Multilayer integrated design for frequency-tunable silicone rubber-based electromagnetic shielding foams

IF 4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2026-03-01 Epub Date: 2025-10-15 DOI:10.1016/j.supflu.2025.106818

Zuoze Fan, Xiaohan Wang, Bo Wang, Yishen Zhao, Ruyun Xu, Guangxian Li, Xia Liao

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引用次数: 0

Abstract

The integrated preparation strategy of multi-layer foam materials is expected to meet the demand for frequency-selective electromagnetic shielding properties. In this study, a synergistic regulation strategy of magnetic field and supercritical CO₂ foaming technology was employed to achieve the parallel alternate arrangement of conductive layers and porous layers. The impact of the layered cell structure in liquid silicone rubber/ ferrosoferric oxide modified graphene/ carbon nanotube (LSR/Fe₃O₄@G/CNT) on the electromagnetic shielding performance in the X-band (8.4 GHz–12.4 GHz) was systematically investigated. The results demonstrate that the electromagnetic shielding effectiveness (SE_T) of the unfoamed material remained stable at 11.4 dB. In contrast, the layered foam material exhibited frequency-selective electromagnetic shielding characteristics and the maximum SE_T reaching 33.4 dB after foaming. By adjusting the foaming parameters, the position of the shielding peak can be effectively regulated, enabling the multi-layered silicone rubber foam to achieve high shielding efficiency within specific frequency bands.

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频率可调硅橡胶基电磁屏蔽泡沫的多层集成设计

多层泡沫材料的综合制备策略有望满足频率选择性电磁屏蔽性能的需求。本研究采用磁场协同调节策略和超临界CO2发泡技术，实现导电层和多孔层的平行交替排列。系统研究了液态硅橡胶/氧化铁改性石墨烯/碳纳米管（LSR/Fe3O4@G/CNT）层状电池结构对x波段（8.4 GHz - 12.4 GHz）电磁屏蔽性能的影响。结果表明，非发泡材料的电磁屏蔽效能（SET）稳定在11.4 dB。相反，层状泡沫材料表现出频率选择性电磁屏蔽特性，发泡后最大SET达到33.4 dB。通过调节发泡参数，可以有效调节屏蔽峰值的位置，使多层硅橡胶泡沫在特定频段内具有较高的屏蔽效率。

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.