Abstract
Here we aim to elucidate the self-healing mechanisms in composites with embedded solution-blown nanofibers containing separate reservoirs of epoxy resin and hardener in their cores. In tensile tests of such composite materials with the resin- and hardener-containing solution-blown nanofibers embedded in a polymer matrix, it is shown that the fibers can be ruptured by stretching, thereby releasing the epoxy resin and hardener. Given a resting (or holding) period of 1–2 h, such materials can experience a restoration or even enhancement of stiffness in subsequent stretching, thereby displaying self-healing properties. In two model macroscopic experiments with a single crack tip, conducted in the Appendix with the aim to elucidate the self-healing mechanism, the epoxy resin and hardener released into the tip are shown to react with each other, resulting in a cured and hardened epoxy that heals the crack tip.
Original language | English |
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Pages (from-to) | 180-188 |
Number of pages | 9 |
Journal | Polymer |
Volume | 103 |
DOIs | |
Publication status | Published - 2016 Oct 26 |
Keywords
- Composite
- Nanofiber
- Self-healing
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry