Abstract
A type of high-yield multi-walled carbon nanotubes (MWNTs) with a diameter of 4–13 nm was prepared by cracking propylene over Co-Mo/Al2O3-MgO catalyst. The pristine MWNTs were well dispersed in N-Methyl-Pyrrolidone (NMP) solution of an oil soluble non-ion surfactant. Then the MWNT dispersion was extruded out of a spinneret into a rotating water coagulation bath to form a free-standing gel fiber with ribbon shape. The surfactant was insoluble in water while NMP was miscible with water, which promoted the formation of gel fiber. When the gel fiber was dried, a solid MWNT-surfactant composite fiber was obtained. The composite fiber had certain flexibility. However, the tensile strength was only 15.6 ± 1.3 MPa, which was mainly limited by the weak orientation of MWNTs along the fiber and the lack of compactness of MWNTs inside the fiber. In addition, the electrothermal properties of the 3 cm MWNT-surfactant composite fiber as wire heater were also evaluated. The composite fiber possessed rapid temperature response under different voltages. The steady-state temperature reached 48.1 °C, 74.0 °C and 100.2 °C, respectively, at 10 V, 15 V and 17.5 V.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.