碳纳米管/聚酰亚胺泡沫的制备及其吸波性能

王跃毅; 鄢定祥; 李忠明

doi:10.7527/S1000-6893.2021.25531

航空学报 >

2022 , Vol. 43 >Issue 7: 425531 - 425531

DOI: https://doi.org/10.7527/S1000-6893.2021.25531

材料工程与机械制造

碳纳米管/聚酰亚胺泡沫的制备及其吸波性能

王跃毅 ,
鄢定祥 ,
李忠明

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1. 四川大学空天科学与工程学院, 成都 610065;
2. 四川大学高分子科学与工程学院, 成都 610065

收稿日期: 2021-03-18

修回日期: 2021-05-21

网络出版日期: 2021-05-21

基金资助

国家自然科学基金(21704070,21878194,51721091)

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

WANG Yueyi ,
YAN Dingxiang ,
LI Zhongming

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1. School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, China;
2. College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China

Received date: 2021-03-18

Revised date: 2021-05-21

Online published: 2021-05-21

Supported by

National Natural Science Foundation of China (21704070, 21878194, 51721091)

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摘要

轻质耐高温的吸波泡沫在航空航天隐身技术领域具有广泛的应用。制备具有优异吸波性能的聚酰亚胺泡沫在航空航天领域具有极大的应用潜力。通过冷冻干燥水溶性聚酰亚胺酸溶液和碳纳米管分散液,成功制备了轻质碳纳米管/聚酰亚胺泡沫。由于碳纳米管良好分散性及其特有的多孔结构,所制备泡沫表现出优异的吸波性能,其最大反射损耗达到-44.7 dB,有效吸波带宽,即反射损耗值≤-10 dB的波段达7.4 GHz,同时,RL≤-5 dB的波段可以覆盖整个X和Ku波段,表现出较好的应用潜力。

关键词： 隐身技术; 碳纳米管; 聚酰亚胺; 泡沫; 吸波性能

本文引用格式

王跃毅 , 鄢定祥 , 李忠明 . 碳纳米管/聚酰亚胺泡沫的制备及其吸波性能[J]. 航空学报, 2022 , 43(7) : 425531 -425531 . DOI: 10.7527/S1000-6893.2021.25531

Abstract

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 ≤ -5 dB can cover X and Ku bands simultaneously, which demonstrates that the foam manufactured can meet the requirements of actual application.

Key words： stealth technology; carbon nanotube; polyimide; foam; microwave absorption performancehttp

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