科研之友
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摘要
Dispersions of multi-walled carbon nanotubes (MW-CNTs) and carbon nanoflakes (CNFs) were prepared using different oxygen plasma treatment parameters. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to investigate the dispersion states and effects of MWNTs and CNFs. FTIR results demonstrate that oxygen plasma has great effect on the surface modification of multi-walled carbon nanotubes while the oxygen plasma treatment does not have significant effect on modification of CNFs. The plasma treatment time has greater effect on the modification result and the optimal modification plan for treating CNFs with oxygen plasma can be explored by increasing the gradient of oxygen plasma treatment provided that oxygen plasma treatment power is moderate. SEM and TEM results also show that oxygen plasma not only can ensure the integrity of the MW-CNTs, but also can purify it. These results confirmed achievement of a good dispersion state and effect of MW-CNTs with oxygen plasma. Under the conditions of this experiment, oxygen plasma is not ideal for surface modification for CNFs. The dispersion mechanism of CNTs' and CNF's surface modification was analyzed.
