Emergence of supercontraction in regenerated silkworm (Bombyx mori) silk fibers
Resumen: The conditions required for the emergence of supercontraction in regenerated silkworm (Bombyx mori) silk fibers are assessed through an experimental approach that combines the spinning of regenerated fibers with controlled properties and their characterization by 13 C solid-state nuclear magnetic resonance (NMR). Both supercontracting and non-supercontracting regenerated fibers are produced using the straining flow spinning (SFS) technique from 13 C labeled cocoons. The short-range microstructure of the fibers is assessed through 13 C CP/MAS in air and 13 C DD/MAS in water, and the main microstructural features are identified and quantified. The mechanical properties of the regenerated fibers and their microstructures are compared with those of natural silkworm silk. The combined analysis highlights two possible key elements as responsible for the emergence of supercontraction: (1) the existence of an upper and a lower limit of the amorphous phase compatible with supercontraction, and (2) the existence of two ordered phases, ß-sheet A and B, which correspond to different packing arrangements of the protein chains.
Idioma: Inglés
DOI: 10.1038/s41598-019-38712-6
Año: 2019
Publicado en: Scientific reports 9 (2019), 2398 [14 pp.]
ISSN: 2045-2322

Factor impacto SCIMAGO:

Financiación: info:eu-repo/grantAgreement/ES/MINECO/DPI2016-78887-C3-1-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2016-75544-C2-1-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2016-79832-R
Tipo y forma: Article (Published version)

Creative Commons You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.


Exportado de SIDERAL (2019-07-09-14:34:08)

Este artículo se encuentra en las siguientes colecciones:
Articles



 Record created 2019-07-09, last modified 2019-07-09


Versión publicada:
 PDF
Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)