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Electromagnetic absorption efficiency of polypropylene/montmorillonite/polypyrrole nanocomposites

机译:聚丙烯/蒙脱土/聚吡咯纳米复合材料的电磁吸收效率

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摘要

Electrical conductivity and dielectric properties have been studied for two types of polypropylene composites containing conducting phase. One type comprised conducting polymer-polypyrrole while the second employed montmorillonite particles coated with conducting polymer-polypyrrole. Composites' shielding properties were estimated based on their previously determined electromagnetic characteristics. Unlike a basic binary polypropylene/polypyrrole composite, the ternary sample with multicomponent montmorillonite particles exhibits higher dielectric losses and consequently a significant rise in shielding efficiency in the radio-frequency range of 0.1-1.5 GHz. This stems from the presence of highly polarizable multicomponent montmorillonite anisotropic lamellar particles with polypyrrole conducting layer, which considerably increases the complex permittivity of the composite. (C) 2010 Elsevier Ltd. All rights reserved.
机译:已经研究了两种包含导电相的聚丙烯复合材料的电导率和介电性能。一种类型包括导电聚合物-聚吡咯,而第二种类型使用蒙脱石颗粒涂覆了导电聚合物-聚吡咯。复合材料的屏蔽性能是根据其先前确定的电磁特性估算的。与基本的二元聚丙烯/聚吡咯复合材料不同,具有多组分蒙脱土颗粒的三元样品表现出更高的介电损耗,因此在0.1-1.5 GHz的射频范围内屏蔽效率显着提高。这是由于存在具有聚吡咯导电层的高度可极化的多组分蒙脱土各向异性层状颗粒,从而大大提高了复合材料的复介电常数。 (C)2010 Elsevier Ltd.保留所有权利。

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