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摘要: 采用化学气相沉积工艺在炭纤维表面生长了碳纳米管，并观察了它的微观形貌，且对其影响因素进行了初步研究。结果表明：纤维表面的纵向沟槽可以负载催化剂粒子，是生长碳纳米管的物理基础；催化剂的浓度太高，金属粒子容易团聚长大，所得碳纳米管的管径较大；而催化剂浓度太低，则不能在炭纤维整个表面均匀生长碳纳米管；最佳的催化剂溶液的浓度是0.05mol/L的硝酸钴。比较了铁、钴、镍三种过渡金属催化剂，从形成的碳纳米管的质量来看，钴催化剂最佳。Abstract: The growth of carbon nanotubes on the surface of carbon fibers by chemical vapor deposition was investigated and their microstructure was studied by scanning electron microscopy. Results show that grooves on the surface of carbon fibers, which can load catalysts, are locations for the growth of the nanotubes. Cobalt is the best catalyst among Fe, Co, and Ni. Carbon nanotubes are of large diameter when the catalyst concentration is high. Carbon nanotubes cannot be distributed evenly on the whole surface when the concentration of catalysts is low. The optimum catalyst concentration of cobalt nitrate is 0.05mol/L.
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Key words:
- Carbon nanotubes /
- Carbon fiber /
- Chemical vapor deposition
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