Glory J, Mierczynska A, Pinault M, Mayne-L'Hermite M, Reynaud C
Laboratoire Francis Perrin (CEA-CNRS URA 2453), DSM/DRECAM/SPAM CEA-Saclay bât. 522, 91191 Gif sur Yvette Cedex, France.
J Nanosci Nanotechnol. 2007 Oct;7(10):3458-62. doi: 10.1166/jnn.2007.834.
Dispersion of nanotubes is a crucial step for many applications. The properties of the final nanotube-based material are strongly dependent on the quality of nanotube suspensions. In this study, long and aligned multi-walled carbon nanotubes obtained by catalytic chemical vapour deposition were dispersed in water with different dispersing agents using high intensity ultrasounds. Among different additives, we selected sodium dodecyl sulfate (SDS) as dispersing agent to prepare suspensions of nanotubes. UV-Visible spectrometry method was used to measure the influence of dispersion parameters (power and duration of sonication) on dispersion state and suspension stability. Therefore, we demonstrated that, even if high intensity ultra-sounds are breaking nanotubes, it is possible to obtain stable water-based suspensions containing MWNTs which exhibit length up to 20 microm.
对于许多应用而言，纳米管的分散是关键步骤。最终基于纳米管的材料的性能在很大程度上取决于纳米管悬浮液的质量。在本研究中，通过催化化学气相沉积获得的长且排列整齐的多壁碳纳米管，使用高强度超声在水中与不同的分散剂进行分散。在不同添加剂中，我们选择十二烷基硫酸钠（SDS）作为分散剂来制备纳米管悬浮液。采用紫外可见光谱法测量分散参数（超声功率和持续时间）对分散状态和悬浮液稳定性的影响。因此，我们证明，即使高强度超声会使纳米管断裂，但仍有可能获得含有长度达20微米的多壁碳纳米管的稳定水基悬浮液。
