The self-healing sandwich panel: Production of epoxy based self-healing capsules, self-healable sandwich panel development, and experimental measurement of self-healing performance


Özer H., Kuzu E., Ozada C., Unal M., Yazıcı M.

CONSTRUCTION AND BUILDING MATERIALS, vol.310, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 310
  • Publication Date: 2021
  • Doi Number: 10.1016/j.conbuildmat.2021.125303
  • Journal Name: CONSTRUCTION AND BUILDING MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, CAB Abstracts, Communication Abstracts, INSPEC, Metadex, Veterinary Science Database, Civil Engineering Abstracts
  • Keywords: Self-healing, Macro-capsule, Energy absorption, Sandwich structure, Impact, High strain rate, Epoxy resin, BEHAVIOR, MICROCAPSULE
  • Bursa Uludag University Affiliated: Yes

Abstract

In this study, macro-capsules were developed by encapsulating epoxy and hardener agents for macro-level structural healing. Obtained macro-capsules were placed into an aluminum honeycomb core to obtain selfhealable sandwich structures. In principle, the aim was to self-repair damaged sandwich structures by breaking the macro-capsules with the resulting leak of healing agents into the cells of the core. The developed sandwich structure was subjected to repetitive quasi-static compression and high strain rate compression impact tests. According to the experimental results, the sandwich structure gained a very effective self-healing facility and maintained this property under multiple repetitive loadings. In addition, the energy absorption capacity of honeycomb aluminum sandwich structures was increased by approximately 80% under both quasi-static and high-speed impact loads.