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首页> 外文期刊>Journal of Industrial Textiles >Improving EMI shielding effectiveness and dielectric properties of polyaniline-coated polyester fabric by effective doping and redoping procedures
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Improving EMI shielding effectiveness and dielectric properties of polyaniline-coated polyester fabric by effective doping and redoping procedures

机译：通过有效的掺杂和重掺杂程序提高EMI屏蔽效果和聚苯胺涂层聚酯织物的介电性能

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Conductive polymers with their medium level of conductivity are synthetic materials that can be used as electromagnetic wave absorber. In this work, the effect of aging and washing on the surface resistivity and also the influence of efficient doping and redoping procedure on the dielectric properties and electromagnetic radiation shielding of uniformly polyaniline coated polyester fabric are investigated in the X-band frequency range. They can affect the shielding effectiveness by changing the surface resistivity and dielectric permittivity. It is found that lightweight, flexible, and thin polyaniline-coated polyester fabric sample prepared in 1:1:7 monomer:oxidant:dopant molar ratio and redoped with concentrated HCl vapor shows the highest transmission loss (53-43%) in 8.2-12.4 GHz. Compared to single layer, double and triple layer samples attenuated 71-61% and 83-77% of incident wave, respectively. Absorption was the dominant shielding mechanism. It is also demonstrated that the increment of surface resistivity due to washing of samples is compensated by the redoping process.
机译：具有中等导电率的导电聚合物是可用作电磁波吸收剂的合成材料。在这项工作中，研究了在X波段频率范围内，老化和洗涤对表面电阻率的影响，以及有效的掺杂和重掺杂过程对均聚聚苯胺涂层的聚酯织物的介电性能和电磁辐射屏蔽的影响。它们可以通过改变表面电阻率和介电常数来影响屏蔽效果。发现以1：1：7单体：氧化剂：掺杂剂摩尔比制备并用浓HCl蒸气重配的轻质，柔性和薄聚苯胺涂层聚酯织物样品显示出8.2-的最高传输损耗（53-43％） 12.4 GHz。与单层相比，双层和三层样品分别衰减了入射波的71-61％和83-77％。吸收是主要的屏蔽机制。还证明了通过重洗过程补偿了由于样品洗涤而引起的表面电阻率的增加。

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