Journal
MACROMOLECULAR MATERIALS AND ENGINEERING
Volume 301, Issue 1, Pages 48-55Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.201500217
Keywords
electrospinning; mechanical properties; secondary structure; side-by-side fibers; silk fibroin
Funding
- Deutsche Forschungsgemeinschaft (DFG) [SFB 840]
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1D fibers of Bombyx mori silk fibroin (SF) and poly(L-lactide) (SF-s-PLLA) with side-by-side parallel arrangement of the two components in a single fiber made by electrospinning are presented. The side-by-side arrangement in both randomly oriented and aligned two-in-one fibers was confirmed by scanning electron and confocal laser scanning microscope studies. The molecular orientation and secondary structure of SF and PLLA were dependent on the fiber alignment and annealing conditions. The two sides retained their individual secondary structure before and after annealing without affecting each other in a significant way. The two-in-one fibers after post treatment with methanol and heat at 80 degrees C showed tensile strength 16.5 +/- 1.4 MPa, modulus 205 +/- 20.6 MPa, and an elongation at break of 53 +/- 8%.
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