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利用催化裂解法成功地制备了铁基碳纳米管复合材料,并研究了制备温度、丙酮流速对碳纳米管生长的影响规律。试验采用场发射扫描电子显微镜对样品进行了表征与分析。研究结果表明:丙酮流速对碳纳米管的生长有重要影响,碳纳米管的质量随丙酮流速的提高均呈现出先提高后降低的规律。当制备温度为700℃,丙酮流速为2 m L/min时,制得的铁基碳纳米管复合材料碳纳米管分布均匀、与基体结合良好,此试验条件下碳纳米管的生长为顶部生长机理。但铁基碳纳米管复合材料的韧性、可塑性等性能还有待于进一步研究。
Iron-based carbon nanotube composites were successfully prepared by catalytic cracking method. The effects of preparation temperature and flow rate of acetone on the growth of carbon nanotubes were studied. The field emission scanning electron microscopy was used to characterize and analyze the samples. The results show that the flow rate of acetone has an important influence on the growth of carbon nanotubes. The mass of carbon nanotubes increases with the increase of acetone flow and then increases first and then decreases. When the preparation temperature is 700 ℃ and the flow rate of acetone is 2 m L / min, the prepared Fe-based CNTs have the uniform distribution and the good combination with the substrate. The growth of the CNTs under this test condition is the top growth mechanism. However, the toughness, plasticity and other properties of iron-based carbon nanotube composites have yet to be further studied.