Core‐shell nanofibers for developing self‐healing materials: Recent progress and future directions

Abstract

The knowledge of self‐healing was developed to ensure more durable and reliable engineering materials. Healing agent encapsulation has shown to be one of the most promising approaches in self‐healing technology. The healing agents were encapsulated within micro/nanocapsules, micro/nanofibers, and vascular‐based networks. Among the methods, using core‐shell nanofibers showed a compromising potential for the development of self‐healing nanofibers with the minimum drawbacks and limitations. The aim of the present paper is to report the recent contributions on the recent progress of self‐healing materials using core‐shell nanofibers to provide insights for the further development of self‐healing polymeric materials both in academic research and scalable fabrication of polymeric parts in the industries.

Self-Healing Nanofibers for Engineering Applications

“…An effective self-healing nanofiber with a thin layer can recover the mechanical properties after being damaged by tensile, delamination, and bending forces . The core/shell (C/S) fiber morphologies enable large amounts of SH agents to entrap large amounts in their core . It has been shown that the addition of healant-loaded C/S nanofibers substantially enhanced the primary mechanical performance and resulted in the self-healing of composites that could recover their initial mechanical performance after failing …”

“…It still needs to be extended to systems such as aerogels, hydrogels, and biomedical materials. Also, there is a scope of advancement in constructing nanocapsules and healants-loaded nanofibers by altering the operational framework to obtain better efficacy …”

“…168 The solution-blown method is a scalable procedure to formulate C/S fiber (micro-or nanorange), and a self-healable system was demonstrated through static and fatigue tests. 172 In 2016, Lee et al integrated a self-healing mechanism with the solution blown technique to fabricate composite shell−core nanofiber for a self-healable system utilized in static and fatigue loading. Figure 11 presents a schematic of the solution blown technique.…”

Mechanically Robust Flexible Multilayer Aramid Nanofibers and MXene Film for High-Performance Electromagnetic Interference Shielding and Thermal Insulation

“…Nanofiber could significantly reinforce the properties of the composite. [37,38] As a one-dimensional nanofiber, aramid nanofiber (ANF) presents ultra-high strength, high modulus, large specific surface area and excellent stability due to the strong interactions between molecular chains such as hydrogen bonds, van der Waals forces and high crystallinity [39][40][41][42][43][44].…”

Interpenetrating organic–inorganic network: A short review on aerogel as a nanoporous filler in epoxy nanocomposite

“…The embedment of well‐dispersed nanofillers into a polymer matrix has been demonstrated to be a very appealing idea to improve the comprehensive performance of polymer nanocomposites, which is closely related to the increased interfacial area and reinforced interaction between the polymer matrix and the nanofillers . Nanofiller dispersion can be improved by optimizing the polymer‐nanofiller interface . The good interfacial adhesion between the polymer matrix and the nanofiller can be accomplished through using porous fillers .…”