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Cellulose nanocrystal-polyetherimide hybrid nanofibrous interleaves for enhanced interlaminar fracture toughness of carbon fibre/epoxy composites

Research output: Contribution to journalArticle

Original languageEnglish
Article number107744
Number of pages8
JournalComposites Science and Technology
Early online date15 Jul 2019
DateAccepted/In press - 14 Jul 2019
DateE-pub ahead of print - 15 Jul 2019
DatePublished (current) - 29 Sep 2019


The effect of electrospun cellulose nanocrystals (CNCs)-polyetherimide (PEI) hybrid nanofibrous mats on Mode I and Mode II interlaminar fracture toughness of unidirectional carbon/epoxy composite laminates is demonstrated. It is shown that the CNCs reinforced PEI nanofibrillar interleaves result in a ~28% increase in Mode I initial fracture toughness values compared to neat PEI nanofibrous interleaves. Specifically, the interrelated micro- and nano-scale toughening mechanisms including carbon fibre bridging, fibre necking, fibre rupture with CNCs aggregates, and nanofibre rupture contributed to the fracture toughness improvements under Mode-I loading. Nano-scale mechanisms of shear hackles, and crack pinning by CNCs aggregates increased the Mode II fracture toughness up to ~3 kJ/m2 as a result of a 6 wt.% CNCs reinforced PEI nanofibrillar mat interleaves. Interleaving laminated composites with electrospun CNCs-PEI hybrid nanofibrillar mats has been demonstrated as a novel and prospective strategy to strengthen and toughen interlaminar zones of carbon/epoxy composite laminates.

    Structured keywords

  • Bristol Composites Institute ACCIS

    Research areas

  • Cellulose nanocrystals, Electrospinning, Fracture toughness, Delamination



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    Embargo ends: 15/07/20

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    Licence: CC BY-NC-ND


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