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复合金属层包覆碳纳米管的制备及电磁屏蔽性能
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昆明理工大学材料科学与工程学院

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国家自然科学基金青年项目(项目号51301079);云南省科技厅重大项目(项目号KKSB201451004);云南省稀贵金属材料协同创新基金(项目号KKPT201551005)


Electromagnetic shielding performance research of composite metal plating carbon nanotubes
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School of Materials Science and Engineering, Kunming University of Science and Technology

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    摘要:

    对碳纳米管(CNTs)进行复合金属包覆,可以发挥不同组元间的复合效应,提高在高频范围的电磁屏蔽性能。本文对CNTs进行预处理后,采用超声喷雾化学镀的方法来制备镀镍碳纳米管(Ni-CNTs),在此基础上分别采用化学镀和共沉淀法制备镍银包覆碳纳米管(Ni/Ag-CNTs)和镍铜包覆碳纳米管(Ni/Cu-CNTs)。采用TEM、FESEM和XRD对镀层形态及结构进行表征,结果表明,采用超声喷雾化学镀方法,在改善CNTs分散性的前提下可实现镍层在其表面均匀连续镀覆;并结合化学镀和共沉淀法分别成功制备出Ni/Ag-CNTs和Ni/Cu-CNTs。电磁屏蔽测试表明,Ni/Ag-CNTs和Ni/Cu-CNTs的电磁屏蔽性能显著优于Ni-CNTs (55.62dB),分别达到了89.34 dB和72.21 dB。

    Abstract:

    Carbon nanotubes(CNTs) coated with metals will show further improvement of electromagnetic shielding performance,due to the composite effect of CNTs and metal coatings. In this paper, Ni-coated CNTs (Ni-CNTs)were firstly prepared with a novel electroless plating method assisted with ultrasonic spray atomization, and then silver coated Ni-CNTs(Ni/Ag-CNTs) and copper coated Ni-CNTs(Ni/Cu-CNTs) were prepared respectively by electroless plating or coprecipitation. The obtained composite powders were characterized by TEM、FESEM and XRD. The Ni-CNTs showed continuous and uniform nickel layers on highly dispersed CNTs,and both the Ni/Ag-CNTs and Ni/Cu-CNTs composite powders showed the morphology of Ni-CNTs embedded in silver or copper particles. The multi-metal coated CNTs showed significant improvement of electromagnetic shielding properties, and the shielding effectiveness of Ni/Ag-CNTs, Ni/Cu-CNTs and Ni-CNTs was 89.34 dB, 72.21 dB and 55.62 dB, respectively.

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赵琪,刘意春.复合金属层包覆碳纳米管的制备及电磁屏蔽性能[J].稀有金属材料与工程,2019,48(1):249~253.[Zhao Qi, Liu Yichun. Electromagnetic shielding performance research of composite metal plating carbon nanotubes[J]. Rare Metal Materials and Engineering,2019,48(1):249~253.]
DOI:10.12442/j. issn.1002-185X.20170361

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  • 收稿日期:2017-05-03
  • 最后修改日期:2017-08-15
  • 录用日期:2017-09-11
  • 在线发布日期: 2019-02-18
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