期刊
SMART MATERIALS AND STRUCTURES
卷 23, 期 11, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0964-1726/23/11/115002
关键词
self-healing; fibre-reinforced; bio-inspired; triflate; repeated healing
资金
- UK Engineering and Physical Sciences Research Council (EPSRC) [EP/G036772/1]
- UK Ministry of Defence/Defence Science and Technology Laboratory
A self-healing, high performance, carbon fibre reinforced polymer (CFRP) composite is demonstrated by embedding a Lewis-acid catalytic curing agent within a laminate, manufactured using out of autoclave (OOA) composite manufacturing methods. Two configurations of healing agent delivery, pre-mixed and autonomous mixing, are investigated via injection of a healing agent through bio-inspired microvascular channels exposed on Mode I fractured crack planes. Healing is effected when an epoxy resin-solvent healing agent mixture reaches the boundary of embedded solid-state scandium(III) triflate (Sc(OTf)(3)) catalyst, located on the crack plane, to initiate the ring-opening polymerisation (ROP) of epoxides. Tailored self-healing agents confer high healing efficiency values after multiple healing cycles (69-108%) to successfully mitigate against crack propagation within the composite microstructure.
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