Preparation of carbon nanotubes/polyimide foam and its microwave absorption properties

被引：0
|
作者：
Wang Y. [1 ]
Yan D. [1 ]
Li Z. [2 ]
机构：
[1] School of Aeronautics and Astronautics, Sichuan University, Chengdu
[2] College of Polymer Science and Engineering, Sichuan University, Chengdu
来源：
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2022年 / 43卷 / 07期
基金：
中国国家自然科学基金;
关键词：
carbon nanotube; foam; microwave absorption performance; polyimide; stealth technology;
D O I：
10.7527/S1000-6893.2021.25531
中图分类号：
学科分类号：
摘要：
Lightweight and heat resistant foam with broadband Microwave Absorption(MA) has attracted great attention in the field of aerospace stealth technology, and the development of MA foam based on space-durable polyimide(PI) is very promising. Herein, a Carbon Nanotube(CNT)/PI foam is developed by freezing and drying water-soluble polyamic acid and CNT dispersion with the aid of polyvinyl pyrrolidone. The resulted CNT/PI foam exhibits impressive MA performance, with the minimum reflection loss reaching - 44.7 dB and effective absorption bandwidth reaching 7.4 GHz. It was found that the band of RL≤J - 5 dB can cover X and Ku bands simultaneously, which demonstrates that the foam manufactured can meet the requirements of actual application. © 2022 AAAS Press of Chinese Society of Aeronautics and Astronautics. All rights reserved.
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