| 不同结构碳纳米管的电磁波吸收性能研究 |
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| 引用本文： | 张增富,罗国华,范壮军,项荣,周丽,魏飞.不同结构碳纳米管的电磁波吸收性能研究[J].物理化学学报,2006,22(3):296-300. |
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| 作者姓名： | 张增富 罗国华 范壮军 项荣 周丽 魏飞 |
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| 作者单位： | Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China |
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| 基金项目： | 国家自然科学重点基金(20236020)资助项目 |
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| 摘 要： | 研究了单壁、多壁碳纳米管(聚团状、阵列状)以及未纯化与纯化后碳纳米管在2～18 GHz范围内的电磁波吸收性能. 通过测定不同结构碳纳米管粉体的介电常数以及磁导率, 得到损耗因子及衰减常数大小顺序为: 阵列状多壁碳纳米管>原生聚团状多壁碳纳米管>纯化聚团状多壁碳纳米管>原生单壁碳纳米管>纯化后单壁碳纳米管. 相比多壁碳纳米管, 单壁碳纳米管衰减常数随频率变化较小, 且具有较宽的吸收峰. 模拟计算和实验测试结果都表明, 碳纳米管/聚合物复合材料具有优良的电磁吸波性能.
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| 关 键 词： | 单壁碳纳米管 多壁碳纳米管 电磁波吸收 |
| 收稿时间： | 2005-09-01 |
| 修稿时间： | 2005-10-17 |
Complex Permittivity and Permeability Spectra of Different Kinds of Carbon Nanotubes |
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| ZHANG,Zeng-Fu,LUO,Guo-Hua,FAN,Zhuang-Jun,XIANG,Rong,Li,ZHOU,WEI,Fei.Complex Permittivity and Permeability Spectra of Different Kinds of Carbon Nanotubes[J].Acta Physico-Chimica Sinica,2006,22(3):296-300. |
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| Authors: | ZHANG Zeng-Fu LUO Guo-Hua FAN Zhuang-Jun XIANG Rong Li ZHOU WEI Fei |
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| Institution: | Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China |
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| Abstract: | Carbon nanotubes (CNTs), with well defined one-dimension nanoscale tubular structure, have potential applications for electromagnetic wave absorption. The complex permittivity and permeability spectra of different kinds of CNTs were measured in the range from 2 GHz to 18 GHz. The coefficient of attenuation, impedance and loss tangents of different kinds of carbon nanotube composites were compared. The order of loss tangents is as follows: aligned multi-walled CNTs > raw tangled multi-walled CNTs > purified tangled multi-walled CNTs > raw tangled single-walled CNTs > purified tangled single-walled CNTs. The reflectivities of different kinds of carbon nanotube composites were calculated. Compared with multi-walled CNTs, single-walled CNTs have wider absorption capability. Both experimental and calculated results indicated that CNTs as filler in nano-composite materials have excellent elctromagenetic wave absorption properties. |
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| Keywords: | Single-walled carbon nanotubes Multi-walled carbon nanotubes Electromagnetic wave absorption |
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