Self-healing structural composite materials

M. R. Kessler; N. R. Sottos; S. R. White

doi:10.1016/S1359-835X(03)00138-6

Self-healing structural composite materials

M. R. Kessler, N. R. Sottos, S. R. White

Research output: Contribution to journal › Article › peer-review

Abstract

A self-healing fiber-reinforced structural polymer matrix composite material is demonstrated. In the composite, a microencapsulated healing agent and a solid chemical catalyst are dispersed within the polymer matrix phase. Healing is triggered by crack propagation through the microcapsules, which then release the healing agent into the crack plane. Subsequent exposure of the healing agent to the chemical catalyst initiates polymerization and bonding of the crack faces. Self-healing (autonomic healing) is demonstrated on width-tapered double cantilever beam fracture specimens in which a mid-plane delamination is introduced and then allowed to heal. Autonomic healing at room temperature yields as much as 45% recovery of virgin interlaminar fracture toughness, while healing at 80 °C increases the recovery to over 80%. The in situ kinetics of healing in structural composites is investigated in comparison to that of neat epoxy resin.

Original language	English (US)
Pages (from-to)	743-753
Number of pages	11
Journal	Composites Part A: Applied Science and Manufacturing
Volume	34
Issue number	8
DOIs	https://doi.org/10.1016/S1359-835X(03)00138-6
State	Published - Aug 2003

Keywords

A. Polymer-matrix composites (PMCs)
B. Delamination
B. Fracture toughness
E. Repair

ASJC Scopus subject areas

Ceramics and Composites

Online availability

10.1016/S1359-835X(03)00138-6

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title = "Self-healing structural composite materials",

abstract = "A self-healing fiber-reinforced structural polymer matrix composite material is demonstrated. In the composite, a microencapsulated healing agent and a solid chemical catalyst are dispersed within the polymer matrix phase. Healing is triggered by crack propagation through the microcapsules, which then release the healing agent into the crack plane. Subsequent exposure of the healing agent to the chemical catalyst initiates polymerization and bonding of the crack faces. Self-healing (autonomic healing) is demonstrated on width-tapered double cantilever beam fracture specimens in which a mid-plane delamination is introduced and then allowed to heal. Autonomic healing at room temperature yields as much as 45% recovery of virgin interlaminar fracture toughness, while healing at 80 °C increases the recovery to over 80%. The in situ kinetics of healing in structural composites is investigated in comparison to that of neat epoxy resin.",

keywords = "A. Polymer-matrix composites (PMCs), B. Delamination, B. Fracture toughness, E. Repair",

author = "Kessler, {M. R.} and Sottos, {N. R.} and White, {S. R.}",

note = "Funding Information: Funding for this work has been provided by the AFOSR Aerospace and Materials Science Directorate (F49620-00-1-0094) and by a Graduate Fellowship from the Beckman Institute for Advanced Science and Technology at the University of Illinois at Urbana-Champaign. Electron microscopy was carried out in the Center for Microanalysis of Materials, University of Illinois, which is supported by the US Department of Energy. The authors would like to thank Mr Jon Young for his help with specimen manufacturing and testing. The authors gratefully acknowledge the technical advice and guidance of Professors Jeffrey Moore, Philippe Geubelle, and Paul Braun and to Mr Eric Brown and Dr Suresh Sriram throughout this investigation. ",

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AU - White, S. R.

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PY - 2003/8

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N2 - A self-healing fiber-reinforced structural polymer matrix composite material is demonstrated. In the composite, a microencapsulated healing agent and a solid chemical catalyst are dispersed within the polymer matrix phase. Healing is triggered by crack propagation through the microcapsules, which then release the healing agent into the crack plane. Subsequent exposure of the healing agent to the chemical catalyst initiates polymerization and bonding of the crack faces. Self-healing (autonomic healing) is demonstrated on width-tapered double cantilever beam fracture specimens in which a mid-plane delamination is introduced and then allowed to heal. Autonomic healing at room temperature yields as much as 45% recovery of virgin interlaminar fracture toughness, while healing at 80 °C increases the recovery to over 80%. The in situ kinetics of healing in structural composites is investigated in comparison to that of neat epoxy resin.

AB - A self-healing fiber-reinforced structural polymer matrix composite material is demonstrated. In the composite, a microencapsulated healing agent and a solid chemical catalyst are dispersed within the polymer matrix phase. Healing is triggered by crack propagation through the microcapsules, which then release the healing agent into the crack plane. Subsequent exposure of the healing agent to the chemical catalyst initiates polymerization and bonding of the crack faces. Self-healing (autonomic healing) is demonstrated on width-tapered double cantilever beam fracture specimens in which a mid-plane delamination is introduced and then allowed to heal. Autonomic healing at room temperature yields as much as 45% recovery of virgin interlaminar fracture toughness, while healing at 80 °C increases the recovery to over 80%. The in situ kinetics of healing in structural composites is investigated in comparison to that of neat epoxy resin.

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KW - E. Repair

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Self-healing structural composite materials

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