Self-healing materials with microvascular networks

Nat Mater. 2007 Aug;6(8):581-5. doi: 10.1038/nmat1934. Epub 2007 Jun 10.

Abstract

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.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Artificial Organs
  • Biocompatible Materials / chemistry
  • Biomimetic Materials / chemistry*
  • Catalysis
  • Humans
  • Mechanics
  • Polymers / chemistry*
  • Skin
  • Wound Healing

Substances

  • Biocompatible Materials
  • Polymers