Data for: Simultaneously enhanced tenacity, rupture work, and thermal conductivity of carbon nanotubes fibers by raising effective tube portion

Although individual carbon nanotubes (CNTs) are superior as constituents
to polymer chains, the mechanical and thermal properties of CNT fibers
(CNTFs) remain inferior to synthetic fibers due to the
failure of embedding CNTs effectively in superstructures. Conventional
techniques resulted in a mild improvement of target properties while
degrading others. Here, a Double-Drawing technique is developed
to rearrange the constituent CNTs in both mesoscale and nanoscale
morphology. Consequently, the mechanical and thermal properties of the
resulting CNTFs can simultaneously reach their highest performances with
specific strength ~3.30 N/tex (4.60 GPa), work of rupture ~70 J/g, and
thermal conductivity ~354 W/m/K, despite starting from low-crystallinity
materials (IG:ID~5). The processed CNTFs are more versatile than
comparable carbon fiber, Zylon and Dyneema. Based on evidence of load
transfer efficiency on individual CNTs measured with
In-Situ-Stretching-Raman, we find the main contributors to property
enhancements are the increasing of the effective tube contribution, in
addition to the known optimization on CNTs alignment and stacking.