Self-Healing Protective Coating Corresponding to Crack-Growth
발표자
()
초록
내용
Self-healing materials are a kind of biomimetic materials that have the function to heal itself from damage. Recently, self-healing protective coatings, which can automatically heal the damage that occurs in them, are being studied to extend material lifetime, reduce maintenance cost and enhance public safety. One of the healing methods of self-healing materials is to disperse microcapsules containing healing substance in the material. When a crack occurs, microcapsules in the crack’s passing area are broken and healing material flows out to have a healing function. Microcapsule-type can heal not only topical crack but also large crack and can be applied to various kinds of materials. However, according to the existing studies, the microcapsule-type has the disadvantage that secondary defects may occur as the defect width increases. In this study, using a viscoelastic PDMS type polymer, a self-healing protective coating that maintains healed state upon crack-growth was developed.