Polymer‐Based Composite Fibers for Electromagnetic Interference Shielding

ABSTRACT Polymer‐based electromagnetic interference (EMI) shielding composite fibers have gradually become a research hotspot in the field of EMI shielding due to their advantages of being lightweight, corrosion‐resistant, highly flexible, and easily weavable. This review focuses on the preparation strategies of polymer‐based EMI shielding composite fibers, systematically reviewing the research progress and characteristics of wet spinning, electrospinning, and other methods such as chemical deposition and template methods. Starting from the structural design principles of fibers, it specifically analyzes the construction strategies, preparation methods, and development status of solid, core–shell, and hollow structures of polymer‐based EMI shielding composite fibers. It summarizes the effects of different preparation processes and structural morphologies on the EMI shielding performance and mechanical properties of polymer‐based EMI shielding composite fibers, identifies key scientific and technical issues that need to be resolved in current preparation methods, and looks ahead to the future development trends of polymer‐based EMI shielding composite fibers. This review aims to provide theoretical guidance for the innovation of preparation strategies and performance improvement of polymer‐based EMI shielding composite fibers, promote their applications in aerospace, smart wearables, medical electronics, and other fields, and open up new directions for the development of electromagnetic protection materials.