Nanocomposite fibers of Bombyx Mori silk and single wall carbon nanotubes (SWNT) were produced by the electrospinning process. Regenerated silk fibroin dissolved in a dispersion of carbon nanotubes in formic acid was electrospun into nanofibers. The morphological, chemical and mechanical properties of the electrospun nanofibers were examined by Field Emission Environmental Scanning Electron Microscope (ESEM), Transmission Electron Microscopy (TEM), Fourier Transform Infra Red (FTIR) Spectroscopy, Raman Spectroscopy and microtensile tester. TEM of the reinforced fibers shows that the single wall carbon nanotubes are embedded in the fibers. The mechanical properties of the SWNT reinforced fiber show increases in Young's modulus up to 460 % in comparison with the as-spun aligned fiber, but at the expense of the strength and strain to failure.
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