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- W39082247 abstract "We have previously demonstrated efficient and repeated self-healing of microcrack damage in polymers using capsule and vascular modalities for delivery of repair agents. More recently these concepts have been extended to the repair of damage in fiber reinforced composites and the restoration of electrical conductivity in circuits. While microcrack healing extends the lifetimes of devices that are limited by fatigue damage, the autonomic repair of damage from isolated, energetically intense events such as impact or blast loadings is an unsolved problem. The resulting defective regions are of macroscopic dimensions, characterized by both significant mass losses and high crack densities. Extension of previously developed self-healing concepts to the repair of damage following blast and impact loadings motivates concepts in synthetic materials regeneration. Synthetic materials regeneration aims to restore lost functionality by autonomic processes that mimic biological growth of tissue and appendages. A robust, autonomic regeneration process must first transfer sufficient healing fluid to span the voids in the damaged zone. Delivery of large quantities of healing fluids is achievable using vascular networks that are integrated into composites; however, the gap-filling process must also contend with environmental forces, minimally gravity, but also other factors such as wind, variable temperature, moisture and oxygen. After filling the voids, the fluid must then transform into a structural solid that has high strength and stiffness. To fill voids from puncture damage, we are developing novel gap-filling fluids that transform from a liquid, to a gel-like scaffold, to a mechanically strong solid polymer. Surface tension between the liquid healing agent and the damaged solid, as well as the fluid’s time dependent viscosity are physicochemical parameters critical to the success of the filling process. Characterization data on filling prototypical voids created in vascularized polymeric specimens will be presented, including the scaffold-forming chemistry, its transformation to a structural solid and the evolving mechanical properties. ICSHM2013 _________________________________________________________________________________" @default.
- W39082247 created "2016-06-24" @default.
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- W39082247 date "2013-06-16" @default.
- W39082247 modified "2023-09-24" @default.
- W39082247 title "Autonomic self-healing and materials regeneration" @default.
- W39082247 hasPublicationYear "2013" @default.
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