Scalable Formation of Carbon Nanotube Films Containing Highly Aligned Whiskerlike Crystallites
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- 作者：Anson W. K. Ma ; Jaewook Nam ; Natnael Behabtu ; Francesca Mirri ; Colin C. Young ; Budhadipta Dan ; Dmitri Tsentalovich ; Mainak Majumder ; Li Song ; Yachin Cohen ; Pulickel M. Ajayan ; Matteo Pasquali
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2013
- 出版时间：July 3, 2013
- 年：2013
- 卷：52
- 期：26
- 页码：8705-8713
- 全文大小：605K
- 年卷期：v.52,no.26(July 3, 2013)
- ISSN：1520-5045
文摘
We report the creation of carbon nanotube films from superacids by a scalable process, where film morphology is controlled by initial fluid phases. These films were formed by dip-coating biphasic (isotropic + liquid crystalline) carbon nanotube (CNT) chlorosulfonic acid solutions. Chlorosulfonic acid has low volatility and is therefore removed by solvent extraction instead of conventional drying processes. At intermediate concentrations, the solutions contain liquid crystalline domains which stretch and align streamwise during dip-coating. These elongated domains further act as 鈥渘ucleating sites鈥?for large, aligned whiskerlike crystallites during subsequent solvent extraction. The final films contain highly aligned CNT crystallites embedded in a mesh of randomly oriented CNTs.