Detonation Modification of Multi-Walled Carbon Nanotubes
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摘要: 为研究爆轰反应对多壁碳纳米管(MWCNTs)形貌与物相的影响，将按一定质量配比制备的MWCNTs混合炸药在密闭的反应釜内引爆，并利用透射电镜和X射线衍射仪对爆轰前、后MWCNTs的形貌与物相分别进行了表征。结果发现：MWCNTs的质量分数在30%~40%时，混合炸药能够顺利起爆，并可收集到大量的样品；爆轰反应后，MWCNTs的形貌与物相发生了巨大变化，由管状结构变成以碳片、碳棒、碳球为主的结构，并有明显的团聚现象；有少量MWCNTs依附于碳片等结构边缘；样品以不定型碳为主，其石墨化程度远低于初始MWCNTs，并随着MWCNTs质量比的增大，样品的石墨化程度增大。Abstract: In order to study the influence of detonation reaction on the morphology and phase of multi-walled carbon nanotubes (MWCNTs), the mixed explosives, made from MWCNTs and RDX with a given mass ratio, were detonated in the reaction kettle.The samples before and after detonation were characterized using transmission electron microscopy and X-ray diffractometer.The results show that the mixed explosives can be detonated successfully when the mass ratio of MWCNTs ranged in 30%-40%, and a large number of samples can be collected.Moreover, the morphology and phase of MWCNTs show great changes after detonation.The morphologies are transformed into sheet, rod and ball from tubular structure, accompanied with an obvious agglomerate phenomenon, and a small quantity of MWCNTs are located at the edge of the carbon sheet.The samples are mainly amorphous carbon.The degree of graphitization is much less than that of the original MWCNTs, and it increases as the mass ratio of MWCNTs increases in the mixed explosive.
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图 4 样品的XRD图谱((a)初始样品；(b)酸处理后的样品；(c)初始样品与MWCNTs；(d)酸处理后的样品与MWCNTs)
Figure 4. XRD patterns of the samples((a) Initial samples; (b) Samples after acid treatment; (c) Initial samples compared with MWCNTs; (d) Acid treated samples compared with MWCNTs)
表 1 混合炸药配比及实验现象
Table 1. Prescription of mixed explosive and experimental phenomena
No. w1/(%) w2/(%) Phenomena T1 60 40 Exploded, with a large amount of cannon fodder T2 70 30 Exploded, with a small amount of cannon fodder T3 90 10 Exploded, with hardly any cannon fodder T4 50 50 Unexploded 
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