期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 245, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2023.110344
关键词
Self-healing; Microcapsule; Damage detection; Fiber/matrix composite; Thermosetting resin
In this study, the simultaneous self-healing of matrix and interface damage of fiber-reinforced composites was achieved by integrating extrinsic self-healing based on microcapsules and internal self-healing based on coordination interaction. The high exothermic action of epoxy resin and mercaptan repair agent in the self-healing process was observed using infrared thermal imaging technology for in-situ and real-time damage detection.
To increase the service life of composite materials, self-healing, and damage detection are essential. Although a lot of research has been done on self-healing and damage-reporting materials, it is still difficult to combine selfhealing with in-situ and real-time damage detection in bulk resin and composites. By integrating extrinsic selfhealing based on microcapsules and internal self-healing based on coordination interaction, the simultaneous self-healing of matrix and interface damage of fiber-reinforced composites was achieved in this study. Specifically, two-component microcapsules filled with epoxy/mercaptan repair agent were inserted into the matrix and Ag nanoparticles (AgNPs) were introduced into the surface of carbon fiber by electroless plating. Upon the rupture of microcapsules, matrix self-healing was used to reach a desirable level of synchronous healing efficiency. In the meantime, the excess sulfhydryl reacted with AgNPs on the fibers to establish a coordination bond for interface self-healing. More intriguingly, the high exothermic action of epoxy resin and mercaptan repair agent in the self-healing process was observed when using infrared thermal imaging technology for in-situ and real-time damage detection.
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