Abstract
Self-healing woven glass fabric-reinforced epoxy composite laminates were made byembedding epoxy- and mercaptan-loaded microcapsules. After being subjected tolow-velocity impact, the laminates were able to heal the damage in an autonomic way atroom temperature. The healing-induced reduction in the damaged areas was visualizedusing a scanning acoustic microscope. The rate of damage area reduction, whichis closely related to the effect of crack rehabilitation and mechanical recovery,is a function of impact energy, content and size of the healing microcapsules.Minor damage, such as microcracks in the matrix, can be completely repaired bythe healing system without manual intervention, including external pressure.Microcapsules with larger size and/or higher concentration are propitious fordelivering more healing agent to cracked portions, while imposition of lateral pressureon damaged specimens forces the separated faces to approach each other. Bothcan improve the rate of damage area reduction in the case of severe damage.
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