Enhanced microwave absorbing performance of hydrogenated acrylonitrile-butadiene rubber/multi-walled carbon nanotube composites by in situ prepared rare earth acrylates

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• 作者：Yinghao Zhai ; Wenjing Wu ; Yong Zhang ; ^{yong_zhang@sjtu.edu.cn} ; Wentan Ren
• 关键词：A. Carbon nanotubes ; A. Polymer&ndash ; matrix composites (PMCs) ; B. Electrical properties ; Rare earth
• 刊名：Composites Science and Technology
• 出版年：2012
• 期刊代码：19_02663538
• 类别：ms
• 出版时间：27 March, 2012
• 卷：72
• 期：6
• 页码：696-701
• 文件大小：1132 K

摘要

Rare earth oxides (REO = Gd₂O₃, Dy₂O₃, Tm₂O₃) and acrylic acid (AA) were in situ reacted in hydrogenated acrylonitrile-butadiene rubber (HNBR) to prepare HNBR/multi-walled carbon nanotube (MWCNT)/REO/AA composites. The HNBR/MWCNT/REO/AA composites have higher permittivity and dielectric loss than HNBR/MWCNT composite, leading to significantly enhanced microwave absorbing performance of the HNBR/MWCNT/REO/AA composites. Dielectric permittivity analysis reveals that the HNBR/MWCNT/REO/AA composites have longer dielectric relaxation time and higher conductivity than the HNBR/MWCNT composite. The HNBR/MWCNT composite has the minimum reflection loss of 鈭?5.1 dB, while the HNBR/MWCNT/REO/AA composites have the minimum reflection loss of 鈭?8.8 dB. The improvement of microwave absorbing performance is attributed to the stronger interfacial polarization and higher conductivity after formation of in situ prepared rare earth acrylates.