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首页> 外文期刊>Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems >Influence of dry and wet ball milling on dispersion characteristics of the multi-walled carbon nanotubes in aqueous solution with and without surfactant
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Influence of dry and wet ball milling on dispersion characteristics of the multi-walled carbon nanotubes in aqueous solution with and without surfactant

机译：干湿球磨对多壁碳纳米管在有表面活性剂和无表面活性剂的水溶液中分散特性的影响

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摘要

The current paper presents a new approach of attaining the optimum grinding condition of a planetary ball mill and simple method for purifying multi-walled carbon nanotubes (MWCNTs) to investigate the dispersion characteristics of MWCNTs. This work was conducted under dry and wet grinding conditions at various rotation speeds (200 rpm-500 rpm), and the dispersion characteristics of MWCNTs in aqueous solutions with and without surfactant were studied. The results were examined by scanning electron microscopy (SEM), transmission electron microscopy (TEM), particle-size analysis (PSA), UV-spectrophotometry and zeta potential (ζ) measurements. The purification results show that the structures of amorphous carbon and carbon particles of MWCNTs were completely eliminated and the tips of nanotubes opened. Moreover, both dry and wet grinding caused the lengths of the MWCNTs to be shortened with increasing rotation speed. The maximum absorbance of nanofluid was revealed to be 2.485 abs at wavelength of 253 nm for the best dispersion. The best dispersion characteristics were observed for wet grinding at a rotation speed of 500 rpm assisted by the ultrasonication dispersion of CNTs in aqueous solutions with surfactant.
机译：本文提出了一种获得行星式球磨机最佳磨削条件的新方法，以及一种纯化多壁碳纳米管（MWCNT）的简单方法，以研究MWCNT的分散特性。这项工作是在干磨和湿磨条件下，以不同的转速（200 rpm-500 rpm）进行的，研究了含或不含表面活性剂的MWCNT在水溶液中的分散特性。通过扫描电子显微镜（SEM），透射电子显微镜（TEM），粒度分析（PSA），紫外分光光度法和ζ电势（ζ）测量来检查结果。纯化结果表明，MWCNTs的无定形碳和碳颗粒结构被完全消除，纳米管的尖端打开。此外，干磨和湿磨都导致MWCNT的长度随着转速的增加而缩短。为了获得最佳分散性，在253 nm波长处发现纳米流体的最大吸收率为2.485 abs。对于CNTs在具有表面活性剂的水溶液中超声分散的辅助，在500 rpm的转速下湿磨时观察到最佳的分散特性。

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