Establishing superfine nanofibrils for robust polyelectrolyte artificial spider silk and powerful artificial muscles

Wenqian He, Meilin Wang, Guangkai Mei, Shiyong Liu, Abdul Qadeer Khan, Chao Li, Danyang Feng, Zihao Su, Lili Bao, Ge Wang, Enzhao Liu, Yutian Zhu, Jie Bai, Meifang Zhu (), Xiang Zhou () and Zunfeng Liu ()
Additional contact information
Wenqian He: Nankai University
Meilin Wang: Nankai University
Guangkai Mei: Nankai University
Shiyong Liu: Nankai University
Abdul Qadeer Khan: Nankai University
Chao Li: Nankai University
Danyang Feng: Nankai University
Zihao Su: Nankai University
Lili Bao: China Pharmaceutical University
Ge Wang: Nankai University
Enzhao Liu: The Second Hospital of Tianjin Medical University
Yutian Zhu: Hangzhou Normal University
Jie Bai: Inner Mongolia University of Technology
Meifang Zhu: Donghua University
Xiang Zhou: China Pharmaceutical University
Zunfeng Liu: Nankai University

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: 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.

Date: 2024
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DOI: 10.1038/s41467-024-47796-2

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