具有优异电磁微波吸收性能的还原氧化石墨烯气凝胶微球的制备

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon Pub Date : 2025-05-28 DOI:10.1016/j.carbon.2025.120466

Nian Luo, Yusong Ma, Zhaoyang Ni, Feng Chen, Qiang Fu

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引用次数: 0

摘要

采用油包水乳液法制备了还原氧化石墨烯气凝胶微球（RGOAMs），经冷冻干燥和炭化处理，并对其微波吸收性能进行了评价。由于RGOAMs的多孔结构和高比表面积（288.8 m2/g），不仅具有优异的阻抗匹配性能，而且具有高的传导损耗和多重散射损耗，使得RGOAMs/PDMS复合材料在超低含量下具有优异的微波吸收性能。RGOAMs-4在匹配厚度为4 mm时的最小反射损耗（RLmin）为- 66.72 dB，有效吸收带宽（EAB）可达7.7 GHz。因此，制备的RGOAMs为实现超低填料含量的高性能电磁微波吸收（EMA）提供了新的途径。

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Preparation of reduced graphene oxide aerogel microspheres with excellent electromagnetic microwave absorption performance

Reduced graphene oxide aerogel microspheres (RGOAMs) were prepared via a water-in-oil emulsion method, followed by freeze-drying and carbonization, and the microwave absorption performance was evaluated. Due to the porous structure and high specific surface area (288.8 m²/g), RGOAMs not only exhibit excellent impedance matching performance, but also show high conduction loss and multiple scattering loss, enabling the RGOAMs/PDMS composites to achieve outstanding microwave absorption properties at ultralow content. The RGOAMs-4 with merely 0.4 wt% loading achieves a minimum reflection loss (RL_min) of −66.72 dB at a matched thickness of 4 mm, and the effective absorption bandwidth (EAB) can reach up to 7.7 GHz. Therefore, the prepared RGOAMs provide a new approach for realizing high-performance electromagnetic microwave absorption (EMA) with an ultralow content of filler.

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来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.