Microwave Absorption of Single-Walled Carbon Nanotubes/Soluble Cross-Linked Polyurethane Composites

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• 作者：Zunfeng Liu ; Gang Bai ; Yi Huang ; Feifei Li ; Yanfeng Ma ; Tianying Guo ; Xiaobo He ; Xiao Lin ; Hongjun Gao ; Yongsheng Chen
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：September 20, 2007
• 年：2007
• 卷：111
• 期：37
• 页码：13696 - 13700
• 全文大小：203K
• 年卷期：v.111,no.37(September 20, 2007)
• ISSN：1932-7455

文摘

Processable composites of single-walled carbon nanotubes (SWNTs) with soluble cross-linked polyurethane(SCPU) were prepared at various loadings of SWNTs (0-25 wt %), and they exhibited strong microwaveabsorption in the microwave range of 2-18 GHz. For example, 5 wt % loading SWNTs/SCPU compositehas a strong absorbing peak at 8.8 GHz and achieves a maximum absorbing value of 22 dB. The absorbingpeak position moves to lower frequencies with increasing SWNT loading. Theoretical simulation for themicrowave absorption using the transmission line theory agrees well with the experimental results.The microwave absorption of these composites can be mainly attributed to the dielectric loss rather thanmagnetic loss.