Carbon nanotube fibers with dynamic strength up to 14 GPa

• 成果类型: Article
• 署名作者: Zhang, Xinshi; Lei, Xudong; Jia, Xiangzheng; Sun, Tongzhao; Luo, Jiajun; Xu, Shichen; Li, Lijun; Yan, Dan; Shao, Yuanlong; Yong, Zhenzhong; Zhang, Yongyi; Wu, Xianqian; Gao, Enlai; Jian, Muqiang; Zhang, Jin
• 署名单位: Peking University; Beijing Graphene Institute; Chinese Academy of Sciences; Institute of Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Wuhan University; Ningxia University; Chinese Academy of Sciences; Suzhou Institute of Nano-Tech & Nano-Bionics, CAS; Chinese Academy of Sciences; University of Science & Technology of China, CAS
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-12031
• DOI: 10.1126/science.adj1082
• 发表日期: 2024-06-21
• 页码: 1318-1323
• 关键词: mechanical-properties; failure mechanisms; performance; graphene; yarns

摘要

High dynamic strength is of fundamental importance for fibrous materials that are used in high-strain rate environments. Carbon nanotube fibers are one of the most promising candidates. Using a strategy to optimize hierarchical structures, we fabricated carbon nanotube fibers with a dynamic strength of 14 gigapascals (GPa) and excellent energy absorption. The dynamic performance of the fibers is attributed to the simultaneous breakage of individual nanotubes and delocalization of impact energy that occurs during the high-strain rate loading process; these behaviors are due to improvements in interfacial interactions, nanotube alignment, and densification therein. This work presents an effective strategy to utilize the strength of individual carbon nanotubes at the macroscale and provides fresh mechanism insights.