Purifying carbon nanotube wires by vacuum annealing
Purifying carbon nanotube wires by vacuum annealing
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DOI：
10.1016/j.matpr.2018.08.157
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
R. Sundaram;Takeo Yamada;K. Hata;A. Sekiguchi
中科院分区：
文献类型：
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作者：
R. Sundaram;Takeo Yamada;K. Hata;A. Sekiguchi
我们建议真空退火纯化碳纳米管线（CNTWs）制造的表面活性剂分散体通过去除残余的含碳杂质（表面活性剂和溶剂）包括在纺丝过程中。我们通过扫描电子显微镜、拉曼光谱和热重分析法分析了退火后CNTW纯度与处理温度和时间的关系。我们的结果表明，在800 °C（≥3 h）或1000 °C（≥1 h）退火后实现最大纯化。最佳纯化的线材显示出比未处理的线材（分别为约71wt%和25）更高的CNT含量和G/D（分别为约93wt%和>30）。
We propose vacuum annealing to purify carbon nanotube wires (CNTWs) manufactured from surfactant dispersions by removing residual carbonaceous impurities (surfactant and solvent) included during wire-spinning. We analysed the CNTW purity post-annealing vs. treatment temperature and time by scanning electron microscopy, Raman spectroscopy, and thermogravimetry. Our results suggest that maximal purification is achieved after annealing at 800 °C (for ≥3 h) or at 1000 °C (for ≥1 h). The optimally purified wires show higher CNT content and G/D (∼93 wt% and >30, respectively) than the untreated wires (∼71 wt% and 25, respectively).