Mechanical properties enhanced by solid-state coupling reaction for molecular covalent bridges of carbon nanotube fibers
| Autor: | Hungo Choo, Ok-Kyung Park, Bon-Cheol Ku, Youngjin Jeong, Hyunju Kim, Hwan Chul Kim, Nam-Ho You, Jae Kwan Lee |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Mechanical Engineering Solid-state 02 engineering and technology Carbon nanotube Thermal treatment 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Coupling reaction 0104 chemical sciences law.invention Mechanics of Materials Covalent bond Electrical resistivity and conductivity law Chemical functionalization Ultimate tensile strength General Materials Science Composite material 0210 nano-technology |
| Zdroj: | Materials Letters. 211:243-246 |
| ISSN: | 0167-577X |
| Popis: | Carbon nanotubes (CNTs) exhibit outstanding mechanical and electrical properties. However, CNT fibers (CNTFs) have still problems in realizing these properties because of the weak forces between nanotubes with many defects of individual CNTs. Here, we report a solid-state coupling reaction with an iodophenyl motif to investigate molecular covalent bridging in CNTFs. The stepwise thermochemical processes were chemical functionalization followed by thermal treatment of CNT surface to induce solid-state coupling reaction for molecular bridge of CNTFs. These molecular-bridged CNTFs presented phenomenal boost in mechanical tensile strength (0.93 N/tex) which is 132% higher than pristine CNTFs without a decrease in electrical conductivity (870 S/cm). |
| Databáze: | OpenAIRE |
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