Labor Protection Exhibition|Breakthrough Achieved in Mass Production of Artificial Spider Silk
Recently, a research team jointly formed by City University of Hong Kong and the Shenzhen Peking University-The Hong Kong University of Science and Technology Medical Center has made significant progress in the field of high-performance biomimetic materials. After five years of dedicated efforts, the team has successfully developed a recombinant spider silk fiber with ultra-high strength, excellent toughness, and good environmental stability, marking a critical step toward scaling up artificial spider silk from the laboratory to practical applications. This achievement is expected to be showcased at the upcoming Labor Protection Exhibition, highlighting its potential in safety and protective material innovations.
Natural spider silk, capable of bearing a weight of 5 tons per square centimeter, has long been regarded as the "holy grail" in materials science. However, due to the difficulties in farming spiders and their extremely low silk output, scientists have been striving to synthesize spider silk proteins and spin fibers through bioengineering approaches. Previous artificial spider silk often suffered from insufficient molecular weight, loose structure, and high sensitivity to moisture, which severely limited its practical use.
This research innovatively adopted a "peripheral cysteine locking" molecular design strategy, combined with an aqueous-phase biomimetic spinning process, successfully mimicking the natural transformation from liquid silk protein to solid fiber within spiders. The team abandoned traditional organic solvent systems and instead achieved protein self-assembly in an aqueous environment by precisely regulating pH and ion concentration, while introducing disulfide bonds to enhance the structural stability of the fiber.
The resulting recombinant spider silk fiber demonstrates three outstanding advantages: significantly improved humidity stability, effectively resisting moisture-induced structural degradation; simultaneous high strength and high toughness, with mechanical properties close to those of natural spider silk; and programmable functionality, enabling reversible deformation in response to humidity changes, suitable for smart actuation scenarios. Moreover, the process is compatible with microfluidic technology and has preliminarily achieved continuous spinning, laying the foundation for future industrial production.
In terms of applications, the material shows broad prospects. In biomedicine, its pure protein composition, controllable degradability, and low immunogenicity make it an ideal candidate for surgical sutures and tissue engineering scaffolds. The team has already completed preliminary validation in mouse gastric surgery. In soft robotics, its high recovery stress and flexibility can simulate human muscle bundles, holding promise for developing a new generation of artificial muscles or micro-actuators. Additionally, it has potential in emerging fields such as smart textiles and flexible sensing. The material's durability and adaptability may also attract attention from the Labor Protection Exhibition, where next-generation safety gear and wearable tech are key themes.
This achievement not only addresses the long-standing performance shortcomings of artificial spider silk but also establishes a complete technical pathway from molecular design and green manufacturing to functional integration. It signifies that China has advanced into the international forefront in high-end biomimetic materials and may catalyze multiple new interdisciplinary application fields.
Source：Toutiao
