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Polypyrrole functionalized polyester needlepunched nonwoven fabrics for electro-magnetic interference shielding

机译：聚吡咯官能化聚酯针刺无纺布用于电磁干涉屏蔽

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摘要

Development of electro-magnetic shield is an important research area since few decades to protect electronic devices and even human beings from harmful effects of electro-magnetic rays. Textile based flexible shields are also developed as functionalized materials for this purpose. In this work, needlepunched nonwoven textile based electro-conductive fabric is prepared by in-situ chemical polymerization of pyrrole and their effectiveness as electro-magnetic shield is explored. 3(3) Box-Behnken design is used to investigate the influence of manufacturing process parameters of neddlepunched nonwoven fabric such as fabric gsm, punching density and depth of needle penetration on the polypyrrole add-on, surface resistivity and electro-magnetic shielding effectiveness. Surface resistivity as low as 18 (with 16.28% polypyrrole add-on) is obtained for a typical composite fabric. The shielding effectiveness of this fabric is found to be 20.07 dB at 4 GHz frequency. It has been found that the primary mechanism of the shielding is the absorption of electro-magnetic rays into these composite fabrics rather than reflection from their surface. POLYM. COMPOS., 39:3696-3704, 2018. (c) 2017 Society of Plastics Engineers
机译：电磁屏蔽的开发是一种重要的研究领域，自几十年来保护电子设备甚至人类免受电磁光线的有害影响。为此目的，纺织基于柔性屏蔽也被开发为功能化材料。在这项工作中，通过原位的吡咯化学聚合来制备针合的非织造织物基的电导织物，并探讨了它们作为电磁屏蔽的效果。 3（3）Box-Behnken设计用于探讨织物GSM，冲压密度和针刺深度，表面电阻率和电磁屏蔽效果的制造工艺参数的影响。对于典型的复合织物，获得低至18（具有16.28％的聚吡咯加载）的表面电阻率。该织物的屏蔽有效性在4 GHz频率下被发现为20.07 dB。已经发现，屏蔽的主要机理是将电磁光线吸收到这些复合织物中而不是从它们的表面的反射。聚合物。 Compos。，39：3696-3704,2018。（c）2017年塑料工程师协会

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