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首页> 外文期刊>Journal of nanoscience and nanotechnology >Investigation of Surfactant Type, Dosage and Ultrasonication Temperature Control on Dispersity of Metal-Coated Multi-Walled Carbon Nanotubes
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Investigation of Surfactant Type, Dosage and Ultrasonication Temperature Control on Dispersity of Metal-Coated Multi-Walled Carbon Nanotubes

机译：表面活性剂类型，剂量和超声温度控制对金属包覆多壁碳纳米管分散性影响的研究

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摘要

We studied the dispersity of multi-walled carbon nanotubes (MWNTs) combined with different metallic particles (Ni and Fe). An ultrasonic-assisted water-bath dispersion process was used to disperse the metal-coated MWNTs in different solutions and the dispersity was measured using an ultraviolet-visible spectrophotometer. The dispersity and morphology of the MWNTs were characterized using field-emission scanning electron microscopy (FE-SEM) together with digital image processing technology. Effects of dispersant type (sodium dodecyl benzene sulfonate (SDBS), oleic acid, and polymer (TNEDIS)) and surfactant dosage on the dispersity of the metal-coated MWNTs were investigated under controlled and uncontrolled temperatures and results were compared with those from the untreated MWNTs. The results showed that the negative effects of temperature on the ultrasonic dispersion process could be eliminated through a temperature-controlled system. Moreover, the TNEDIS, SDBS, and oleic acid were arranged in the descending order of the dispersion effect degree. The untreated MWNTs, Ni-coated MWNTs, and Fe-coated MWNTs were arranged in the descending degree of dispersity order. Since the metal coating makes the MWNTs harder and more fragile, the metal-coated MWNTs are more likely to fracture during the ultrasonic dispersion process.
机译：我们研究了与不同金属颗粒（镍和铁）结合的多壁碳纳米管（MWNTs）的分散性。使用超声辅助水浴分散工艺将金属包覆的MWNTs分散在不同的溶液中，并使用紫外可见分光光度计测量分散度。利用场发射扫描电子显微镜（FE-SEM）结合数字图像处理技术对MWNT的分散性和形态进行了表征。研究了分散剂类型（十二烷基苯磺酸钠（SDBS），油酸和聚合物（TNEDIS））和表面活性剂用量对金属涂层的MWNTs在受控和不受控温度下分散性的影响，并将结果与​​未处理的结果进行了比较MWNT。结果表明，可以通过温度控制系统消除温度对超声分散过程的负面影响。此外，将TNEDIS，SDBS和油酸以分散效果程度的降序排列。未处理的MWNT，Ni被覆的MWNT和Fe被覆的MWNT以分散度的降序排列。由于金属涂层使MWNT变得更硬且更易碎，因此金属涂层的MWNT在超声分散过程中更容易破裂。

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