With the rapid development of 5G communication technology and wearable electronic devices, the demand for low-reflection electromagnetic interference (EMI) shielding materials is becoming increasingly urgent. In this work, reduced graphene oxide-MXene (rGMH) @FeNi/epoxy EMI shielding composites with a regular honeycomb structure were successfully prepared by the combination of surface functionalization modification, sacrificial template, and freeze-drying. The effects of magnetic FeNi alloy particle loading mode and loading amount on the EMI shielding performance of composites were investigated. The results show that rGMH@FeNi/epoxy EMI shielding composites have the highest EMI shielding effectiveness (EMI SE) and the lowest reflection shielding effectiveness when magnetic FeNi alloy particles are loaded only on the graphene skeleton. In this composite, the EMI SE value of the composite is 61 dB when the rGMH@FeNi mass fraction is 5.4 wt% (f-FeNi mass fraction is 0.9 wt%), which is 4.7 times that of the blended rGO/MXene/FeNi/ epoxy resin composite (13 dB) with the same mass fraction. At the same time, the rGMH@FeNi/epoxy composite has excellent thermal stability (heat-resistance index of 190.3 °C) and mechanical properties (energy storage modulus of 8606.7 MPa). These polymer-based EMI shielding composites with excellent EMI shielding properties and low reflection effectiveness have great potential in the protection of high-power, portable and wearable electronic devices against electromagnetic pollution.

中文翻译：

---

构建具有规则蜂窝结构的 rGO-MXene@FeNi/环氧树脂复合材料，用于高效电磁干扰屏蔽


随着 5G 通信技术和可穿戴电子设备的快速发展，对低反射电磁干扰 （EMI） 屏蔽材料的需求越来越迫切。本工作采用表面功能化改性、牺牲模板和冷冻干燥相结合的方法，成功制备了具有规则蜂窝结构的还原氧化石墨烯-MXene （rGMH） @FeNi/环氧 EMI 屏蔽复合材料。研究了磁性 FeNi 合金颗粒负载模式和负载量对复合材料 EMI 屏蔽性能的影响。结果表明，当磁性 FeNi 合金颗粒仅负载在石墨烯骨架上时，rGMH@FeNi/环氧 EMI 屏蔽复合材料具有最高的 EMI 屏蔽效能 （EMI SE） 和最低的反射屏蔽效能。在该复合材料中，当rGMH@FeNi质量分数为 5.4 wt%（f-FeNi 质量分数为 0.9 wt%）时，复合材料的 EMI SE 值为 61 dB，是相同质量分数的 rGO/MXene/FeNi/环氧树脂混合复合材料 （13 dB） 的 4.7 倍。同时，rGMH@FeNi/环氧树脂复合材料具有优异的热稳定性（耐热指数为 190.3 °C）和机械性能（储能模量为 8606.7 MPa）。这些聚合物基 EMI 屏蔽复合材料具有优异的 EMI 屏蔽性能和低反射效果，在保护大功率、便携式和可穿戴电子设备免受电磁污染方面具有巨大潜力。