When the material cracks, the microcapsules rupture and release the healing agent into the damaged region through capillary action. As the healing agent contacts the embedded catalyst, polymerization is initiated which then bonds the crack face closed."
In recent fracture tests, the self-healed composites recovered as much as 75 percent of their original strength. This technology could increase the lifetime of structural components, perhaps by as much as two or three times
http://www.sciencedaily.com/releases/2001/02/010215075006.htm
posted by jnmullendore @ Thursday, October 26, 2006
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