Spinning continuous carbon nanotube yarns

Monitoring a Micromechanical Process in Macroscale Carbon Nanotube Films and Fibers

“…For example, prior to 2007, the reported tensile strengths of continuous CNT fibers without a coagulant lay in the range from 0.4 to 1.2 GPa, no matter if they were spun from a suspension. [5][6][7][8][9][10][11][12] Recently, Windle et al reported the synthesis of continuous high-performance CNT fibers with the highest strength value of 9 GPa. [12] This encouraging breakthrough enlightens the use of macroscale CNTs fibers as a structural reinforcement for many applications.…”

“…Figure 1 shows a typical twisting process. Compared with the existing spinning methods developed by other groups, [5][6][7][8][9][10][11] our twisting method may not be suitable for continuous production of CNT fibers, but the control of the diameters and twisting degrees is more convenient. So the fabricated fibers are ideal systems for the study of CNT macroarchitectures.…”

“…In 2004, Baughman's group improved the Fan's array-spinning technique, and realized the importance of the twisting process for the synthesis of macroscale CNT fibers. [4,7] They stated that the twisted CNTs generated lateral force, which then gave rise to nanometer-scale friction force to couple these tens-of micrometers-long CNT bundles together as a continuous fiber. After that, the enhancement effects of the twisting structures to the fibers' mechanical properties were also verified by some other researchers.…”

Spinning and Processing Continuous Yarns from 4‐Inch Wafer Scale Super‐Aligned Carbon Nanotube Arrays

“…Currently many groups have achieved the growth of CNT arrays, [9,10] but of these only two groups have reported spinning yarns from their arrays. [5][6][7] The first question is why our CNT arrays can give rise to CNT yarn while others cannot? What is the critical factor that determines the ability for yarn formation?…”

Fiber‐Type Solar Cells, Nanogenerators, Batteries, and Supercapacitors for Wearable Applications

“…Therefore, the fiber electrodes should be (a) highly conductive to ensure rapid charge transfer, and (b) highly flexible and bendable to endure weaving and other stresses during their integration and service time. To accomplish this goal, CNT based fiber electrodes were recently developed 114, 115, 116. The CNTs spun into fibers satisfy the requirements such as high electrical conductivity, tensile strength, flexibility, and light‐weight for fiber LIBs (FLIBs).…”