摘要
在碳纳米管表面镀覆磁性金属粒子，可获得电磁性能优异的复合材料。对碳纳米管进行预处理，再用化学镀法在其表面包覆钴金属制备碳纳米管一维复合材料。用透射电子显微镜（TEM）、能谱仪、振动样品磁强计、矢量网络分析仪分析了复合材料的形貌、成分及电磁性能，并研究了化学镀工艺对镀层沉积速率的影响。结果表明：镀覆后碳管表面包覆了一层钴，碳管的外径增加；优化的化学镀工艺中主盐与还原剂浓度比为0．38，配位剂浓度为25～30g／L，镀液pH值为8．5，镀液温度为40～80℃；在2GHz时，复合材料的复磁导率μ’和μ”分别为2．14和1．63，复介电常数ε’和ε”分别为12．00和2．04，这种电磁特性可以应用于微波吸收领域。
One-dimensional nanocomposite of carbon nanotubes was prepared by making use of electroless cobalt plating.The morphology and composition of the composite were analyzed by means of transmission electron microscopy and energy dispersive spectrometry.The electromagnetic properties of the composite were evaluated using a vibrating sample magnetometer and a vector network analyzer.The effect of electroless plating technology on the deposition rate of the coating was investigated.Results indicate that the optimized electroless plating conditions are determined as major salt concentration to reducing agent concentration ratio of 0.38,complexing agent concentration of 25~30 g/L,bath pH value of 8.5 and bath temperature of 40~80 ℃.The composite had real permeability μ′,imaginary permeability μ″,real permittivity ε′ and imaginary permittivity ε″ of 2.14,1.63,12.00 and 2.04 respectively at a frequency of 2 GHz,showing promising potential as microwave absorbing material.
出处
《材料保护》
CAS
CSCD
北大核心
2011年第3期5-7,88,共3页
Materials Protection
基金
中国博士后科学基金(20090451092)
关键词
化学镀
钴包覆层
碳纳米管
一维纳米复合材料
电磁特性
electroless plating
cobalt coating
carbon nanotubes
one-dimensional nanocomposite
electromagnetic properties
