Mechanically Reinforced Rigid Polyimide Foam via Chemically Grafting Isocyanate Acid for Ultrabroad Band Microwave Absorption

材料科学 聚酰亚胺 复合材料 抗压强度 异氰酸酯 多孔性 吸水率 微波食品加热 碳纳米管 吸收(声学) 聚氨酯 图层(电子) 量子力学 物理
作者
Nan Li,Jun-Feng Shi,Kangkang Zou,Yueyi Wang,Ding‐Xiang Yan
出处
期刊:ACS Applied Materials & Interfaces [American Chemical Society]
卷期号:15 (21): 25990-25999 被引量:15
标识
DOI:10.1021/acsami.3c03550
摘要

Polyimide (PI) foam with excellent microwave absorption (MA) performance and desirable compressive strength is highly critical and in demand in the structural MA components. Although the satisfactory MA performance of the present PI-based MA foams has been achieved by employing diverse methods, the relatively low compressive strength (∼KPa) restricted them from use as structural MA foams in practical application. Herein, isocyanate acid was introduced to the backbone of PI resin, which not only increased the PI backbone polarity and strength as rigid chain segment, but also served as a self-foaming component. The porous structure of PI foams was readily regulated by adjusting the water and carbon nanotube (CNT) filler contents of precursor dispersion. As a result of the improved polarity of the PI backbone resulted from the isocyanate group and high dielectric loss of CNT, the high compressive strength of 7.04 MPa and impressive MA property of the resultant PI foam with a low CNT loading ratio of 1.5 wt % were achieved, which were much higher than those reported previously. Especially, the effective absorption bandwidth (EAB) (RL < -10 dB) was up to 10.7 GHz (at the thickness of 3 mm), covering the C, X, and Ku bands simultaneously. Meanwhile, the EAB of the as-prepared PI foam retained 9.3 and 9.7 GHz even after being subjected to liquid nitrogen (-196 °C) and high temperature (300 °C) treatments due to the desirable stability of PI. In addition, the excellent thermal insulation resulted from the pores structure and low filler content was achieved, where the top surface only presented 60 °C after placing on 300 °C platform for 30 min. The high compressive strength, impressive MA property, and thermal insulation endowed the resultant CNT/PI foam with great potential application as structural MA foam in a harsh service environment.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
蔚欢发布了新的文献求助10
刚刚
2秒前
Akim应助罗拉采纳,获得10
3秒前
丘比特应助Heartlark采纳,获得10
3秒前
3秒前
延文星完成签到,获得积分20
5秒前
6秒前
xyj6486发布了新的文献求助10
6秒前
8秒前
8秒前
8秒前
bkagyin应助shao采纳,获得10
8秒前
糟糕的日记本完成签到,获得积分10
8秒前
蔚欢完成签到,获得积分10
9秒前
mx发布了新的文献求助10
11秒前
一川烟叶完成签到,获得积分10
11秒前
12秒前
时尚俊驰发布了新的文献求助10
13秒前
13秒前
整齐小松鼠应助mini采纳,获得10
15秒前
恋雅颖月应助liii采纳,获得10
17秒前
罗拉发布了新的文献求助10
19秒前
persist完成签到,获得积分10
20秒前
讨厌科研发布了新的文献求助10
20秒前
沉默曼文发布了新的文献求助40
21秒前
研友_VZG7GZ应助如梦如幻91采纳,获得10
21秒前
22秒前
充电宝应助mx采纳,获得10
23秒前
隐形曼青应助时尚俊驰采纳,获得10
24秒前
25秒前
量子星尘发布了新的文献求助10
25秒前
科研通AI5应助文献采纳,获得30
28秒前
cyan关注了科研通微信公众号
28秒前
29秒前
Qi发布了新的文献求助10
29秒前
领导范儿应助张钦奎采纳,获得10
30秒前
shao完成签到,获得积分10
30秒前
Heartlark发布了新的文献求助10
31秒前
淡然的千雁完成签到,获得积分10
33秒前
ren发布了新的文献求助10
34秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989378
求助须知:如何正确求助?哪些是违规求助? 3531442
关于积分的说明 11254002
捐赠科研通 3270126
什么是DOI,文献DOI怎么找? 1804887
邀请新用户注册赠送积分活动 882087
科研通“疑难数据库(出版商)”最低求助积分说明 809173