Guo Jinghe, Wang Yanxiang, Wang Lanzhou, Ding Bohan, Wang Yongbo, Sun Yue, Dai Shichao, Wang Donglong, Bi Shishuai
Carbon Fiber Engineering Research Center, School of Materials Science and Engineering, Shandong University, Jinan 250061, China.
School of Foreign Languages and Literature, Shandong University, Jinan 250100, China.
Materials (Basel). 2024 Nov 6;17(22):5427. doi: 10.3390/ma17225427.
With the increasing demand for effective electromagnetic wave (EMW) absorbers due to the proliferation of electronic devices and 5G communication systems, traditional wave-absorbing materials can no longer meet the current requirements. Thus, this research introduces a three-dimensional (3D) composite material consisting of PMMA@Mxene@Co₃O₄ microspheres, prepared through in situ self-assembly and hydrothermal growth. The strong electrical conductivity of Mxene, combined with the magnetic loss of Co₃O₄, ensures enhanced dielectric-magnetic synergy, leading to excellent EMW absorption. The study investigates the influence of varying Co₃O₄ content on the electromagnetic properties of the composite. Experimental results show that the optimal sample, with a thickness of 2.5 mm, achieves a minimum reflection loss (RL) of -52.88 dB at 6.88 GHz and an effective absorption bandwidth (EAB) of 5.28 GHz. This work highlights the potential of 3D PMMA@Mxene@Co₃O₄ composites as high-performance microwave absorbers, providing a promising solution to EMW pollution. The findings offer valuable insights into material design strategies, demonstrate a promising pathway for developing lightweight, high-performance EMW absorbing materials by optimizing impedance matching and utilizing advanced microstructure design techniques.
随着电子设备和5G通信系统的激增，对有效电磁波（EMW）吸收剂的需求不断增加，传统的吸波材料已无法满足当前要求。因此，本研究引入了一种由PMMA@Mxene@Co₃O₄微球组成的三维（3D）复合材料，通过原位自组装和水热生长制备而成。Mxene的强导电性与Co₃O₄的磁损耗相结合，确保了增强的介电-磁协同作用，从而实现了优异的EMW吸收。该研究考察了不同Co₃O₄含量对复合材料电磁性能的影响。实验结果表明，厚度为2.5 mm的最佳样品在6.88 GHz时实现了-52.88 dB的最小反射损耗（RL）和5.28 GHz的有效吸收带宽（EAB）。这项工作突出了3D PMMA@Mxene@Co₃O₄复合材料作为高性能微波吸收剂的潜力，为EMW污染提供了一个有前景的解决方案。这些发现为材料设计策略提供了有价值的见解，通过优化阻抗匹配和利用先进的微观结构设计技术，展示了开发轻质、高性能EMW吸收材料的一条有前景的途径。
