Multifunctional MXene/C Aerogels for Enhanced Microwave Absorption and Thermal Insulation

IF 31.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Nano-Micro Letters Pub Date : 2023-08-09 DOI:10.1007/s40820-023-01158-7

Fushuo Wu, Peiying Hu, Feiyue Hu, Zhihua Tian, Jingwen Tang, Peigen Zhang, Long Pan, Michel W. Barsoum, Longzhu Cai, ZhengMing Sun

引用次数: 0

Abstract

Highlights

Curving 2D MXene into 1D nanofibers can effectively stop the restacking of MXene flakes, and then the nanofibers are used to construct a lightweight and multifunctional MXene/C aerogel.
The MXene/C aerogels achieved an RL_min of − 53.02 dB and EAB of 5.3 GHz. The radar cross-sectional reduction value of MXene/C aerogels can reach 12.02 dB m².
Integrating multiple functions such as thermal insulation, sensing, and microwave absorption into one material—MXene/C aerogel.

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增强微波吸收和隔热的多功能MXene/C气凝胶。

二维过渡金属碳化物和氮化物(MXene)已成为微波吸收(MA)材料的有前途的候选者。但也存在阻抗匹配差、自堆叠倾向高、密度大等缺点。为了解决这些问题，MXene纳米片被整合到聚丙烯腈(PAN)纳米纤维中，随后通过PAN碳化组装成三维(3D)网络结构，得到MXene/C气凝胶。三维网络有效地扩展了微电流传输路径，从而增强了电磁波的导电损耗。此外，气凝胶丰富的孔隙结构显著改善了阻抗匹配，同时有效降低了mxene基吸收剂的密度。EM参数分析表明，MXene/C气凝胶的最小反射损耗(RLmin)值为- 53.02 dB (f = 4.44 GHz, t = 3.8 mm)，有效吸收带宽(EAB)为5.3 GHz (t = 2.4 mm, 7.44 ~ 12.72 GHz)。通过雷达截面(RCS)模拟对MXene/C气凝胶的雷达隐身效果进行了评估，结果表明，MXene/C气凝胶覆盖的完美电导体的最大RCS降低值达到12.02 dB m2。除了MA性能外，MXene/C气凝胶也表现出良好的保温性能，5mm厚的气凝胶在82℃下可以产生超过30℃的温度梯度。该研究为创建轻质、高效、多功能的mxene基MA材料提供了一种可行的设计方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

42.40

自引率

4.90%

发文量

715

审稿时长

13 weeks

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary and open-access journal that focus on science, experiments, engineering, technologies and applications of nano- or microscale structure and system in physics, chemistry, biology, material science, pharmacy and their expanding interfaces with at least one dimension ranging from a few sub-nanometers to a few hundreds of micrometers. Especially, emphasize the bottom-up approach in the length scale from nano to micro since the key for nanotechnology to reach industrial applications is to assemble, to modify, and to control nanostructure in micro scale. The aim is to provide a publishing platform crossing the boundaries, from nano to micro, and from science to technologies.