标题 Biological composite fibers with extraordinary mechanical strength and toughness mediated by multiple intermolecular interacting networks
来源期刊 Nano Research
摘要 Numerous strategies involving multiple cross-linking networks have been applied for fabricating robust hydrogels. Inspired by this, the development of mechanically strong and tough biological fibers by the incorporation of intermolecular linking networks is becoming important. Herein, we present a versatile strategy for the fabrication of protein-saccharide composite fibers through protein-initiated double interacting networks. Three types of lysine-rich bioengineered proteins were introduced and the present multiple cross-linking interactions including electrostatic forces and covalent bonds significantly enhanced the mechanical properties of as-obtained composite fibers. In stark contrast to pristine saccharide or other polymer fibers, the as-obtained composite fibers exhibited outstanding mechanical performance, showing a breaking strength of similar to 768 MPa, Young's modulus of similar to 24 GPa, and toughness of similar to 69 MJ.m(-3), respectively. Thus, this established approach has great potentials to fabricate new generation renewable biological fibers with high performance.