Kathleen S. Toohey

Learn More
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,(More)
[*] Prof. N. R. Sottos, Prof. J. A. Lewis, C. J. Hansen, W. Wu, K. S. Toohey, Prof. S. R. White Autonomic Materials Systems Group Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign Urbana, IL 61801 (USA) E-mail: n-sottos@illinois.edu; jalewis@illinois.edu Prof. N. R. Sottos, Prof. J. A. Lewis, C. J. Hansen, W.(More)
Multiple healing cycles of a single crack in a brittle polymer coating are achieved by microvascular delivery of a two-part, epoxy-based self-healing chemistry. Epoxy resin and amine-based curing agents are transported to the crack plane through two sets of independent vascular networks embedded within a ductile polymer substrate beneath the coating. The(More)
Mechanical properties of soft biological materials are dependent on the responses of the two phases of which they are comprised: the solid matrix and interstitial fluid. Indentation techniques are commonly used to measure properties of such materials, but comparisons between different experimental and analytical techniques can be difficult. Most models(More)
  • 1