聚氨酯-碳纳米管复合泡沫的亚太赫兹吸收屏蔽性能

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-09-18 DOI:10.1016/j.materresbull.2025.113793

Ahmad Mamoun Khamis , Laetitia Urbanczyk , Christophe Detrembleur , Isabelle Huynen

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引用次数: 0

摘要

本研究对多壁碳纳米管（CNT）在5.85 GHz至330 GHz的超宽带频率范围内对聚氨酯（PU）泡沫的微观结构和电磁屏蔽性能的影响进行了新的研究。微观结构结果表明，碳纳米管在PU表面形成了一个相互连接且分布均匀的网络。此外，将碳纳米管含量从1wt .%增加到11.2 wt.%，在整个频率范围内显着提高了总屏蔽效率（SET）约四倍。我们的2.4 mm厚泡沫复合材料样品的SET性能的主要机制是吸收，在40 GHz以上和330 GHz以下的SET中占98%。因此，在此范围内达到的相应吸收水平为13 - 45 dB。我们的样品在电磁干扰屏蔽应用中表现出巨大的潜力，因为它们符合标准的商业要求。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Sub-terahertz absorption shielding performances of polyurethane - Carbon nanotubes composite foams

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Sub-terahertz absorption shielding performances of polyurethane - Carbon nanotubes composite foams

This study presents a novel investigation of the impact of multiwalled carbon nanotube (CNT) on the microstructure and electromagnetic shielding properties of polyurethane (PU) foams across an exceptional ultra-wideband frequency range, from 5.85 GHz to 330 GHz. The microstructure results show that the CNT formed an interconnected and well-distributed network on the PU surface. In addition, increasing CNT content from 1 wt.% to 11.2 wt.% significantly enhanced the total shielding effectiveness (SE_T) by approximately four times over the whole frequency range. The absorption is identified as the main mechanism contributing to the SE_T performance of our 2.4 mm-thick foamed composite samples, representing >98 % of the SE_T above 40 GHz and up to 330 GHz. Hence, the corresponding absorption level achieved in this range is 13 – 45 dB. Our samples exhibit significant potential for electromagnetic interference shielding applications since they meet the standard commercial requirements.

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.