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

Bolimowski, P A, Wass, Duncan and Bond, I P 2016. Assessment of microcapsule-catalyst particles healing system in high performance fibre reinforced polymer composite. Smart Materials and Structures 25 (8) , 084009. 10.1088/0964-1726/25/8/084009

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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 10 wt% of solid phase catalyst and 11 wt% of epoxy microcapsules. However, a significant (80%) decrease in initial strain energy release rate (G IC) was observed for specimens with the embedded healing chemistries.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Cardiff Catalysis Institute (CCI)
Chemistry
Publisher: Institute of Physics
ISSN: 0964-1726
Date of First Compliant Deposit: 26 October 2018
Date of Acceptance: 11 May 2016
Last Modified: 01 Feb 2019 13:52
URI: http://orca.cf.ac.uk/id/eprint/116210

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