期刊
SMALL
卷 5, 期 5, 页码 536-542出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.200801440
关键词
carbon fibers; electrospinning; mechanical strength; nanofibers; processing
类别
资金
- (US) National Aeronautics and Space Administration [NNX07AT52A]
- (US) National Science Foundation [CBET-0827844]
- National Natural Science Foundation of China [50333070, 50673011]
- National High Technology Research and Development Program of China [2006AA06Z382]
- National Basic Research Program of China [2006CB605304]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [0827844] Funding Source: National Science Foundation
Continuous nanoscale carbon fibers can be developed by stabilization and carbonization of highly aligned and extensively stretched electrospun polyacrylonitrile copolymer nanofiber precursor under optimal tension. These carbon fibers, with diameters of tens of nanometers, are expected to possess a superior mechanical strength that is unlikely to be achieved through conventional approaches. This is because i) the innovative precursor, with a fiber diameter approximately 100 times smaller than that of conventional counterparts, possesses an extremely high degree of macromolecular orientation and a significantly reduced amount of structural imperfections, and ii) the ultrasmall fiber diameter also effectively prevents the formation of structural inhomogeneity, particularly sheath/core structures during stabilization and carbonization.
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