Journal
ACS BIOMATERIALS SCIENCE & ENGINEERING
Volume 1, Issue 7, Pages 577-584Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsbiomaterials.5b00092
Keywords
spider silk; spinning; mechanical properties; XRD; process development
Categories
Funding
- USTAR
- National Science Foundation
- Department of Energy
- Directorate For Engineering
- Div Of Industrial Innovation & Partnersh [1318194] Funding Source: National Science Foundation
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Spider silks have unique mechanical properties but current efforts to duplicate those properties with recombinant proteins have been unsuccessful. This study was designed to develop a single process to spin fibers with excellent and consistent mechanical properties. As-spun fibers produced were brittle, but by stretching the fibers the mechanical properties were greatly improved. A water-dip or water-stretch further increased the strength and elongation of the synthetic spider silk fibers. Given the promising results of the water stretch, a mechanical double-stretch system was developed. Both a methanol/water mixture and an isopropanol/water mixture were independently used to stretch the fibers with this system. It was found that the methanol mixture produced fibers with high tensile strength while the isopropanol mixture produced fibers with high elongation.
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