Microwave absorption analysis of graphene-based hybrid nanocomposites: experimental, numerical and component level testing studies

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES

Plastics, Rubber and Composites Pub Date : 2022-01-06 DOI:10.1080/14658011.2021.2021839

B. Santhosi, K. Ramji, N. M. Rao, Dora Nagaraju, M. Naidu

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引用次数: 0

Abstract

ABSTRACT An effective nanocomposite-based microwave absorber made of polyurethane /graphene/glass/epoxy with different weight percentages of graphene (0 to 2.5 wt%) is proposed. Microstructural characterization of samples is done with the help of XRD, FESEM and TEM. Graphene crystalline structure maximum diffraction peak is observed at 26o associated interlayer d-spacing is 0.341 nm (plane 002), the same affirmed with TEM analysis. Graphene flake structure is identified from FESEM results. Firstly, experimental investigation is done using wave guide setup, later numerical model is developed using RF module in COMSOL. The experimental results reveal more than 90% absorption capability in broad bandwidth i.e., 3 GHz and maximum Reflection loss -35.9 dB is attained at 12.1 GHz. Also, maximum shielding effectiveness is -47 dB for 2.5 wt% PU/graphene composite due to its semi conduction. Further, a composite concrete block using 2.5 wt% PU/graphene is analysed using numerical model for the application of anechoic.

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石墨烯基杂化纳米复合材料的微波吸收分析:实验、数值和组分水平测试研究

提出了一种有效的纳米复合材料微波吸收剂，由不同重量百分比的石墨烯(0 ~ 2.5 wt%)组成的聚氨酯/石墨烯/玻璃/环氧树脂。利用XRD、FESEM和TEM对样品进行了微观结构表征。在26o处观察到石墨烯晶体结构的最大衍射峰，相关层间d间距为0.341 nm(002面)，TEM分析也证实了这一点。通过FESEM分析，确定了石墨烯的片状结构。首先利用波导装置进行了实验研究，然后利用COMSOL中的射频模块建立了数值模型。实验结果表明，在3ghz宽带宽下，其吸收能力超过90%，在12.1 GHz处反射损耗达到最大-35.9 dB。此外，由于其半导性，2.5 wt% PU/石墨烯复合材料的最大屏蔽效率为-47 dB。此外，使用数值模型对使用2.5 wt% PU/石墨烯的复合混凝土块进行了消声应用分析。

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来源期刊

Plastics, Rubber and Composites 工程技术-材料科学：复合

CiteScore

4.10

自引率

0.00%

发文量

审稿时长

4 months

期刊介绍： Plastics, Rubber and Composites: Macromolecular Engineering provides an international forum for the publication of original, peer-reviewed research on the macromolecular engineering of polymeric and related materials and polymer matrix composites. Modern polymer processing is increasingly focused on macromolecular engineering: the manipulation of structure at the molecular scale to control properties and fitness for purpose of the final component. Intimately linked to this are the objectives of predicting properties in the context of an optimised design and of establishing robust processing routes and process control systems allowing the desired properties to be achieved reliably.