Self-Planarization of High-Performance Graphene Liquid
Crystalline Fibers by Hydration
Posted on 2020-06-11 - 22:29
Graphene fibers (GFs) are promising
elements for flexible conductors
and energy storage devices, while translating the extraordinary properties
of individual graphene sheets into the macroscopically assembled 1D
structures. We report that a small amount of water addition to the
graphene oxide (GO) N-methyl-2-pyrrolidone (NMP)
dispersion has significant influences on the mesophase structures
and physical properties of wet-spun GFs. Notably, 2 wt % of water
successfully hydrates GO flakes in NMP dope to form a stable graphene
oxide liquid crystal (GOLC) phase. Furthermore, 4 wt % of water addition
causes spontaneous planarization of wet-spun GFs. Motivated from these
interesting findings, we develop highly electroconductive and mechanically
strong flat GFs by introducing highly crystalline electrochemically
exfoliated graphene (EG) in the wet-spinning of NMP-based GOLC fibers.
The resultant high-performance hybrid GFs can be sewn on cloth, taking
advantage of the mechanical robustness and high flexibility.
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Jung, Hong Ju; Padmajan Sasikala, Suchithra; Lee, Kyung Eun; Hwang, Ho Seong; Yun, Taeyeong; Kim, In Ho; et al. (2020). Self-Planarization of High-Performance Graphene Liquid
Crystalline Fibers by Hydration. ACS Publications. Collection. https://doi.org/10.1021/acscentsci.0c00467