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Issue 89, 2015
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Repeated self-healing of nano and micro scale cracks in epoxy based composites by tri-axial electrospun fibers including different healing agents

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Abstract

Multi-walled healing fibers with a novel architecture are fabricated through a direct, one-step tri-axial electrospinning process to encapsulate different healing agents inside the fibers with two distinct protective walls. Self healing systems based on ring opening metathesis polymerization (ROMP) and an amine–epoxy reaction are redesigned by utilizing these tri-axial fibers. In ROMP, Grubbs' catalysts are integrated in the outer wall of the fibers instead of the composite matrix to reduce the catalyst amount and prevent its deactivation during composite production. In the amine–epoxy healing system, epoxy resin and an amine-based curing agent are encapsulated separately by a multi-axial electrospinning. The presence of an extra layer facilitates the encapsulation of amine based healing agents with a highly active nature and extends the efficiency and life-time of the healing functionality. These new self-healing designs provide repeated self healing ability to preserve the mechanical properties of the composite by repairing micro and nano scale cracks under high loadings.

Graphical abstract: Repeated self-healing of nano and micro scale cracks in epoxy based composites by tri-axial electrospun fibers including different healing agents

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Publication details

The article was received on 03 Aug 2015, accepted on 19 Aug 2015 and first published on 20 Aug 2015


Article type: Paper
DOI: 10.1039/C5RA15483A
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Citation: RSC Adv., 2015,5, 73133-73145

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    Repeated self-healing of nano and micro scale cracks in epoxy based composites by tri-axial electrospun fibers including different healing agents

    J. S. Monfared Zanjani, B. S. Okan, I. Letofsky-Papst, Y. Menceloglu and M. Yildiz, RSC Adv., 2015, 5, 73133
    DOI: 10.1039/C5RA15483A

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