Cho, Hyunjung Lee, Jinwoo Lee, Haemin Lee, Sung-Hyun Park, Junbeom Lee, Cheol-Hun Lee, Kun-Hong 2024-01-19T21:31:50Z 2024-01-19T21:31:50Z 2021-09-05 2018-11 1996-1944 https://pubs.kist.re.kr/handle/201004/120732 To increase the strength of carbon nanotube (CNT) fibers (CNTFs), the mean size of voids between bundles of CNTs was reduced by wet-pressing, and the CNTs were cross-linked. Separate and simultaneous physical (roller pressing) and chemical methods (cross-linking) were tested to confirm each method's effects on the CNTF strength. By reducing the fraction of pores, roller pressing decreased the cross-sectional area from 160 mu m(2) to 66 mu m(2) and increased the average load-at-break from 2.83 +/- 0.25 cN to 4.41 +/- 0.16 cN. Simultaneous injection of crosslinker and roller pressing augmented the cross-linking effect by increasing the infiltration of the crosslinker solution into the CNTF, so the specific strength increased from 0.40 +/- 0.05 N/tex to 0.67 +/- 0.04 N/tex. To increase the strength by cross-linking, it was necessary that the size of the pores inside the CNTF were reduced, and the infiltration of the solution was increased. These results suggest that combined physical and chemical treatment is effective to increase the strength of CNTFs. English MDPI SPUN YARNS MECHANICAL-PROPERTIES STRENGTH FUNCTIONALIZATION ALIGNMENT TWIST Effects of Wet-Pressing and Cross-Linking on the Tensile Properties of Carbon Nanotube Fibers Article 10.3390/ma11112170 1 MATERIALS, v.11, no.11 MATERIALS 11 11 scie scopus 000451755500105 2-s2.0-85055982956 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Physics, Applied Physics, Condensed Matter Chemistry Materials Science Metallurgy & Metallurgical Engineering Physics Article SPUN YARNS MECHANICAL-PROPERTIES STRENGTH FUNCTIONALIZATION ALIGNMENT TWIST densification capillary pressure cross-linking reaction specific strength