Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 43, Issue 12, Pages 2241-2248Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2012.08.014
Keywords
Polymer-matrix composites (PMCs); Nano-structures; Physical properties; Surface treatment
Funding
- National Basic Research Program of China [2010CB934700]
- National Research Foundation of Korea [핵06A1101] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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High-temperature microwave absorbing materials are of great interest due to their ability to withstand high temperatures. Multi-walled carbon nanotubes (MWNTs) were surface modified by Ar plasma and Co0.5Ni0.5Fe2O4 nanoparticles were doped onto the surface of the MWNTs by a chemical co-precipitation method. Co0.5Ni0.5Fe2O4/MWNTs powders were then added to polyimide to prepare nanocomposites for microwave absorption. After plasma modification, the surface of the MWNTs produced carboxyl groups, which are beneficial for interfacial bonding between the MWNTs and Pl. The glass transition temperature of the nanocomposites was 261 C and their thermostability was preserved up to 500 C. The maximum reflection loss (RL) value of nanocomposites containing 0.75 wt% modified MWNTs was -24.37 dB and the frequency range where the RL value was less than -10 dB was 5.1 GHz from 7.8 to 12.9 GHz. (c) 2012 Elsevier Ltd. All rights reserved.
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