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- W4385513900 abstract "Abstract Poly(p‐phenylene‐benzimidazole‐terephthalamide) (PBIA) fibers with excellent mechanical properties are widely used in fields that require impact‐resistant materials such as ballistic protection and aerospace. The introduction of heterocycles in polymer chains increases their flexibility and makes it easier to optimize the fiber structure during spinning. However, the inadequate orientation of polymer chains is one of the main reasons for the large difference between the measured and theoretical mechanical properties of PBIA fibers. Herein, carbon nanotubes (CNTs) are selected as an orientation seed. Their structural features allow CNTs to orient during the spinning process, which can induce an orderly arrangement of polymers and improve the orientation of the fiber microstructure, including in the crystalline and amorphous regions. To ensure the complete one‐dimensional topology of long CNTs (∼10 μm), PBIA is used as an efficient dispersant to overcome dispersion challenges. The p‐CNT/PBIA fibers (10 μm‐SWNT 0.025 wt%) exhibit an increase of 22% in tensile strength and 23% in elongation, with a maximum tensile strength of 7.01±0.31 GPa and a reinforcement efficiency of 893.6. The artificial muscle fabricated using CNT/PBIA fibers exhibits a 34.8% contraction and a 25% lifting of a 2 kg dumbbell, providing a promising paradigm for high‐performance organic fibers as high‐load smart actuators. This article is protected by copyright. All rights reserved" @default.
- W4385513900 created "2023-08-04" @default.
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- W4385513900 date "2023-08-02" @default.
- W4385513900 modified "2023-09-27" @default.
- W4385513900 title "Carbon Nanotube‐Directed 7‐GPa Heterocyclic Aramid Fiber And Its Application in Artificial Muscles" @default.
- W4385513900 doi "https://doi.org/10.1002/adma.202306129" @default.
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