超声喷雾化学镀法制备镀Ni碳纳米管及其微波吸收性能

将碳纳米管（CNTs）经过酸化、敏化和活化处理后，采用超声喷雾化学镀的方法来制备镀Ni碳纳米管（Ni-CNTs）。采用TEM、EDS和拉曼光谱进行表征。结果表明，采用超声喷雾化学镀可实现Ni层在CNTs表面均匀连续的镀覆，并且改善了CNTs的分散性，有利于其在复合材料领域的应用。不同形貌的Ni-CNTs的吸波性能有明显差异。对于镀层相对较薄的Ni-CNTs试样，其反射损耗峰值为-17.12 dB，出现在9.36 GHz处；吸波频带宽度为5.28 GHz（R<-5 dB）和2 GHz（R<-10 dB），这样的趋势有利于制造宽频复合吸波材料。

Ultrasonic spray preparation of chemical Ni-plating carbon nanotubes and microwave absorbing properties

After acidification, sensitization and activation of multi-carbon nanotubes(CNTs), Ni-coated CNTs (Ni-CNTs)were produced by electroless plating through ultrasonic spray atomization. The obtained CNTs were characterized by TEM, EDS and Raman spectra. The results show that a continous and uniform Ni-plating layer is obtained. And the dispersion of CNTs in the product has been improved, which makes Ni-CNTs more conducive in the application area of composite materials. It is found that the different microstructure of the Ni plated absorbing properties of carbon nanotubes have obvious difference. For the Ni plated CNTs with relatively thin coatings, the maximum microwave absorbing peak of the Ni-CNTs is -17.12 dB at 9.36 GHz, the band width is 5.28 GHz (R<-5 dB) and 2 GHz (R<-10 dB), which is contributed to manufacturing broadband composite absorbing materials.