PDF(Pubmed)
Abstract：
Spider silk exhibits an excellent combination of high strength and toughness, which originates from the hierarchical self-assembled structure of spidroin during fiber spinning. In this work, superfine nanofibrils are established in polyelectrolyte artificial spider silk by optimizing the flexibility of polymer chains, which exhibits combination of breaking strength and toughness ranging from 1.83 GPa and 238 MJ m-3 to 0.53 GPa and 700 MJ m-3, respectively. This is achieved by introducing ions to control the dissociation of polymer chains and evaporation-induced self-assembly under external stress. In addition, the artificial spider silk possesses thermally-driven supercontraction ability. This work provides inspiration for the design of high-performance fiber materials.
摘要：
蜘蛛丝表现出优异的高强度和韧性的结合，这源于纤维纺丝过程中蛛丝蛋白的分层自组装结构。在这项工作中,通过优化聚合物链的柔性，在聚电解质人工蜘蛛丝中建立了超细纳米原纤维，其断裂强度和韧性的组合范围分别为1.83GPa和238MJm-3至0.53GPa和700MJm-3。这是通过引入离子来控制聚合物链的解离和在外部应力下蒸发诱导的自组装来实现的。此外,人工蜘蛛丝具有热驱动的超收缩能力。这项工作为高性能纤维材料的设计提供了灵感。
