Electromagnetic interference (EMI) and radiation of electronic devices are ubiquitous, which are potentially hazardous to the normal operation of electronic equipment and human health. MXenes are extremely attractive in the preparation of EMI shielding materials due to their excellent metallic conductivity and tunable surface chemistry. Herein, by virtue of the designed nanostructure and regulation of interface interactions, we fabricated flexible Fe₃O₄@Ti₃C₂T_x MXene/3,4-dihydroxyphenylacetic acid (DOPAC)-epoxidized natural rubber (ENR) elastomers (FMDE) with 3D segregated interconnected structures. The elaborately designed metal-ligand coordination crosslinking between Fe₃O₄ nanoparticles and DOPAC ligand molecules provides strong interfacial interactions, resulting in significantly reinforced mechanical properties. Compared with Ti₃C₂T_x/ENR elastomers, the maximum tensile strength and toughness of FMDE are elevadted by ∼306% and 475%, respectively. Moreover, the 3D segregated conductive network constructed by Fe₃O₄@Ti₃C₂T_x nanoflakes resulted from volume exclusion effect of ENR latex and the introduction of magnetic Fe₃O₄ nanoparticles with enhanced electromagnetic wave absorption greatly improved the EMI shielding performance of FMDE, exhibiting an excellent EMI shielding effectiveness of up to 58 dB in the X band (8.2–12.4 GHz) and stable EMI shielding capability during repeated deformations. This work provides a promising strategy for the design and manufacture of novel flexible EMI shielding materials.

电子设备的电磁干扰（EMI）和辐射无处不在，这可能对电子设备的正常运行和人体健康造成危害。由于MXene具有出色的金属导电性和可调节的表面化学性质，因此在EMI屏蔽材料的制备中极具吸引力。在此，通过设计的纳米结构和界面相互作用的调节，我们制备了柔性的Fe ₃ O ₄ @Ti ₃ C ₂ T _x MXene / 3,4-二羟基苯基乙酸（DOPAC）-环氧化天然橡胶（ENR）弹性体（FMDE） 3D隔离的互连结构。精心设计的Fe ₃ O之间的金属-配体配位交联_4个纳米粒子和DOPAC配体分子提供了强大的界面相互作用，从而显着增强了机械性能。与Ti ₃ C ₂ T _x / ENR弹性体相比，FMDE的最大拉伸强度和韧性分别降低了约306％和475％。此外，由Fe ₃ O ₄ @Ti ₃ C ₂ T _x纳米薄片构成的3D隔离导电网络是由于ENR胶乳的体积排阻效应和磁性Fe ₃ O ₄的引入所致。具有增强的电磁波吸收能力的纳米颗粒极大地改善了FMDE的EMI屏蔽性能，在X波段（8.2-12.4 GHz）上具有高达58 dB的出色EMI屏蔽效果，并且在反复变形期间具有稳定的EMI屏蔽能力。这项工作为新型柔性EMI屏蔽材料的设计和制造提供了一种有希望的策略。