碳纳米管/酞菁铜纳米复合材料的制备及结构性能表征

Preparation and characterization of carbon nanotube / copper phthalocyanine composite

用微波辐照法合成了羧基酞菁铜,与羟基化碳纳米管进行溶液混合,并利用TEM、XRD、FTIR等研究了碳纳米管/酞菁铜复合材料的形态结构,同时测试了不同频率下复合材料的导电性和介电性能,并对复合材料在有机溶剂中的分散性进行了观察。结果表明,在碳纳米管表面上成功包覆了一层羧基酞菁铜,复合材料表面仍保留有大量的羧基活性基团,复合材料呈现出半导体性质,导电率随频率没有明显的变化,复合材料的介电常数随频率减小而增加,在10 Hz时复合材料的介电常数高达816,包覆有酞菁铜的碳纳米管在有机溶剂中的分散性也得到极大的提高,这为原位聚合法或溶液聚合法制备高介电聚合物基复合材料提供了可行性。

The carboxyl phthalocyanine copper was synthesized by microwave irradiation and mixed with the hydroxyl carbon nanotube in the solution to obtain carbon nanotube/phthalocyanine copper composite （CNT/CuPc）. The morphology and chemical structure of the CNT/CuPc were characterized by TEM, XRD and FTIR. The conductivity and dielectric properties of CNT/CuPc at different frequency was meas- ured and the dispersion ability of the composite was also observed. It indicated that the carbon nanotube was wrapped by a thin layer of CuPc successfully and there were many carboxyl groups on the composite. The composite was semi-conductive material and its electrical resistivity changed little with the frequency. The dielectric constant of the composite increased with the decrease of frequency and it was up to 816 at 10 Hz. The CNT/CuPc could also be dispersed in the solution more stable than the CNT. Such composite could be used as filler to prepare polymer matrix composites by in-situ polymerization or solution method.