Wang Shijun, Li Diansen, Zhou Yue, Jiang Lei
Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology, Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China.
Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China.
ACS Nano. 2020 Jul 28;14(7):8634-8645. doi: 10.1021/acsnano.0c03013. Epub 2020 Jul 9.
The increasing demand for wearable electronics and the intensification of electromagnetic pollution have boosted the exploration of high-performance flexible microwave absorption (MA) materials. Herein, the hierarchical TiCT MXene/Ni chain/ZnO array hybrid nanostructures are rationally constructed on cotton fabric for acquiring enhanced MA performance and durable self-cleaning ability. Based on the high dielectric loss capacity of MXenes and ZnO arrays, by controlling dip-coating numbers of Ni chains, the magnetic loss can be manipulated to modulate the impedance matching, reflection loss (RL), and effective absorption bandwidth (EAB, the bandwidth of RL < -10 dB). The minimum RL value of the designed fabric can reach -35.1 dB at 8.3 GHz with a thickness of 2.8 mm, and its EAB can cover the whole X-band with only a 2.2 mm thickness. In addition, the designed fabric also exhibits superior liquid repellency and durable self-cleaning ability due to the combination of the hybrid nanostructures and a superhydrophobic coating. This work provides an insight for rational design of textile-based MA materials, showing potential applications in flexible and wearable functional electronics.
可穿戴电子产品需求的不断增长以及电磁污染的加剧，推动了对高性能柔性微波吸收（MA）材料的探索。在此，通过合理构建分级结构的TiCT MXene/Ni链/ZnO阵列混合纳米结构，使其负载于棉织物上，以获得增强的微波吸收性能和持久的自清洁能力。基于MXene和ZnO阵列的高介电损耗能力，通过控制Ni链的浸涂次数，可以调节磁损耗，从而调整阻抗匹配、反射损耗（RL）和有效吸收带宽（EAB，RL < -10 dB的带宽）。所设计织物的最小RL值在8.3 GHz、厚度为2.8 mm时可达-35.1 dB，其EAB在厚度仅为2.2 mm时即可覆盖整个X波段。此外，由于混合纳米结构与超疏水涂层的结合，所设计的织物还具有优异的拒液性和持久的自清洁能力。这项工作为基于纺织品的微波吸收材料的合理设计提供了思路，展示了其在柔性和可穿戴功能电子器件中的潜在应用。
