Multifunctional macroarchitectures of double-walled carbon nanotube fibers

A study was conducted to demonstrate a drawing-drying process for the fabrication of double-walled carbon nanotubes (DWNT) and investigate their multifunctional capabilities. A drawing-drying process was introduced to spin nanotube yarns from the wet DWNT cotton. Heat treatment under argon gas was performed for one hour at 150°C, to completely remove water content inside the fibers, after the spinning process was performed. The process was able to further can further compact the nasnotube bundles. Microscopic characterization of the DWNT fibers and low-magnification scanning electron microscopy investigations showed that the size of the microstructures of DWNT had undergone significant change.