Ultrahigh strength, modulus, and conductivity of graphitic fibers by macromolecular coalescence.

ABSTRACT: Theoretical considerations suggest that the strength of carbon nanotube (CNT) fibers be exceptional; however, their mechanical performance values are much lower than the theoretical values. To achieve macroscopic fibers with ultrahigh performance, we developed a method to form multidimensional nanostructures by coalescence of individual nanotubes. The highly aligned wet-spun fibers of single- or double-walled nanotube bundles were graphitized to induce nanotube collapse and multi-inner walled structures. These advanced nanostructures formed a network of interconnected, close-packed graphitic domains. Their near-perfect alignment and high longitudinal crystallinity that increased the shear strength between CNTs while retaining notable flexibility. The resulting fibers have an exceptional co

SUBMITTER: Lee D 

PROVIDER: S-EPMC9032978 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature