期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 87, 期 -, 页码 77-85出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2013.08.001
关键词
Carbon fibres; Nano composites; Mechanical properties; Electrical properties; Microstructure
资金
- National Natural Science Foundation of China [51073019]
- Program for New Century Excellent Talents in University [NCET-12-0761]
- National High-tech R&D Program of China (863 Program) [2012AA03A203]
Continuous polyacrylonitrile-based nano-fibres are produced by an electrospinning approach and then converted to nano-scale carbon fibres (n-CFs) with a homogeneous structure by introducing multi-step hot-stretching in this paper. The processed n-CFs are highly aligned and partially graphitic, yet obtained at a temperature range normally associated with carbonization, and show remarkably uniform structures and a quite smooth surface with a mean roughness of 0.249 nm. The electrical conductivity of the n-CFs reaches 15.5 S/cm along the fibre direction. Tensile tests demonstrate an enhancement of 21% and 60% in tensile strength and Young's modulus, respectively, of polyetherimide composite membranes containing 1 wt% n-CFs treated with multi-step hot-stretching, which is more remarkable reinforcing effect compared to the multi-walled carbon nanotubes. It is believed that the developed approach, electrospinning and multi-step hot-stretching technique, can be a practicable means for the fabrication of continuous n-CF reinforcement with high structural integrity and desirable properties. (C) 2013 Elsevier Ltd. All rights reserved.
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