Thermal and microwave-absorbing properties of doped polyaniline–epoxy nanocomposites for stealth applications

IF 0.7 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

International Journal of Materials Research Pub Date : 2023-08-11 DOI:10.1557/s43578-023-01125-3

V. Pratap, Aasim Hussain, R. Katiyar, A. Soni, Mohit Katiyar, K. Agarwal, H. Baskey, A. Dubey, S. Abbas, R. Nath

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Abstract

The thermal properties of polymeric nanocomposites can be examined using TGA and DSC techniques, while dielectric properties can be examined through simulated scattering (S11, S12, S21, and S22) parameters. Polyaniline (PAni) nanopowder was synthesized using chemical oxidative polymerization techniques. Consequently, the crystallite size and morphology of the synthesized powder were examined using the XRD, TEM, and FESEM techniques. Further, a series of polymeric nanocomposites was developed via wet mixing and compressor molding techniques for various volume percentages (54.0, 57.5, 60.1, and 61.7 vol%) of synthesized powder within PAni/epoxy composites. Consequently, dielectric and absorbing properties have been measured using a vector network analyzer and its software module. The computed complex permittivity data were used to evaluate the absorption for different thicknesses of samples. A minimum reflection loss of − 22.3 dB (> 99.9% absorption) was optimized with broadband frequency ranges. The unique heterostructures of nanocomposite are responsible for the enhanced absorption and shielding performance. Graphical abstract

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隐身用掺杂聚苯胺-环氧纳米复合材料的热吸收和微波吸收性能

聚合物纳米复合材料的热性能可以通过热重分析(TGA)和差热分析(DSC)技术来检测，而介电性能可以通过模拟散射(S11、S12、S21和S22)参数来检测。采用化学氧化聚合技术合成了聚苯胺纳米粉体。利用XRD、TEM和FESEM等技术对合成粉体的晶粒大小和形貌进行了表征。此外，通过湿混合和压缩成型技术，在聚苯胺/环氧复合材料中合成了不同体积百分比(54.0%，57.5,60.1和61.7 vol%)的聚合物纳米复合材料。因此，使用矢量网络分析仪及其软件模块测量了介质和吸收特性。利用计算得到的复介电常数数据对不同厚度样品的吸光度进行了评价。在宽带频率范围内，最小反射损耗为- 22.3 dB(> 99.9%的吸收)。纳米复合材料独特的异质结构是增强吸收和屏蔽性能的主要原因。图形抽象

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来源期刊

International Journal of Materials Research 工程技术-冶金工程

CiteScore

1.30

自引率

12.50%

发文量

119

审稿时长

6.4 months

期刊介绍： The International Journal of Materials Research (IJMR) publishes original high quality experimental and theoretical papers and reviews on basic and applied research in the field of materials science and engineering, with focus on synthesis, processing, constitution, and properties of all classes of materials. Particular emphasis is placed on microstructural design, phase relations, computational thermodynamics, and kinetics at the nano to macro scale. Contributions may also focus on progress in advanced characterization techniques. All articles are subject to thorough, independent peer review.