Artificial Spider Silk with Buckled Sheath by Nano‐Pulley Combing

• DOI: 10.1002/adma.202212112
• Publication Date: 2023-06-16T14:15:41Z
• Authors: Jinkun Sun; Wenjin Guo; Guangkai Mei; Songli Wang; Kai Wen; Meilin Wang; Danyang Feng; Dong Qian; Meifang Zhu; Xiang Zhou; Zunfeng Liu
• Keywords: Combing; Spider Silk

The axial orientation of molecular chains always results in an increase fiber strength and a decrease toughness. Here, taking inspiration from the skin structure, artificial spider silk with buckled sheath-core structure is developed, mechanical toughness reaching 1.61 GPa 466 MJ m-3 , respectively, exceeding those Caerostris darwini silk. achieved by nano-pulley combing polyrotaxane hydrogel fibers through cyclic stretch-release training, which exhibits alignment polymer core buckling sheath. also excellent supercontraction behavior, achieving work capacity 1.89 kJ kg-1 actuation stroke 82%. This provides new strategy for designing high-performance intelligent materials.