A perspective on high-performance CNT fibres for structural composites

Research on the interface properties and strengthening–toughening mechanism of nanocarbon-toughened ceramic matrix composites

“…Michálková et al explain that the Young's modulus of graphene containing several layers is considerably lower than that of singlelayer graphene, and the Young's modulus significantly influences the fracture toughness of composites [94]. Generally, the modulus of CNTs are scaled according to their length, so scholars have stretched pre-CNT to enhance its strength [95,96]. Han et al report that 3D CNT scaf folds re- inforce SiC-BCN composites [53].…”

Understanding cooperative loading in carbon nanotube fibres through in-situ structural studies during stretching

“…The organization of CNTs into aligned fibres is recognised as a natural embodiment for a 1D material and the most effective to transfer axial properties to the bulk, similar to the architecture of high-performance polymer fibres. Indeed, optimisation of experimental parameters during synthesis and spinning have led to CNT fibres with specific longitudinal tensile strength and modulus in the range of 1.5 − 2.5 GPa/SG and 160 − 250 GPa/SG, respectively, which can further increase after post-pinning chemical treatment [1]. Yet, the continuous improvement in tensile properties of CNT fibres over the last two decades has been achieved almost entirely by trial and error.…”

Morphology, thermal, and crystallization analysis of polylactic acid in the presence of carbon nanotube fibers with tunable fiber loadings through polymer infiltration

“…Typical formats include kilometer‐long thin filaments (10 μm‐diameter) or unidirectional fabrics about 1 m wide. More importantly, macroscopic fibers and fabrics have mass‐normalized conductivity above metals, comparable tensile strength and modulus to carbon fibers, and superior tensile fracture than Kevlar (reference in a recent review by Mikhalchan and Vilatela). Thus, macroscopic fiber is a relative new class of materials with applications in field such as structural reinforcement fibers, sensors, porous electrodes, and current collectors …”

“…More importantly, macroscopic fibers and fabrics have mass‐normalized conductivity above metals, comparable tensile strength and modulus to carbon fibers, and superior tensile fracture than Kevlar (reference in a recent review by Mikhalchan and Vilatela). Thus, macroscopic fiber is a relative new class of materials with applications in field such as structural reinforcement fibers, sensors, porous electrodes, and current collectors moderate surface area (200~300 m 2 /g), and good affinity to many polymers make CNT fibers very promising macroscopic reinforcing elements for nanocomposite fabrication.…”

“…Thus, macroscopic fiber is a relative new class of materials with applications in field such as structural reinforcement fibers, sensors, porous electrodes, and current collectors. [26] The combination of flexible porous structure, [27] moderate surface area (200~300 m 2 /g), [28] and good affinity to many polymers [29] make CNT fibers very promising macroscopic reinforcing elements for nanocomposite fabrication. More importantly, composites containing high volume fraction of CNT fibers can be obtained through back infiltration of polymer into porous CNT fiber networks, in which load and charge carrying CNT elements could lead to significant improvements in the resulting composite properties.…”