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首页> 外文期刊>ACS applied materials & interfaces >Enhanced X-Band Electromagnetic-Interference Shielding Performance of Layer-Structured Fabric-Supported Polyaniline/Cobalt-Nickel Coatings
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Enhanced X-Band Electromagnetic-Interference Shielding Performance of Layer-Structured Fabric-Supported Polyaniline/Cobalt-Nickel Coatings

机译：层结构织物支持的聚苯胺/钴镍涂层的增强型X波段电磁干扰屏蔽性能

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摘要

Despite tremendous efforts, fabrication of lightweight conductive fabrics for high-performance X-band electromagnetic-interference (EMI) shielding remains a daunting techtical challenge. We herein report ail ingenious and efficient strategy to deposit polyaniline/cobalt-nickel (PANI/Co-Ni) coatings onto lyocell fabrics that involves consecutive steps of in situ polymerization and electroless plating. The PANT Co-Ni ternary-component system successfully induced a synergistic effect from BM wave-absorption and EM wave reflection and, moreover, upgraded the match level between magnetic loss and dielectric loss. By the judicious control of polymerization cycles and plating time, low-weight fabric supported PANI/Co-Ni composites (with PANI and Co-Ni loading of 2.86 and 3.99 mg.cm(-2), respectively) were prepared, which displayed relatively high EMI shielding effectiveness (SE) (33.95-46.22 dB) when compared to their single peers (PANI-coated fabric and Co-Ni-coated fabric) or even the sum of them. Inspired by the so-called "1 + 1 > 2" phenomenon, here We demonstrated that there was an EMI SE enhancement effect in this conductive polymer/metal system that may be associated with interphase chemical and/or physical interactions. Further analysis revealed that this EMI SE enhancement effect was evident under circumstances of relatively low metal content and became weak with the increase of metal content. The mechanisms involved were interpreted through a series of fundamental measurements, including Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), and vector network analysis (VNA). The linkage between PANI and Co-Ni coatings was in the form of Co-N/Ni-N, which mimics the atomic configuration occurring in cobalt porphyrins. The Co-N/Ni-N configuration strengthened the interphase adhesion and thus resulted in shielding fabrics with high durability for practical applications.
机译：尽管努力巨大努力，用于高性能X波段电磁干扰（EMI）屏蔽的轻质导电织物的制造仍然是一个艰巨的技术挑战。在此报告的是将聚苯胺/钴 - 镍（PANI / CO-NI）涂层沉积在洛氏纤维织物上的巧妙和有效的策略上，其涉及在原位聚合和化学镀的连续步骤中。裤子CO-NI三元组件系统成功地诱导了BM波浪吸收和EM波反射的协同作用，而且，升级磁力损耗和介电损耗之间的匹配水平。通过对聚合循环和电镀时间的明智控制，制备低重量织物的PANI / CO-Ni复合材料（分别具有2.86和3.99mg.cm（-2）的PANI和CO-NI负载），相对显示与其单一对等体（PANI涂层织物和共注织物）或甚至它们的总和相比，高EMI屏蔽有效性（33.95-46.22dB）。灵感来自所谓的“1 + 1> 2”现象，在这里，我们证明了该导电聚合物/金属系统中存在EMI SE增强效果，其可以与差异化学和/或物理相互作用相关联。进一步的分析表明，在相对低的金属含量的情况下，该EMI SE增强效果明显明显，并且随着金属含量的增加而变弱。所涉及的机制通过一系列基本测量来解释，包括傅里叶变换红外光谱（FTIR），X射线光电子能谱（XPS），X射线衍射（XRD），场发射扫描电子显微镜（FE-SEM），和矢量网络分析（VNA）。 PANI和CO-NI涂层之间的连锁为CO-N / Ni-N的形式，其模拟了在钴卟啉中发生的原子构型。 CO-N / NI-N构造强化了间粘连，从而导致具有高耐久性的屏蔽织物，用于实际应用。

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