Enhanced electromagnetic wave absorption performance of hematite@carbon nanotubes/polyacrylamide hydrogel composites with good flexibility and biocompatibility

IF 23.2 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Advanced Composites and Hybrid Materials Pub Date : 2023-09-25 DOI:10.1007/s42114-023-00749-7

Yunchen Long, Zheng Zhang, Kai Sun, Chong Wang, Ni Zeng, Boxiang Gao, Xinxue Tang, Xiaosi Qi, Runhua Fan

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引用次数: 1

Abstract

To expand the application field of electromagnetic wave functional materials based on light, thin, and cost-effective, the integration of the structure and function of electromagnetic wave materials is the key research goal. In this work, hematite(Fe₂O₃)@carbon nanotubes (CNTs)/polyacrylamide hydrogel composites with good flexibility and biocompatibility were prepared, and the hydrogel composite exhibited excellent electromagnetic wave (EMW) absorption performance, even with a low load ratio of Fe₂O₃@CNTs (2,4,6 wt.%) achieved—the minimum reflection loss (RL_min) value of 2 wt.% Fe₂O₃@CNTs/polyacrylamide (PAM) is − 60.96 dB at 15.87 GHz with a matching thickness is 1.63 mm and a wide effective absorption bandwidth (EAB) of about 3.4 GHz. Furthermore, the RL_min values of 4 wt.% Fe₂O₃@CNTs/PAM reach − 55.65 dB at 14.15 GHz. In addition, when the thickness of the hydrogel composite is between 1.56 and 1.64 mm, almost all electromagnetic waves can be absorbed in the Ku band frequency. Therefore, the impedance matching of the hydrogel composite was optimized, and EMW absorption performance was improved by introducing Fe₂O₃@CNTs. This work provides a strategy for designing a structure–function integrated EMW absorber and a convenient method for preparing flexible and biocompatible EMW hydrogels, which will be conducive to the wider application of EMW functional materials in daily life.

Graphical Abstract

Excellent absorption performance is achieved at a low load ratio of Fe₂O₃@CNTs (2 wt.%), successfully designing hydrogel absorbers with good flexibility and biocompatibility

Abstract Image

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hematite@carbon纳米管/聚丙烯酰胺水凝胶复合材料的电磁波吸收性能增强，具有良好的柔韧性和生物相容性

为了拓展基于轻、薄、低成本的电磁波功能材料的应用领域，电磁波材料的结构和功能的集成是关键的研究目标。在本工作中，制备了具有良好柔韧性和生物相容性的赤铁矿（Fe2O3）@碳纳米管（CNTs）/聚丙烯酰胺水凝胶复合材料，该水凝胶复合材料表现出优异的电磁波（EMW）吸收性能，即使在低负载比下Fe2O3@CNTs实现了（2,4,6 wt.%）——2 wt.%的最小反射损耗（RLmin）值Fe2O3@CNTs/聚丙烯酰胺（PAM） − 匹配厚度为1.63mm，宽有效吸收带宽（EAB）约为3.4GHz。此外，RLmin值为4wt.%Fe2O3@CNTs/PAM范围 − 在14.15GHz时为55.65dB。此外，当水凝胶复合材料的厚度在1.56和1.64mm之间时，几乎所有的电磁波都可以在Ku波段频率下被吸收。因此，优化了水凝胶复合材料的阻抗匹配，并通过引入Fe2O3@CNTs.这项工作为设计结构-功能集成的EMW吸收体提供了一种策略，并为制备柔性和生物相容性的EMW水凝胶提供了一个方便的方法，这将有助于EMW功能材料在日常生活中的更广泛应用。图形摘要在Fe2O3@CNTs（2wt.%），成功设计出具有良好柔韧性和生物相容性的水凝胶吸收剂

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来源期刊

Advanced Composites and Hybrid Materials Multiple-

CiteScore

26.00

自引率

21.40%

发文量

185

期刊介绍： Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.