Self-healing carbon fiber-reinforced polymers for aerospace applications

Abstract

Self-healing carbon fiber-reinforced polymers (CFRPs) have been explored in-depth since the 2000s. Microcapsules, vascular networks, dissolved thermoplastics, and reversible interactions can be used to give polymer matrix composites with self-healing properties. Recent improvements, particularly epoxy employed as a matrix phase in carbon fiber-reinforced polymers, are chosen and examined in terms of their repair mechanisms, validation testing methods, and any other attributes that might be relevant in aerospace applications. Extrinsic self-healing, which is pioneered in this field, paves the way for more modern approaches that take advantage of intrinsic self-molecular healing pathways. The latter appears to be the more promising self-healing carbon fiber-reinforced polymers in the long run. Self-healing carbon fiber-reinforced polymers are critical for increasing aircraft fatigue, impact, and corrosion resistance. Complex aviation composite geometries that are formerly made using time-consuming and expensive techniques (e.g. autoclave) can now be made utilizing simpler (and hence less expensive) processes, such as co-electrospinning, vacuum-assisted injection molding, or hand-lay up molding. Engines, fuselages, and aerostructures, as well as anticorrosion coatings, have profited from the usage of self-healing carbon fiber-reinforced polymers. Each area demands its own set of processes for improvement. Anyhow, carbon fiber-reinforced polymers face some problems of disposal and recycling.