fibre reinforced polymer composite

Patryk Bolimowski, Ian Bond, Duncan Wass

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

6 Citations (Scopus)
291 Downloads (Pure)

Abstract

Autonomous self-healing in carbon fibre reinforced polymer (CFRP) is demonstrated using epoxy resin filled microcapsules and a solid-state catalyst. Microcapsules filled with oligomeric epoxy resin (20-450 µm) and particles of Sc(OTf)3 are embedded in an interleave region of a unidirectional CFRP laminate and tested under mode I loading. Double cantilever beam (DCB) test specimens containing variable concentrations of microcapsules and catalyst were prepared, tested and compared to those healed by manual injection with corresponding healing resin formulation. The healing efficiency was evaluated by comparing the maximum peak load recorded on load-displacement curves for pristine and healed specimens. A 44% maximum recovery was observed for specimens containing 10wt% of solid phase catalyst and 11wt% of epoxy microcapsules.
However, a significant (80%) decrease in initial strain energy release rate (GIC) was observed for specimens with the embedded healing chemistries.
Original languageEnglish
Article number084009
Number of pages12
JournalSmart Materials and Structures
Volume25
Issue number8
Early online date15 Jul 2016
DOIs
Publication statusPublished - Aug 2016

Keywords

  • CFRP
  • Self-healing
  • Epoxy microcapsules
  • Catalys
  • Fracture toughness

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