Properties of Co0.5Ni0.5Fe2O4/carbon nanotubes/polyimide nanocomposites for microwave absorption |
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| Authors: | Lei Zhang Chunsheng Shi Kyong Yop Rhee Naiqin Zhao |
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| Affiliation: | 1. School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;2. Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300072, China;3. Department of Mechanical Engineering, College of Engineering, Kyung Hee University, 446-701 Yongin, Republic of Korea;1. College of Materials Science and Engineering, Xi’an Polytechnic University, Xi’an, 710048, China;2. Ministry of Education Key Laboratory of Applied Physics and Chemistry in Space, College of Science, Northwestern Polytechnical University, Xi’an, 710072, China;1. Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, Jiangsu province, 215123, China;2. Ningbo Key Lab of Polymer Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang province, 315201, China;3. University of Chinese Academy of Sciences, Beijing, 100049, China;1. College of Physics, Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang City 550025, People’s Republic of China;2. Key Laboratory of Electronic Composites of Guizhou Province, Guizhou University, Guiyang City 550025, People’s Republic of China;3. National Laboratory of Solid State Microstructures and Jiangsu Provincial Laboratory for NanoTechnology, Nanjing University, Nanjing 210093, People’s Republic of China;4. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, People’s Republic of China;1. School of Science & Beijing Key Laboratory of Environmentally Harmful Chemicals Assessment, Beijing University of Chemical Technology, Beijing 100029, China;2. 501 Department, Xi''an Research Institute of High-Tech, Xi''an, 710025, China;3. School of Mechanical and Materials Engineering, North China University of Technology, Beijing 100144, China;4. School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China;1. Qinghai Provincial Key Laboratory of New Light Alloys, Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming, Qinghai University, Xining 810016, PR China;2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, PR China;1. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China;2. School of Aeronautics and Astronautics, Sichuan University, Chengdu, 610065, China;3. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China |
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| Abstract: | 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 PI. 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. |
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