期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 42, 页码 37112-37119出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b09287
关键词
carbon nanotube fibers; superacid; tactoids; mechanical strength; electrical conductivity; extensional viscosity
资金
- Temasek Laboratory@NUS-Singapore [R-394-001-077-232, R-265-000-514-28]
- Air Force Office of Scientific Research (AFOSR) grant [FA9550-15-1-0370]
- Welch Foundation [C-1668]
- NASA Space Technology Research Fellowship [NSTRF14, NNX14AL71H]
In this study, we apply a simple but effective oxidative purification method to purify carbon nanotube (CNT) fibers synthesized via a floating catalyst technique. After the purification treatment, the resulting CNT fibers exhibited significant improvements in mechanical and electrical properties with an increase in strength, Young's modulus, and electrical conductivity by approximately 81, 230, and 100%, respectively. With the successful dissolution of the CNT fibers in superacid, an extensional viscosity method could be applied to measure the aspect ratio of the CNTs constituting the fibers, whereas high-purity CNT thin films could be produced with a low resistance of 720 Omega/sq at a transmittance of 85%. This work suggests that the oxidative purification approach and dissolution process are promising methods to improve the purity and performance of CNT macroscopic structures.
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