Details

Autor(en) / Beteiligte

• Lee, Dongju
• Kim, Seo Gyun
• Hong, Seungki
• Madrona, Cristina
• Oh, Yuna
• Park, Min
• Komatsu, Natsumi
• Taylor, Lauren W
• Chung, Bongjin
• Kim, Jungwon
• Hwang, Jun Yeon
• Yu, Jaesang
• Lee, Dong Su
• Jeong, Hyeon Su
• You, Nam Ho
• Kim, Nam Dong
• Kim, Dae-Yoon
• Lee, Heon Sang
• Lee, Kun-Hong
• Kono, Junichiro
• Wehmeyer, Geoff
• Pasquali, Matteo
• Vilatela, Juan J
• Ryu, Seongwoo
• Ku, Bon-Cheol

Titel

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

Ist Teil von

• Science advances, 2022-04, Vol.8 (16), p.eabn0939-eabn0939

Ort / Verlag

United States: AAAS

Erscheinungsjahr

2022

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• 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 combination of high tensile strength (6.57 GPa), modulus (629 GPa), thermal conductivity (482 W/m·K), and electrical conductivity (2.2 MS/m), thereby overcoming the limits associated with conventional synthetic fibers.