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Conductive layer-based multifunctional structural composites for electromagnetic interference shielding

机译：用于电磁干扰屏蔽的导电层的多功能结构复合材料

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The doped polyaniline (PANI) mixed with divinylbenzene (DVB) as a crosslinking thermoset polymer has been presented to exemplify as a structural electromagnetic interference (EMI) shielding material. Both theoretical and experimental analysis was conducted to analyze the shielding mechanisms. The effects of shielding layer thickness were studied to optimize the EMI shield properties. Preliminary studies reveal that the maximum EMI shielding effectiveness (SE) and electrical conductivity values of similar to 20 dB in the X-band (8.2-12.4 GHz) and 100 S/m, respectively, have been reached in the case of 1 mm thick PANI-based thermoset. It is also found from the experimental results that; absorption mechanism was the primary shielding mechanism for this material due to high conductivity. Further, both dielectric constant and permeability were estimated using Nicolson-Ross-Weir (NRW) algorithm and the S-parameters obtain from the vector network analyzer (VNA) to understand and correlate the shielding mechanisms. Finally, the PANI-based conducive layer successfully installs on structural fiber-reinforced composites to demonstrate its application as a self-EMI shielding structural composite materials. Both glass fiber reinforced polymer (GFRP) and carbon fiber-reinforced polymer (CFRP) composites were able to shield the EMI radiation with a maximum SE value of 17 and 45 dB, while keeping the layer thickness of 1 mm.
机译：已经介绍了与二乙烯基苯（DVB）混合作为交联热固性聚合物的掺杂聚苯胺（PANI）以举例说明是结构电磁干扰（EMI）屏蔽材料。进行了理论和实验分析，以分析屏蔽机构。研究了屏蔽层厚度的影响，以优化EMI屏蔽性能。初步研究表明，在X波段（8.2-12.4GHz）和100 s / m中，在1毫米厚的情况下，分别在X波段（8.2-12.4GHz）和100 s / m中的最大EMI屏蔽效能（SE）和电导率值。基于PANI的热固性。还发现了实验结果;吸收机制是该材料由于高导电性的主要屏蔽机构。此外，使用Nicolson-Ross-Weir（NRW）算法估计介电常数和渗透性，并且从向量网络分析器（VNA）获得的S参数以理解和相关屏蔽机构。最后，基于PANI的有用层在结构纤维增强复合材料上成功安装，以证明其应用作为自EMI屏蔽结构复合材料。玻璃纤维增​​强聚合物（GFRP）和碳纤维增强聚合物（CFRP）复合材料都能够以最大SE值为17和45dB屏蔽EMI辐射，同时保持1mm的层厚度。

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