Recent advances in chemical crosslinking of ceramic-coated carbon nanotubes for enhanced electromagnetic interference shielding

Electromagnetic interference (EMI) shielding is critical for the safety and stability of aircraft and defense system operations. Ineffective EMI shielding can lead to malfunctions and catastrophic failures. This review focuses on advances in chemical crosslinking strategies for carbon nanotube (CNT)–ceramic composites, which enhance mechanical strength and EMI shielding efficiency. By optimizing interfacial interactions through various techniques, a uniform ceramic coating on CNTs is achieved, overcoming challenges related to CNTs' inertness and tendency to agglomerate. Appropriate crosslinking significantly improves CNT composite strength and durability by forming strong intermolecular bonds, ensuring stable structural integrity under extreme conditions. Additionally, integrating CNTs with magnetic particles and MXenes yields multilayered coatings with superior EMI shielding, minimal electromagnetic wave reflection, lighter weight, and enhanced reliability. The lightweight, thermally stable, and chemically resistant nature of these composites makes them ideal for aerospace and defense applications, demonstrating the importance of chemical crosslinking in developing advanced EMI shielding solutions.