外贴Fe3O4/CNTs杂化碳纳米纸的碳纳米管复合材料吸波性能

doi:10.15541/jim20140200

摘要/Abstract

摘要：

通过对Fe₃O₄纳米粒子接枝碳纳米管的单分散水溶液真空吸滤制备出一种新型的杂化碳纳米纸, 它与树脂浸润良好, 可以与复合材料一体成型。分别借助FE-SEM、EDS、BJH法和振动样品磁强计表征杂化碳纳米纸及其复合材料的微观形貌、元素组成、平均孔径分布和磁性能。在8.2~18 GHz频段内利用波导法测量碳纳米管共混复合材料和外贴杂化碳纳米纸/碳纳米管共混复合材料的电磁参数和吸波反射率。研究结果表明: 外贴一层杂化碳纳米纸(厚0.1 mm)后, 碳纳米管共混复合材料的磁损耗明显增加, 在8.2~18 GHz微波频段内吸波反射率基本上全部小于-10 dB(频宽大于9.7 GHz), 在15.42 GHz位置, 反射损耗峰达-43.18 dB, 远优于碳纳米管共混复合材料。

关键词: Fe3O4接枝碳纳米管, 杂化碳纳米纸, 碳纳米管复合材料, 电磁参数, 反射率

Abstract:

A naval hybrid buckypaper was fabricated by vacuum filtration method with monodispersed solution of Fe₃O₄ decorated carbon nanotubes (CNTs), which was easy to be infiltrated by resin and can be co-cured with polymer composites. The morphology, element composition, pore size distribution, and magnetic of hybrid buckypaper were characterized by field-emission scanning electron microscope (FE-SEM), energy dispersive spectrometer (EDS), Barret-Joyner-Halenda (BJH) and vibrating sample magnetometer. The electromagnetic parameters of CNTs composite and hybrid buckypaper attached CNTs composite were investigated in the frequency range of 8.2-18 GHz with wave guide method and the reflection loss can be calculated. The hybrid buckypaper with only absorbing thickness of 0.1 mm attached CNTs composite possesses much broader absorbing bandwidth and larger reflectivity than those of CNTs composite, nearly all of which reflectivity is below -10 dB in frequency range of 8.2-18 GHz and the minimum value is -43.18 dB at 15.42 GHz.

Key words: Fe3O4/decorated CNTs, hybrid buckypaper, CNTs composite, electromagnetic parameter, reflection loss

中图分类号:

TB33
V218

卢少微, 李倩, 雄需海, 马克明, 许卫凯, 贾彩霞. 外贴Fe₃O₄/CNTs杂化碳纳米纸的碳纳米管复合材料吸波性能[J]. 无机材料学报, 2015, 30(1): 23-28.

LU Shao-Wei, LI Qian, XIONG Xu-Hai, MA Ke-Ming, XU Wei-Kai, JIA Cai-Xia. Microwave Abosrbing Properties of CNTs Composites Attached with Fe₃O₄/CNTs Hybrid Buckypaper[J]. Journal of Inorganic Materials, 2015, 30(1): 23-28.

图/表 7

图 1 杂化碳纳米纸及其复合材料

Fig. 1 Hybrid BP and hybrid BP composites

表 1 杂化碳纳米纸基本参数

Table 1 Basic parameters of hybrid buckypaper

	Weight /mg	Radius /mm	Thickness /mm	Conductivity /(S?cm^-1)
Hybrid BP	549.2	50	0.1	19.76

图 2 杂化碳纳米纸SEM照片(a), 杂化碳纳米纸平均孔径分布(b), 杂化碳纳米纸复合材料断面SEM照片(c, d)

Fig. 2 SEM images of hybrid BP (a), distribution of pore size diameter for hybrid BP (b), SEM images of hybrid BP/composite (c, d)

图 3 杂化碳纳米纸的磁滞曲线

Fig. 3 Hysteresis loops of hybrid buckypaper

图 4 杂化碳纳米纸复合材料和CNTs复合材料的复介电常数和复磁导率

Fig. 4 Complex permittivity and complex permeability of hybrid BP/CNTs composite and CNTs composite

图 5 杂化碳纳米纸复合材料和CNTs复合材料的介电损耗(a)和磁损耗(b)

Fig. 5 Dielectric loss tanδε(a) and magnetic loss tanδµ (b) for hybrid BP/CNTs composite and CNTs composite

图 6 杂化碳纳米纸/CNTs复合材料和CNTs复合材料的计算吸波损耗

Fig. 6 Calculated reflection loss of hybrid BP/CNTs composite and CNTs composite

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外贴Fe₃O₄/CNTs杂化碳纳米纸的碳纳米管复合材料吸波性能

Microwave Abosrbing Properties of CNTs Composites Attached with Fe₃O₄/CNTs Hybrid Buckypaper

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