Nanostructured composites based on carbon nanotubes and epoxy resin for use as radar absorbing materials
Nanostructured composites based on carbon nanotubes and epoxy resin for use as radar absorbing materials
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DOI：
10.1590/s1516-14392013000600012
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发表时间：
2013-01-01
期刊：
影响因子：
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通讯作者：
Costa, Michelle Leali
中科院分区：
文献类型：
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作者：
Silva, Valdirene Aparecida;Folgueras, Luiza de Castro;Costa, Michelle Leali
纳米结构聚合物复合材料为多功能材料开辟了新的前景。特别是，碳纳米管（CNTs）提出了潜在的应用，以提高复合材料的机械和电气性能与航空航天应用。环氧树脂与多壁碳纳米管的结合导致了具有增强的电磁性能的新功能材料。这项工作的目的是处理雷达吸收材料的基础上配方含有不同量的碳纳米管在环氧树脂基体。为了达到这一目标，确定了树脂基质中CNT的适当浓度。通过扫描电子显微镜、流变学、热分析和8.2至12.4 GHz频率范围内的反射率分析对加工后的结构进行了表征。仅使用0.5%（w/w）的CNT，微波衰减高达99.7%，表明这些材料在与低添加剂浓度相关的性能方面具有优势。
Nanostructured polymer composites have opened up new perspectives for multifunctional materials. In particular, carbon nanotubes (CNTs) present potential applications in order to improve mechanical and electrical performance in composites with aerospace application. The combination of epoxy resin with multiwalled carbon nanotubes results in a new functional material with enhanced electromagnetic properties. The objective of this work was the processing of radar absorbing materials based on formulations containing different quantities of carbon nanotubes in an epoxy resin matrix. To reach this objective the adequate concentration of CNTs in the resin matrix was determined. The processed structures were characterized by scanning electron microscopy, rheology, thermal and reflectivity in the frequency range of 8.2 to 12.4 GHz analyses. The microwave attenuation was up to 99.7%, using only 0.5% (w/w) of CNT, showing that these materials present advantages in performance associated with low additive concentrations.