Construction and application of flexible electromagnetic interference shielding films with multifunctionality

Abstract

With the rapid development of 5G communication technology, the research on ultra-thin flexible electromagnetic interference (EMI) shielding materials has become a hot topic. The next generation of devices is moving towards miniaturization, intelligence, and high integration. Considering complex application scenarios, single function EMI shielding films no longer meet cutting-edge industrial needs. In this paper, emerging demands and applications for flexible EMI shielding films with multifunctionality, including transparency, thermal conductivity, joule heating or photothermal response, hydrophobicity and self-cleaning property, corrosion resistance, fire retardancy, pressure sensing, ultra-high mechanical properties, and excellent durability were comprehensively summarized. In addition, advanced strategies for implementing functional integrity of EMI shielding materials were proposed. The fabrication methods, structures, functions, and mechanisms of the latest research progress of multifunctional flexible EMI shielding films were elucidated in detail. Key challenges on multifunctional flexible EMI shielding films are presented followed by some future perspectives.