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~768 MPa,Young’s modulus of~24 GPa,and toughness of~69 MJ∙m^(–3),respectively.Thus,this established approach has great potentials to fabricate new generation renewable biological fibers with high performance.
基金
supported by the National Key Research and Development Program of China(Nos.2021YFB3502300,2020YFA0908900,and 2021YFF0701800)
the National Natural Science Foundation of China(Nos.22125701,21877104,and 22020102003)
Tsinghua University Spring Breeze Fund(Nos.2021Z99CFZ005)
Grants from Natural Science Foundation of Guangdong Province,China(Nos.2021A1515010253 and 202102020523).
