文献类型：期刊文献

英文题名：High-Strength Carbon Nanotube Fibers from Purity Control by Atomized Catalytic Pyrolysis and Alignment Improvement by Continuous Large Prestraining

作者：Shi, Hong Liang[1];Shi, Qiang Qiang[1];Zhan, Hang[1];Ai, Jin Jin[1];Chen, Yu Ting[1];Wang, Jian Nong[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：23

期号：23

起止页码：10739

外文期刊名：NANO LETTERS

收录：;EI(收录号：20234915185449);WOS:【SCI-EXPANDED(收录号:WOS:001125325700001)】；

基金：This research was supported by the National Key R&D Program of China (2022YFA1200075 and 2018YFA0208404), the National Natural Science Foundation of China (52172089), and the Innovation Program of Shanghai Municipal Education Commission.

语种：英文

外文关键词：carbon nanotube fiber; highstrength; ultrasonicatomization; continuous prestraining; densification

摘要：Transferring the high strength of individual carbon nanotubes (CNTs) to macroscopic fibers is still a major technical challenge. In this study, CNT fibers are wound from a hollow cylindrical assembly. In particular, atomized catalytic pyrolysis is utilized to produce the fiber and control its purity. The pristine fiber is then continuously prestrained to have a highly aligned structure for subsequent full densification. Experimental measurements show that the final fiber possesses a high tensile strength (8.0 GPa), specific strength (5.54 N tex(-1) (tex: the weight (g) of a fiber of 1 km long)), Young's modulus (350 GPa), and elongation at break (4%). Such an excellent combination is superior to that of any other existing fiber and attributed to the efficient stress transfer among the highly aligned and packed CNTs. Our study provides a new strategy involving atomized catalysis for developing superstrong CNT assemblies such as fibers and films for practical applications.