Chainlike nickel nanostructures were prepared by using an efficient wet chemical method, and Ni/polyvinylidene fluoride (PVDF) composites were fabricated with a rotational orientation in a static magnetic field. The oriented magnetic nanochains in the composites show a uniform distribution without significant agglomeration, which favors the impedance matching and attenuation ability of the absorbents. The Ni/PVDF composite with only a 20 wt % loading of oriented nickel chains exhibits a minimum reflection loss (RL) value of −36.8 dB at 23.2 GHz from 18 to 26.5 GHz, while an optimal RL of −37.3 dB is obtained at 35.6 GHz with a 10 wt % loading from 26.5 to 40 GHz. Moreover, an excellent electromagnetic interference shielding effectiveness (35 dB) is achieved with an oriented filler loading of 30 wt %. Rotational orientation is an effective strategy for magnetic materials to achieve enhancements in both microwave absorption and shielding performance.

中文翻译：

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具有可调磁性的定向镍链的纳米复合材料，用于高性能宽带微波吸收

使用高效的湿化学方法制备了链状镍纳米结构，并在静态磁场中以旋转方向制备了Ni /聚偏二氟乙烯（PVDF）复合材料。复合材料中取向的磁性纳米链显示出均匀的分布，而没有明显的团聚，这有利于吸收剂的阻抗匹配和衰减能力。仅含20 wt％负载的取向镍链的Ni / PVDF复合材料在18至26.5 GHz的23.2 GHz处表现出最小反射损耗（RL）值为-36.8 dB，而在35.6处可获得-37.3 dB的最佳RL GHz，在26.5至40 GHz之间具有10 wt％的负载。此外，以30wt％的定向填料负载获得了优异的电磁干扰屏蔽效果（35dB）。