Blending of Recombinant Spider Silk with Nylon 6,6 for Improved Mechanical Properties

Technical Summary

•  Dr. Randy Lewis and Dr. Justin Jones of the Biology department at Utah State University have combined Nylon 6,6 with recombinant spider silk proteins (rSSP) to improve the mechanical and material properties of the fiber.

•  The addition of only 2.5-10 wt.% of MaSp1 leads to an increase in the mechanical properties (in terms of elastic modulus, tensile strength and ultimate tensile strength) of electrospun, nylon, nanofiber yarns by almost 50%. Dopes of nylon 6,6 and MaSp1 are prepared in formic acid and are electrospun into nanofibers. The formed mats are twisted into yarns, which are characterized by SEM, FTIR, DSC, XRD, and mechanical test measurements.


Commercial Applications

•  Potential uses for spider silk:

•  High performance fabrics

•  Advanced composites

•  Lightweight and strong ropes and yarns


Competitive Advantages

•  Provides improved mechanical properties over nylon, particularly tensile strength

•  Small amount of rSSP has large effect on nylon properties

•  Spider silk is 5x stronger than steel and nearly 3x the “energy to break” as Kevlar

•  Nylon 6,6 may now be used in expanded applications


Related Technologies

•  Method for Upregulation of Synthetic Spider Silk Production in E. coli (P13014)

•  Method for Solubilizing Spider Silk Proteins in Aqueous Solutions (P13025)

•  Applications for Solubilized Spider Silk Proteins in Aqueous Solutions (P14002)

•  Apparatus for Synthetic Spider Silk Fiber Formation (P14036)

•  Method for Producing Spider Silk Proteins in E. coli (P15011)

•  Recombinant Spider Silk Protein Coating for Intravenous Catheters (P16025)




Patent Information:
For Information, Contact:
Christian Iverson
Utah State University
Justin Jones Randolph Lewis Ibrahim Hassounah Ethan Abbott
Biotechnology Material Science Spider Silk