Scalable Spider-Silk-Like Supertough Fibers using a Pseudoprotein Polymer

Area of Science:

• Materials Science
• Biomaterials Engineering
• Polymer Chemistry

Background:

• Spider silks possess exceptional toughness, making them highly desirable for industrial applications.
• Artificial production of spider silk faces challenges in achieving high fracture energy and scalability due to low productivity and high costs.

Purpose of the Study:

• To develop a facile and scalable chemical synthesis strategy for producing supertough artificial spider silk fibers.
• To mimic the structural properties of natural spider silk for enhanced material performance.

Main Methods:

• Utilized a chemical synthesis route to create pseudoprotein polymers.
• Incorporated both β-sheet crystals and α-helical peptides simultaneously within the polymer structure.

Main Results:

• Achieved supertoughness with a fracture energy of approximately 387 MJ m⁻³.
• The resulting fibers exhibit toughness more than double that of common spider dragline silk.
• The material's toughness is comparable to the aciniform silk of Argiope trifasciata.

Conclusions:

• The reported chemical synthesis strategy offers a promising and scalable approach for producing high-performance artificial spider silk.
• This method overcomes limitations of previous genetically engineered spider-silk protein production.
• The developed pseudoprotein polymer demonstrates potential for creating advanced supertough fibers.