Relation of the number of cross-links and mechanical properties of multi-walled carbon nanotube films formed by a dehydration condensation reaction.
Relation of the number of cross-links and mechanical properties of multi-walled carbon nanotube films formed by a dehydration condensation reaction.
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DOI：
10.1021/jp0642387
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发表时间：
2006-10
期刊：
影响因子：
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通讯作者：
Shin-ichi Ogino;Y. Sato;G. Yamamoto;K. Sasamori;H. Kimura;T. Hashida;K. Motomiya;B. Jeyadevan
中科院分区：
文献类型：
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作者：
Shin-ichi Ogino;Y. Sato;G. Yamamoto;K. Sasamori;H. Kimura;T. Hashida;K. Motomiya;B. Jeyadevan
采用1，3-二环己基碳二亚胺（DCC）与多壁碳纳米管（MWCNT）的羧基和羟基进行缩合反应，制备了MWCNT薄膜。使用扫描电子显微镜监测所得多壁碳纳米管膜的形态变化，并显示多壁碳纳米管在膜中随机交织。制备的MWCNT膜直径为17 mm，厚度为20 μ m，表观密度为0.59 g/cm（3）。傅立叶变换红外光谱证实，每个多壁碳纳米管与羧酸和羟基基团的改性是通过酯键交联。使用热重分析（TGA）发现，缩合的MWCNT膜的每单位表观体积（cm（3））的酯交联和纳米管的碳原子数的比率为5.27 × 10（-3）。凝聚的多壁碳纳米管膜的拉伸强度和维氏硬度分别达到15和9.2 MPa的平均值，并大于那些没有酯键的独立的多壁碳纳米管膜。
Multi-walled carbon nanotube (MWCNT) films were prepared by employing a condensation reaction utilizing 1,3-dicyclohexylcarbodiimide (DCC) to cross-link each MWCNT with carboxylic acid and hydroxyl groups. Morphological changes in the resultant MWCNT films were monitored using scanning electron microscopy and showed that the MWCNTs were randomly intertwined in the films. The prepared MWCNT films were 17 mm in diameter and 20 microm in thickness, and the apparent density was 0.59 g/cm(3). Fourier transform-infrared spectroscopy confirmed that each MWCNT modified with carboxylic acid and hydroxyl groups was cross-linked through the ester bond. It was found that the ratio of the number of ester cross-links and carbon atoms of the nanotubes per unit apparent volume (cm(3)) of condensed-MWCNT films was 5.27 x 10(-3) using thermogravimetric analysis (TGA). The tensile strength and Vickers hardness of condensed-MWCNT films achieved an average of 15 and 9.2 MPa, respectively, and were greater than those of free-standing MWCNT films without ester bond.