Integrating Thermal, EMI Shielding, and Mechanical Properties in Carbon Fiber/Epoxy Resin Composites via Interface‐Layup Synergistic Design

作者：Jiamei Luo, Xue Yi, Xueqin Yang, Chenxi Yang, Minqiang Jiang, Liying Zhang, Yong Liu, Hui Zhang, Jianyong Yu · 发表于：Advanced Functional Materials · 年份：2025 · DOI：10.1002/adfm.202513660 · 被引用次数：11 · 研究领域：Electromagnetic wave absorption materials、Flame retardant materials and properties、Dielectric materials and actuators

Abstract Next‐generation aerospace systems require carbon fiber/epoxy resin (CF/EP) composites that simultaneously deliver high thermal conductivity, electromagnetic interference (EMI) shielding, and mechanical properties, yet conventional designs face inherent property trade‐offs. To address this challenge, an interface‐layup synergistic engineering strategy is proposed. A 3D CF felt architecture is synthesized through in situ hydrothermal growth of MnO 2 microporous transition layers, augmented by Fe nanoparticle deposition via chemical reduction. This engineered framework is subsequently integrated with CF cloths, forming a multiscale CF/EP composite through vacuum‐assisted resin infusion. The MnO 2 transition interface functions as a phonon transmission mediator, preserving modulus continuity across interfaces while reducing thermal boundary resistance through lattice vibration coupling. Concurrently, Fe nanoparticles create electron transport networks, thus suppressing phonon scattering. This coordinated mechanism achieves exceptional directional thermal conductivities ( к ⊥ = 0.82 W m −1 K −1 ; к // = 4.41 W m −1 K −1 ) coupled with superior EMI shielding effectiveness (SE = 69.85 dB). Through strategic layering optimization, the developed composite exhibits simultaneous mechanical enhancement with an interlaminar shear strength (ILSS) of 70.18 MPa and flexural strength of 1074.95 MPa, corresponding to 41.89% and 27.23% improvements over conventional CF/EP composites. T...