To obtained carbon nanotubes agglomerate with high density, potentially used as energy-adsorbing materials, the method of adding water in the conventional chemical vapor deposition process was proposed. The effect of water was to increase the activity of the Co-Mo-Al2O3 catalyst for decomposing ethylene and to increase the amount of carbon nanotubes drastically in short time. By this way, the density of carbon nanotubes agglomerate increased from 40-65 kg/m3 to 120~140 kg/m3. The results showed that the as-obtained carbon nanotubes agglomerates had obvious multi-scale pore size distribution and the secondary stage compression behaviors, which had advantages to become more compact structure to absorb large amounts of energy in volumetric view.%为得到更加密实的碳纳米管聚团弹性体,使之成作为一种能量吸收材料,在化学气相沉积制备碳纳米管过程中,提出通水提高Co-Mo-Al2O3催化剂裂解乙烯的活性,以便在短时间内促进碳纳米管快速生长的方法,可将碳纳米管聚团密度由40～65 kg/m3提高至120～140 kg/m3.结果表明,所得碳纳米管聚团结构具有明显的二级聚团孔结构分布特征,二级聚团压缩响应特征,并具有明显的高密度压缩体的优点,能够在较小的体积吸收更多能量.
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