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首页> 外文期刊>Journal of Applied Polymer Science >Microwave absorption properties of double-layer nanocomposites based on polypyrrole/natural rubber
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Microwave absorption properties of double-layer nanocomposites based on polypyrrole/natural rubber

机译：基于聚吡咯/天然橡胶的双层纳米复合材料的微波吸收性能

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摘要

Thin flexible double-layer microwave absorbers have been fabricated based on polypyrrole (PP)/natural rubber (NR) nanocomposites and their reflection loss characteristics were studied in the range of 8-18 GHz. The PP-NR matrix was prepared from PP and NR in the ratio of 15:85. The polymers used in this work not only serve as the matrix but also improve the microwave absorption properties. The first layer or impedance matching layer which is comprised of graphite, Fe3O4, and TiO2 nanoparticles in PP-NR transmits the electromagnetic (EM) wave without reflection. The second layer which is made up of PP-NR filled with Fe3O4 disperses the EM wave energy. The design of a double-layer nanocomposite is a method to match the wave impedance, enhance wave absorption ability, and broaden the absorption frequencies. In order to achieve high absorption properties, the EM parameters such as permittivity, permeability, and thickness were controlled precisely according to quarter-wave plate. The morphology, absorption properties, scattering parameters, thermal and wetting characteristics of double-layer nanocomposites were investigated. The minimum reflection loss (R-L) was -32 dB at 12.1 GHz and the absorbing bandwidth in which the R-L-10 dB was 9 GHz for optimum specimen with 2 mm thickness. For this specimen, the contact angle was equal to 118.7 degrees with water as the liquid. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46565.
机译：薄的柔性双层微波吸收器基于聚吡咯（PP）/天然橡胶（NR）纳米复合材料制造，并在8-18GHz的范围内研究了它们的反射损耗特性。 PP-NR基质以15:85的比例从PP和NR制备。在这项工作中使用的聚合物不仅用作基质，而且还改善微波吸收性能。由PP-NR中的石墨，Fe3O4和TiO2纳米颗粒组成的第一层或阻抗匹配层在没有反射的情况下透射电磁（EM）波。由PP-NR填充用Fe3O4的PP-NR组成的第二层分散了EM波能量。双层纳米复合材料的设计是匹配波阻抗，增强波吸收能力并拓宽吸收频率的方法。为了实现高吸收性，根据四分之一波片精确地控制诸如介电常数，渗透性和厚度的EM参数。研究了双层纳米复合材料的形态，吸收性能，散射参数，热和润湿特性。最小反射损耗（R-1）为-32dB，在12.1GHz和吸收带宽，其中R-1 <-10dB为9GHz，用于最佳样品，厚度为2mm。对于该样品，接触角与水作为液体等于118.7度。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46565。

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