Toward strong X-band-electromagnetic-wave-absorbing materials: polyimide/carbon nanotube composite aerogel with radial needle-like porous structure

Due to high conductivity, lightweight, good corrosion resistance, and designable structure, polymer/carbon aerogels have attracted considerable attention and have become a candidate for a new generation of electromagnetic interference shielding materials. However, caused by the disordered honeycomb...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2022-12, Vol.1 (47), p.2514-25147
Main Authors: Liu, Shi, Xu, Qiang, Bai, Yuting, Wang, Xu, Liu, Xiangyang, Yan, Cenqi, Wang, Yinghan, Qin, Jiaqiang, Cheng, Pei
Format: Article
Language:English
Subjects:
Absorption
Aerogels
Carbon
Carbon nanotubes
Composite materials
Corrosion resistance
Effectiveness
Electromagnetic interference
Electromagnetic shielding
Freeze drying
Mechanical properties
Military aircraft
Polymers
Reconnaissance aircraft
Stealth technology
Superhigh frequencies
Thermal stability
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Summary:Due to high conductivity, lightweight, good corrosion resistance, and designable structure, polymer/carbon aerogels have attracted considerable attention and have become a candidate for a new generation of electromagnetic interference shielding materials. However, caused by the disordered honeycomb micropore, most polymer/carbon aerogels show relatively low absorption shielding effectiveness/total shielding effectiveness (SE A /SE T ) at present. This feature will restrict the application of polymer/carbon aerogels in some specific areas, such as stealth aircraft and reconnaissance planes. In this work, a regular microporous structure was designed to address the above issues through radial freeze-drying methods. The fabricated polyimide/carbon nanotube aerogels with radial needle-like porous structure show excellent thermal stability, compressive mechanical properties, and electromagnetic interference shielding performance (∼53.1 dB with a thickness of 2 mm in the axial direction). The SE A /SE T value of the polyimide/carbon nanotube aerogels is as high as 94.5%. Polyimide/carbon nanotube aerogels with radial needle-like porous structures were designed through radial freeze-drying methods, which show excellent thermal stability, mechanical properties, and electromagnetic interference shielding performance.
ISSN:2050-7488
2050-7496
DOI:10.1039/d2ta05845f