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通过加热碳纳米管和强酸的混合物,使碳纳米管的憎水表面发生氧化。加热含经处理的碳纳米管的悬浮液,使之脱水,得到自组装的碳纳米管圆片,该圆片可直接分散。扫描电镜图显示该圆片由局部规则排列的碳纳米管构成;红外光谱和光电子谱分析表明在化学处理过程中,碳纳米管的表面产生了含氧官能团;虽然拉曼谱测出处理过程增加了缺陷,但是X射线衍射结果表明碳纳米管类似石墨的层状结构得到保留;同时研究了经处理的碳纳米管的热稳定性。这种自组装且可分散的碳纳米管圆片为研究碳纳米管结构材料和碳纳米管复合材料提供了有效途径。
By heating the mixture of carbon nanotubes and strong acids, the hydrophobic surface of the carbon nanotubes is oxidized. The suspension containing treated carbon nanotubes is heated and dewatered to give a self-assembled carbon nanotube wafer that can be directly dispersed. Scanning electron micrographs showed that the disk consisted of partially regularly arranged carbon nanotubes. Infrared spectroscopy and photoelectron spectroscopy analysis showed that oxygen-containing functional groups were formed on the surface of the carbon nanotubes during the chemical treatment. Although Raman spectroscopy showed an increase in the treatment process However, the X-ray diffraction results showed that the layered structure of carbon nanotubes similar to graphite was preserved. The thermal stability of the treated carbon nanotubes was also studied. This self-assembled and dispersible carbon nanotube disk provides an effective way to study carbon nanotube structure materials and carbon nanotube composites.