Core-shell nanofibers encapsulating healing agents fabricated via the facile and economical coaxial electrospinning method, were incorporated in carbon fiber/epoxy composite panels to imbue them with self-healing ability. Two types of poly(methylmethacrylate) (PMMA) shell based nanofibers were fabricated, one with an epoxy resin core, the other with an amine-based curing agent core. The results indicated the incorporation of core-shell nanofibers containing healing agents not only improved the initial mechanical properties, but also resulted in self-healing carbon fiber-epoxy composites which were able to recover its initial mechanical properties up to four times after sustaining damage to failure. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.