Tufts Researchers Forge Silk Composite Stronger Than Bone, Beating Carbon Fiber in Ballistic Tests
Updated
Updated · Earth.com · May 25
Tufts Researchers Forge Silk Composite Stronger Than Bone, Beating Carbon Fiber in Ballistic Tests
2 articles · Updated · Earth.com · May 25
Tufts-led researchers fused silkworm silk into a dense solid that outperformed bone and wood in tensile toughness and withstood ballistic impacts better than carbon-fiber composites.
Heat and pressure—about 257-419°F and 1,900-9,800 atmospheres—bonded aligned natural fibers without dissolving them, preserving silk’s crystalline structure that conventional chemical processing weakens.
The resulting material is renewable, biodegradable and near Kevlar in toughness, giving industries a lighter alternative to petroleum-based composites used in aircraft, vehicles and sports gear.
Animal implant tests showed only mild immune responses that faded over time, while varying fusion density let researchers tune how quickly the material degrades for tissue repair or longer-term bone supports.
University of Michigan tests also found the fused silk polarizes terahertz radiation, pointing to possible roles in medical imaging, scanners and eventually 6G communications.
Could this biodegradable silk be the surprising key to building future 6G wireless technology?
Can the world's silkworms realistically produce enough material to replace plastics and Kevlar?
Is the energy needed to create 'fused silk' a hidden flaw in its eco-friendly promise?
Ultra-Strong, Biodegradable Silk Developed: Solvent-Free Process Delivers Sustainable Alternative to Kevlar and Plastics
Overview
Researchers from Tufts University, Imperial College London, and the University of Michigan have developed a new method to create ultra-strong, biodegradable silk-based materials. This breakthrough uses a novel processing technique that forms robust silk fibers without harsh solvents, making the material environmentally friendly. The resulting silk retains its natural crystalline regions and protein structures, allowing stress to transfer efficiently and giving it exceptional strength that approaches the toughness of Kevlar. This innovation, published in Nature Sustainability, marks a major step toward advanced materials that meet high performance standards while supporting sustainability.