This article reports the effect of pretreatment with ultrasonic vibration before a plasma treatment onto multiwalled carbon nanotubes (MWCNTs). The pretreatment is supposed to loosen bundled CNTs, enlarging the area to expose the plasma and then increasing the functionalization ratio. Next, the authors conducted a series of experiments to confirm the effect of the pretreatment. The experiment showed that the CNTs with pretreatment have more functionalization ratio of isocyanate (NCO) groups than the CNTs without pretreatment. In the condition of the processes in this article, the ratio had doubled due to the pretreatment. The authors also confirmed the effect of the pretreatment with the wear-resistance exam of polyurethane composite films with the plasma-processed CNTs. Finally, this article concluded that the pretreatment with sonication is effective in plasma functionalization to maximize the functionalization ratio of CNTs.

中文翻译：

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超声振动对等离子体处理的多壁碳纳米管的预处理效果

本文报道了在等离子处理之前对多壁碳纳米管（MWCNT）进行超声波振动预处理的效果。预处理应该使成束的CNT松散，扩大面积以暴露等离子体，然后增加官能化率。接下来，作者进行了一系列实验以确认预处理的效果。实验表明，经过预处理的碳纳米管比未经预处理的碳纳米管具有更大的异氰酸酯（NCO）基官能团比率。在本文的工艺条件下，由于预处理，该比例增加了一倍。作者还通过用等离子体处理的CNT的聚氨酯复合膜的耐磨性检查确认了预处理的效果。最后，