Abstract
Repeatable healing function of damaged materials is one of the promising topics in self-healing materials. As a solution of this challenge, we previously proposed the introduction of holes as stress-activated micro-channels on the surface of microcapsules as self-healing medium. Here, these micro-channels must be opened by stress field induced by micro-cracks and the healing agent (core material of microcapsules) will be repeatedly leaked from opened micro-channels. In this study, the method to apply channels, which are not broken by repeated loading-unloading and leak core material repeatedly, to microcapsules was studied utilizing the removal of glass beads treaded with release agent as secondary phase in membrane. In addition, the method to close these micro-channels during or after healing was also studied. Finally, the possibility to create stress-activated micro-channels was discussed.
