期刊
CARBON
卷 96, 期 -, 页码 701-710出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2015.10.002
关键词
Carbon nanotubes; Hierarchical reinforcement; Covalent grafting; Advanced composites; Flexible supercapacitor
资金
- Australian Research Council's Discovery Projects [DP130103958]
A novel chemical method was developed to graft carbon nanotubes (CNTs) onto carbon fiber (CF) by direct covalent bonding to form a CNT-CF hierarchical reinforcing structure. The grafting via ester linkage (formed at a low temperature of 70 degrees C without using any contaminating catalyst or coupling agent) was evidenced by SEM, FTIR, RAMAN, XPS and XRD spectroscopy. The CNT failure stress obtained from in situ SEM pulling out experiments varied from 25 to 31 GPa, depending on the grafting reaction conditions. CNT fracture was the only breaking mechanism observed from the pulling out experiments indicating an existence of a strong carbon carbon covalent bonding at the CNT CF interface and the real grafting strength was actually higher than the measured failure stress. This high grafting strength can significantly increase the interfacial and impact properties desirable in next generation advanced aerospace composite structures. Further, the CNT attachments on CF led to increased electrochemical capacitance properties by rapid ion diffusion through active CNT sites and defects created during grafting. The fibrous film of CNT CF exhibits a specific capacitance that is 3.5 times greater than that of CF, indicating substantial promise as a material for fabricating textile supercapacitors with superior strength, flexibility and performance. (C) 2015 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据