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Shape memory polymer-based self-healing composites

Recent Advances in Smart Self-Healing Polymers and Composites, Page: 305-383
2022
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Book Chapter Description

In this chapter, we first reviewed the various crack self-healing strategies. We then focused on self-healing of thermosetting shape memory polymer (SMP) composite according to the close-then-heal (CTH) healing strategy. Three types of composite structures were prepared, including thermosetting SMP-based syntactic foam cored sandwich, grid stiffened thermosetting SMP-based syntactic foam cored sandwich, and 3D woven fabric reinforced thermosetting SMP based syntactic foam composite. The prepared fiber-reinforced composite panels were repeatedly impact damaged and healed according to the CTH scheme. The healing efficiency was evaluated per relevant mechanical strength tests. Damage sensing by percolated carbon nanotube network was also investigated hereby. The comprehensive experimental program confirms that the CTH scheme can heal structural-length scale cracks repeatedly, efficiently, timely, molecularly, and have a potential to heal autonomously.

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