期刊
CARBON
卷 49, 期 6, 页码 1859-1868出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2011.01.008
关键词
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资金
- National Science Foundation [CMMI-0826067]
- National Textile Center [M10-CL3]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0826067] Funding Source: National Science Foundation
A method is described for the wet spinning of alginate fibers with a loading of single-walled carbon nanotubes as high as 23 wt%. Electrostatic assembling of polyelectrolytes and nanotubes coated with sodium dodecyl sulfate is exploited by using calcium as a cross-linking agent. The Young's modulus of these fibers depends non-monotonically on nanotube concentration which is explained using Halpin-Tsai and Voigt models. Scanning electron microscope micrographs and resistivity analysis of the fibers suggest that the nanotube-alginate system undergoes a morphological transition from a composite structure of discrete nanotube bundles embedded in an alginate matrix to a complex continuous structure consisting of a nanotube network interwoven into a macromolecular network of alginate. The nanotube-alginate fibers have unprecedented high flexibility and a very high electrical conductivity similar to semimetals (between germanium and carbon). Published by Elsevier Ltd.
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