Self-healing of nanofiber-based composites in the course of stretching
- Authors
- Lee, Min Wook; Sett, Soumyadip; Yoon, Sam S.; Yarin, Alexander L.
- Issue Date
- 26-10월-2016
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Self-healing; Nanofiber; Composite
- Citation
- POLYMER, v.103, pp.180 - 188
- Indexed
- SCIE
SCOPUS
- Journal Title
- POLYMER
- Volume
- 103
- Start Page
- 180
- End Page
- 188
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/87143
- DOI
- 10.1016/j.polymer.2016.09.037
- ISSN
- 0032-3861
- 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. (C) 2016 Elsevier Ltd. All rights reserved.
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- Appears in
Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
- College of Engineering > College of Engineering > 1. Journal Articles
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