Show simple item record

dc.contributor.authorLee, Min Wook
dc.contributor.authorAn, Seongpil
dc.contributor.authorKim, Yong-Il
dc.contributor.authorYoon, Sam, S.
dc.contributor.authorYarin, Alexander, L.
dc.description.abstractIn this study, electrospun core-shell nanofibers containing healing agents are embedded into a three-dimensional bulk matrix in a simple versatile process. Two types of the healing agents (resin monomer and cure) are encapsulated inside the nanofiber cores. The core-shell fibers are encased in the macroscopic three-dimensional bulky material. To achieve this goal, the electrospun core-shell fibers containing two components of PDMS (either resin monomer or cure) are directly embedded into an uncured PDMS bath and dispersed there, essentially forming a monolithic composite. For the evaluation of the self-healing features, the interfacial cohesion energy is measured at the cut surface of such a material. Namely, the bulk of the prepared self-healing material is entirely cut into two parts using a razor blade and then re-adhered due to the self-curing process associated with the released healing agents. The results reveal that the self-healing fiber network works and releases a sufficient amount of resin monomer and cure at the cut surface to facilitate self-healing. In addition, chopped into short filaments core-shell fibers were embedded into highly porous sponge-like media. After a mechanical damage in compression or shearing fatigue, this sponge-like material also revealed restoration of stiffness due to the released self-healing. The sponges revealed a 100% recovery and even enhancement after being damage in the cyclic compression and shearing tests, even though only 0.086% of the healing agents were embedded per sponge mass and finely dispersed in it.en_US
dc.description.sponsorshipThis work was supported by the International Collaboration Program funded by the Agency for Defense Development of the Republic of Korea.en_US
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
dc.titleSelf-healing three-dimensional bulk materials based on core-shell nanofibersen_US
dc.identifier.citationLee, M. W., An, S., Kim, Y. I., Yoon, S. S. and Yarin, A. L. Self-healing three-dimensional bulk materials based on core-shell nanofibers. Chemical Engineering Journal. 2018. 334: 1093-1100. 10.1016/j.cej.2017.10.0en_US

Files in this item


This item appears in the following Collection(s)

Show simple item record

Attribution-NonCommercial-NoDerivs 3.0 United States
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 United States