High temperature electromagnetic and microwave absorbing properties of polyimide/multi-walled carbon nanotubes nancomposites

被引：33

作者：

Wang, Hongyu ^{[1
]}

Zhu, Dongmei ^{[1
]}

Zhou, Wancheng ^{[1
]}

Luo, Fa ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2015年 / 633卷

基金：

中国国家自然科学基金;

关键词：

MECHANICAL-PROPERTIES; COMPOSITES; ABSORPTION; BEHAVIOR; NANOCOMPOSITES; POLYANILINE; MWCNTS; RUBBER;

D O I：

10.1016/j.cplett.2015.05.048

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Multi-walled carbon nanotubes (MWCNTs) were introduced into polyimide matrix to fabricate high temperature microwave absorbing materials. The flexural strength can reach 125 MPa with 2 wt% MWCNTs, and the flexural strength decreases with increasing the filler content due to the filler reinforcement. The complex permittivity of the nanocomposite increases with increasing the temperature owing to shorten the relaxation time and enhance the electrical conductivity at elevated temperature. When the content of absorbent is 5%, the -10 dB absorption bandwidth could reach 1.3 GHz, with the thickness of 2.1 mm, while the bandwidth below -10 dB is 2.04 GHz with the thickness of 1.7 mm at 373 K. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：223 / 228

页数：6

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