Facile microencapsulation of HDI for self-healing anticorrosion coatings

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Most cited references 31

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Autonomic healing of polymer composites.

S R White, N Sottos, P H Geubelle … (2001)

Structural polymers are susceptible to damage in the form of cracks, which form deep within the structure where detection is difficult and repair is almost impossible. Cracking leads to mechanical degradation of fibre-reinforced polymer composites; in microelectronic polymeric components it can also lead to electrical failure. Microcracking induced by thermal and mechanical fatigue is also a long-standing problem in polymer adhesives. Regardless of the application, once cracks have formed within polymeric materials, the integrity of the structure is significantly compromised. Experiments exploring the concept of self-repair have been previously reported, but the only successful crack-healing methods that have been reported so far require some form of manual intervention. Here we report a structural polymeric material with the ability to autonomically heal cracks. The material incorporates a microencapsulated healing agent that is released upon crack intrusion. Polymerization of the healing agent is then triggered by contact with an embedded catalyst, bonding the crack faces. Our fracture experiments yield as much as 75% recovery in toughness, and we expect that our approach will be applicable to other brittle materials systems (including ceramics and glasses).

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Self-healing materials with microvascular networks.

Kathleen S. Toohey, Nancy R Sottos, Jennifer A Lewis … (2007)

Self-healing polymers composed of microencapsulated healing agents exhibit remarkable mechanical performance and regenerative ability, but are limited to autonomic repair of a single damage event in a given location. Self-healing is triggered by crack-induced rupture of the embedded capsules; thus, once a localized region is depleted of healing agent, further repair is precluded. Re-mendable polymers can achieve multiple healing cycles, but require external intervention in the form of heat treatment and applied pressure. Here, we report a self-healing system capable of autonomously repairing repeated damage events. Our bio-inspired coating-substrate design delivers healing agent to cracks in a polymer coating via a three-dimensional microvascular network embedded in the substrate. Crack damage in the epoxy coating is healed repeatedly. This approach opens new avenues for continuous delivery of healing agents for self-repair as well as other active species for additional functionality.

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Self-Healing Polymers and Composites

B.J. Blaiszik, S.L.B. Kramer, S.C. Olugebefola … (2010)

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Journal

Journal ID (publisher-id): JMACEP

Title: Journal of Materials Chemistry

Abbreviated Title: J. Mater. Chem.

Publisher: Royal Society of Chemistry (RSC)

ISSN (Print): 0959-9428

ISSN (Electronic): 1364-5501

Publication date Created: 2011

Publication date (Print): 2011

Volume: 21

Issue: 30

Page: 11123

Article

DOI: 10.1039/c1jm10794a

SO-VID: b7d21fca-795e-41bd-bef9-01bbfdc623e6

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Facile microencapsulation of HDI for self-healing anticorrosion coatings

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Abstract

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Stress signalling in stem cells

Most cited references 31

Autonomic healing of polymer composites.

Self-healing materials with microvascular networks.

Self-Healing Polymers and Composites

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