Image of the Week - May 23, 2002

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Microcapsules for Self-Healing Polymer Composites

These images illustrate the structure of microcapsules used in self-healing polymers. The four ESEM images show ruptured microcapsules in the fracture plane, individual microcapsules, surface morphology of a single burst microcapsule, and a cross-section of the microcapsule shell wall (clockwise from top left). The foreground sequence of light microscopy images shows the rupture of microcapsules and subsequent release of healing agent in the presence of a propagating crack [White et al., Nature 2001]. The background light microscopy image shows a perpendicular view of a crack propagating through a field of microcapsules [Brown, Journal of Microencapsulation {cover} 2002].

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Uploaded Thu May 23 11:07:37 2002 by Scott Jay Robinson

Updated Tue Jan 26 15:43:27 2010 by Daniel E. Weber