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采用化学气相沉积法制备了高纯度的叠杯状碳纳米管薄膜。生长15 min后,薄膜厚度可达～300μm。热重分析表明薄膜的纯度高达99.9%。透射电镜表征表明碳纳米管中石墨烯片层与轴向存在一定偏角呈叠杯状排列,其直径为80 nm～230 nm。通过对催化剂与叠杯状碳纳米管的结构分析,提出其根部生长机制。该叠杯状碳纳米管薄膜易于转移且具有良好的柔性。疏水性测试表明其具有超疏水表面,接触角约为155°,因而有望作为防水和自清洁保护层。
High-purity stacked-cupped carbon nanotube films were prepared by chemical vapor deposition. After 15 min of growth, the film thickness can reach ~ 300 μm. Thermogravimetric analysis showed the purity of the film was as high as 99.9%. Transmission electron microscopy showed that the graphene sheets in carbon nanotubes were arranged in a cup-like arrangement with axial decay angle of 80 nm ~ 230 nm. Based on the structural analysis of the catalyst and stacked cupped carbon nanotubes, the root growth mechanism was proposed. The stacked cupped carbon nanotube film is easy to transfer and has good flexibility. Hydrophobicity tests show that it has a superhydrophobic surface with a contact angle of about 155 ° and is therefore expected to serve as a waterproof and self-cleaning protective layer.