Effect of acidification conditions on the properties of carbon nanotube fibers
Effect of acidification conditions on the properties of carbon nanotube fibers
复制标题
酸化条件对碳纳米管纤维性能的影响
DOI：
10.1016/j.apsusc.2013.11.162
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发表时间：
2014-02-15
影响因子：
6.7
通讯作者：
Zhang, Zuoguang
中科院分区：
文献类型：
--
作者：
Wang, Kun;Li, Min;Zhang, Zuoguang
采用硝酸和硫酸的混合物对干纺法制备的碳纳米管（CNT）纤维进行功能化。研究了酸化条件对CNT纤维电导率和拉伸性能的影响。在最佳混合比例和加工时间下获得了强韧、高导电的碳纳米管纤维，其电导率和拉伸强度分别高达3.2 x 10(4) S/m和1103 MPa。结果表明，酸使 CNT 纤维的表面致密化，并将官能团引入到管上，这两者都有助于提高 CNT 纤维的电导率。红外光谱、拉曼和断裂分析表明，酸化过程对碳纳米管纤维的拉伸性能产生两种竞争效应，一种是通过致密化和官能团增强碳纳米管之间的相互作用而产生的积极贡献，另一种是由于管材结构破坏而产生的负面影响。 (C) 2013 Elsevier B.V. 保留所有权利。
Carbon nanotube (CNT) fibers prepared by dry-spun method were functionalized by mixture of nitric and sulfuric acids. The effects of acidification conditions on the electrical conductivity and tensile properties of CNT fibers were investigated. A strong, high conductive CNT fiber was obtained under the optimal mixture ratio and processing time, with a electrical conductivity and tensile strength up to 3.2 x 10(4) S/m and 1103 MPa, respectively. It showed that the acids densified the surface of the CNT fiber and introduced functional groups onto the tubes, both of which contributed to the conductivity improvement of the CNT fiber. The infrared spectroscopy, Raman and fracture analysis indicated that acidification process resulted in two competitive effects on the tensile properties of CNT fibers, one was the positive contribution by the enhancement of interactions between CNTs through the densification and functional groups, and the other was the negative effect due to the structural destruction of the tubes. (C) 2013 Elsevier B.V. All rights reserved.