Biocompatible silk as natural protein fiber, the presence of large amounts of waste in the production, processing and weaving during and after use. Based on the principle of sustainable development, the research team uses Professor Xu Weilin independent patent equipment, and physical recovered waste silk, preferably retains an excellent structure and properties of silk fibroin body without secondary pollutants. However, physical recycling unmodified silk fibroin powder in multistage polymer composite structure is formed, when high powder content, the lower the mechanical properties of composite materials, limit the full application of the silk fibroin powder. Thus, without chemical modification, and how to improve the toughness of the composite particles of micron-sized filler content challenges remain high. Recently, Textiles University, Wuhan TF Professor Xu Weilin binding theory immersion precipitation and solvent evaporation shaped molding theory, to break the traditional optimization interfacial chemical modification, by a physical forming method of modulating the polymerization the interface between the filler particles and the assembly method with the polymer matrix chains force to prepare a toughened polyurethane / unmodified silk fibroin powder composite film (PU-SF). The work titled \”Fabrication of High-toughness Polyurethane / FibroinComposite without Interfacial Treatment and its Toughening Mechanism\” published in on \”ACS Applied Materials & Interfaces\”, the first author Dr. Zhang Chunhua , corresponding author Professor Professor Liu Xinhe Xu Weilin. Strain curve [123 –
145.1% and 1670.9% ; more conventionalPreparation of composite membranes solvent evaporation method elongation at break and toughness are increased 11733.0% and 6000.0% .