| 초록 |
A protective coating is used to protect surface of a material from various deterioration factors. When cracks form and propagate in the coating, water, chloride ion, and carbon dioxide would penetrate through the cracks. This results in deterioration of the materials, leading to reduction in their serviceability. In this work we have developed self-healing protective coating systems for concrete or metal in which microcracks or scratches can be repaired by sunlight or UV light. Healing-agent-loaded microcapsules are embedded in a coating matrix to obtain a self-healing protective coating. Upon damage-induced cracking, the microcapsules are ruptured by the propagating crack fronts, resulting in release of the healing agent into the crack by capillary action and then self healing is achieved by photoirradiation. |
